Wikipedia:WikiProject Wales/Article List
FL-Class
- :Grade II* listed buildings in Monmouthshire
- :Grade I listed buildings in Monmouthshire
- :Roald Dahl bibliography
- :Cymru Premier Golden Boot
- :Friends of Friendless Churches
- :Grade I listed buildings in Rhondda Cynon Taf
- :List of Cardiff City F.C. managers
- :List of Cardiff City F.C. players
- :List of Cardiff City F.C. players (25–99 appearances)
- :List of Cardiff City F.C. records and statistics
- :List of Cardiff City F.C. seasons
- :List of County Court venues in England and Wales
- :List of Cymru Premier clubs
- :List of Honorary Fellows of Jesus College, Oxford
- :List of Wales international footballers
- :List of Wales national football team hat-tricks
- :List of alumni of Jesus College, Oxford
- :List of clergy educated at Jesus College, Oxford
- :List of former county courts in Wales
- :List of founding Fellows, Scholars and Commissioners of Jesus College, Oxford
- :List of international goals scored by Gareth Bale
- :List of international goals scored by Ian Rush
- :List of mathematicians, physicians, and scientists educated at Jesus College, Oxford
- :List of new churches by John Douglas
- :List of politicians, lawyers, and civil servants educated at Jesus College, Oxford
- :List of principals and fellows of Jesus College, Oxford
- :List of roles and awards of Catherine Zeta-Jones
- :Registered historic parks and gardens in Monmouthshire
- :Wales national football team results (1876–1899)
- :Wales national football team results (1920–1939)
- :Wales national football team results (1946–1959)
GA-Class
- :Aneurin Bevan
- :Carmarthenshire
- :Ceredigion
- :Charles III
- :Dylan Thomas
- :Millennium Stadium
- :Pembrokeshire
- :Snowdon
- :Wales
- :Barry Docks
- :Barry John
- :Brian Josephson
- :Caernarfon Castle
- :Cardiff Castle
- :Castles and Town Walls of King Edward in Gwynedd
- :Catherine, Princess of Wales
- :Conwy Castle
- :Geography of Wales
- :Harlech Castle
- :Joseph Parry
- :Llandaff Cathedral
- :Mari Lwyd
- :Senedd building
- :Wales Millennium Centre
- :Welsh Corgi
- :Welsh National Opera
- :Welsh cuisine
- :William, Prince of Wales
- :Woollen industry in Wales
- :2007 Welsh Open (snooker)
- :Agriculture in Wales
- :Anglesey Central Railway
- :Beaumaris Castle
- :Bullet for My Valentine
- :Caerphilly Castle
- :Ched Evans
- :Clwyd
- :Craig Bellamy
- :Criccieth Castle
- :Cwm, Llanrothal
- :Cymmer Colliery explosion
- :Diana, Princess of Wales
- :Dolwyddelan Castle
- :Ebbw Valley Railway
- :Flat Holm
- :Fred Dyer
- :George Insole
- :Grosmont Castle
- :Hay Castle
- :Herbert Armitage James
- :Hilston Park
- :Hubert William Lewis
- :Ivor Allchurch
- :James Harvey Insole
- :Jamie Arthur
- :John McFall (athlete)
- :John Toshack
- :Jonathan Pryce
- :Jonny Buckland
- :Julia Gillard
- :Kidwelly and Llanelly Canal
- :Llantwit Major
- :Marina Diamandis
- :Michael Sheen
- :Milford Haven
- :Neath and Tennant Canal
- :Parc Cwm long cairn
- :Pennard Castle
- :Powis Castle
- :Raglan Castle
- :Rhyl Pier
- :Skenfrith Castle
- :St Mary's Church, Tal-y-llyn
- :Thomas Pennant
- :Welsh Pony and Cob
- :Welsh Springer Spaniel
- :White Castle, Monmouthshire
- :Women's suffrage in Wales
- :Y Gododdin
- :(Drawing) Rings Around the World
- :1927 FA Charity Shield
- :1958 FIFA World Cup qualification (AFC/CAF–UEFA play-off)
- :1999 Welsh Conservatives leadership election
- :2006 Heineken Cup final
- :2006 World Cup of Pool
- :2021 Welsh Open (snooker)
- :A4061 road
- :Aberdaron
- :Active-class cruiser
- :Adrift (Torchwood)
- :Alex Lawless
- :Andrew Crofts (footballer)
- :Barmouth Bridge
- :Beatrice Green
- :Billy Geen
- :Blonde-class cruiser
- :Boadicea-class cruiser
- :Caernarfon town walls
- :Caffo
- :Capel Lligwy
- :Castell y Bere
- :Catatonia (band)
- :Charles Wilkins (writer)
- :Clement of Llanthony
- :Constantine (Briton)
- :Conwy town walls
- :Curriculum for Wales (2022–present)
- :Cynfarwy
- :Daniel Parslow
- :David Watts Morgan
- :Delyth Evans
- :Dion Fortune
- :Dolbadarn Castle
- :East and West Blockhouses
- :Eidyn
- :Elizabeth Randles
- :Emilia Baeyertz
- :English Poor Laws
- :G. E. L. Owen
- :Glamorgan sausage
- :Golden Retriever (song)
- :Goronwy ap Tudur Hen
- :Gwen Cooper
- :HMS Active (1911)
- :HMS Ajax (1880)
- :HMS Amphion (1911)
- :HMS Andromeda (1897)
- :HMS Anson (1886)
- :HMS Aurora (1887)
- :HMS Bellona (1909)
- :HMS Blanche (1909)
- :HMS Blonde (1910)
- :HMS Boadicea (1908)
- :HMS Cambrian (1916)
- :HMS Caradoc (D60)
- :HMS Cardiff (D58)
- :HMS Carysfort (1914)
- :HMS Collingwood (1882)
- :HMS Cordelia (1914)
- :HMS Cornwall (1902)
- :HMS Denbigh Castle (K696)
- :HMS Dreadnought (1875)
- :HMS Essex (1901)
- :HMS Fearless (1912)
- :HMS Flint Castle (K383)
- :HMS Howe (1885)
- :HMS Inconstant (1868)
- :HMS Iron Duke (1870)
- :HMS Nile (1888)
- :HMS Nottingham (1913)
- :HMS Penelope (1867)
- :HMS Prince of Wales (1902)
- :HMS Thisbe (1824)
- :HMS Thunderer (1872)
- :Hello Sunshine (Super Furry Animals song)
- :Hervey le Breton
- :Hilda Vaughan
- :Historia Divae Monacellae
- :Humphrey de Bohun, 3rd Earl of Hereford
- :Huw Edwards (conductor)
- :Infant school
- :It's Not the End of the World?
- :Jazz Richards
- :John Williams (snooker referee)
- :Johnny Williams (rugby union, born 1882)
- :Juxtapozed with U
- :Kyle Critchell
- :Levi Mackin
- :Llanishen Reservoir
- :Loughor Castle
- :Mark Aizlewood
- :Martha Hughes Cannon
- :Mary Dilys Glynne
- :Meat (Torchwood)
- :Melangell
- :Monmouth School for Boys
- :Mwng
- :Newport Association Football Club Ltd and others v Football Association of Wales Ltd
- :Newton House, Llandeilo
- :Nidan
- :Norman Biggs
- :O'er the Gloomy Hills of Darkness
- :Old Bridge, Pontypridd
- :Old Church of St Gwenllwyfo, Llanwenllwyfo
- :Our Lady Star of the Sea and St Winefride, Amlwch
- :Park Hall (Oswestry)
- :Penmon
- :Penrhyn Castle
- :Phantom Phorce
- :Phantom Power (Super Furry Animals album)
- :Plas Mawr
- :Pont-y-Cafnau
- :Rachel Barrett
- :Radyr
- :Rakie Ayola
- :Rhys Weston
- :Rhys Williams (Torchwood)
- :Richard Garnons Williams
- :Rings Around the World
- :Sealyham Terrier
- :Sherlock (TV series)
- :Shrewsbury Drapers Company
- :Sibyl de Neufmarché
- :Sir William James, 1st Baronet
- :Slow Life
- :Something Borrowed (Torchwood)
- :South Wales derby
- :St Beuno's Church, Aberffraw
- :St Beuno's Church, Trefdraeth
- :St Caffo's Church, Llangaffo
- :St Caian's Church, Tregaian
- :St Ceidio's Church, Rhodogeidio
- :St Ceinwen's Church, Cerrigceinwen
- :St Cristiolus's Church, Llangristiolus
- :St Cwyllog's Church, Llangwyllog
- :St Cynfarwy's Church, Llechgynfarwy
- :St Deiniol's Church, Llanddaniel Fab
- :St Dona's Church, Llanddona
- :St Edern's Church, Bodedern
- :St Edwen's Church, Llanedwen
- :St Eleth's Church, Amlwch
- :St Enghenedl's Church, Llanynghenedl
- :St Eugrad's Church, Llaneugrad
- :St Ffinan's Church, Llanffinan
- :St Fflewin's Church, Llanfflewin
- :St Gallgo's Church, Llanallgo
- :St Gwenllwyfo's Church
- :St Iestyn's Church, Llaniestyn
- :St Llibio's Church, Llanllibio
- :St Mary's Church, Bodewryd
- :St Mary's Church, Llanfair-yn-y-Cwmwd
- :St Mary's Church, Llanfair-yng-Nghornwy
- :St Mary's Church, Llanfair Mathafarn Eithaf
- :St Mary's Church, Pentraeth
- :St Mary's Church, Rhodogeidio
- :St Michael's Church, Llanfihangel Ysgeifiog
- :St Mihangel's Church, Llanfihangel yn Nhowyn
- :St Nidan's Church, Llanidan
- :St Pabo's Church, Llanbabo
- :St Peirio's Church, Rhosbeirio
- :St Peter's Church, Llanbedrgoch
- :St Peulan's Church, Llanbeulan
- :St Twrog's Church, Bodwrog
- :St Tyfrydog's Church, Llandyfrydog
- :T. E. Lawrence
- :The Checkers (restaurant)
- :The Holy Bible (album)
- :The Red Dragon (magazine)
- :The Tale of the Flopsy Bunnies
- :The Whitebrook
- :Thomas Stephens (historian)
- :Three Castles
- :Timothy Everest
- :To the Last Man (Torchwood)
- :Tudur Hen
- :Walter de Clare
- :Wrexham A.F.C. 2–1 Arsenal F.C.
- :Jess Fishlock
- :Ryland Davies
- :Tom Cole (racing driver)
B-Class
- :Anglesey
- :Cardiff
- :Flag of the United Kingdom
- :Flintshire
- :Glamorgan
- :Great Britain
- :Gruffudd ap Cynan
- :Gwynedd
- :History of Wales
- :Kingdom of Gwynedd
- :Local Government (Wales) Act 1994
- :Merthyr Tydfil
- :Newport, Wales
- :Owain Glyndŵr
- :Plaid Cymru
- :Prince of Wales
- :Senedd
- :Welsh devolution
- :Welsh people
- :1999 Rugby World Cup
- :Anthony Hopkins
- :Beaumaris town walls
- :Caernarfon
- :Cardiff Arms Park
- :Celtic languages
- :Celts
- :Celts (modern)
- :Coastline of Wales
- :Colloquial Welsh morphology
- :Conquest of Wales by Edward I
- :Duffy (singer)
- :Gareth Bale
- :Gavin & Stacey
- :Geology of Wales
- :Glyndŵr rebellion
- :Glynis Johns
- :Great Western Main Line upgrade
- :Hay-on-Wye
- :History of Cardiff
- :History of Plaid Cymru
- :House of Aberffraw
- :House of Tudor
- :Irish Sea
- :Ivor Novello
- :John Cale
- :John Charles
- :Katherine Jenkins
- :Kingdom of Powys
- :Leanne Wood
- :Llywelyn ab Iorwerth
- :Llŷn Peninsula
- :Monmouth
- :Names of the British Isles
- :National Library of Wales
- :Prehistoric Wales
- :River Dee, Wales
- :River Severn
- :Roald Dahl
- :Rowan Williams
- :Ryan Giggs
- :Sarah Siddons
- :Second Severn Crossing
- :Severn Bridge
- :Shirley Bassey
- :Six Nations Championship
- :Snowdonia
- :Stanley Baker
- :Stephen Crabb
- :Tintern Abbey
- :Tom Jones (singer)
- :United Kingdom invocation of Article 50 of the Treaty on European Union
- :University of Wales
- :Welsh Dragon
- :Welsh Labour
- :Welsh independence
- :Welsh toponymy
- :William Williams Pantycelyn
- :2007 National Assembly for Wales election
- :Aberffraw
- :Alex Gordon (architect)
- :Ancient Celtic warfare
- :Anwyl of Tywyn family
- :Arriva Trains Wales
- :Arthur Machen
- :Bangor University
- :Bardsey Island
- :Barry Waterfront
- :Bartholomew Roberts
- :Becky Morgan
- :Ben Thatcher
- :Bernard de Neufmarché
- :Betsi Cadwaladr
- :Blaenau Ffestiniog
- :Bonnie Tyler
- :Bridgend
- :Britannia Bridge
- :Buckley, Flintshire
- :Cadoc
- :Caldey Island
- :Cardiff Central railway station
- :Carmarthen
- :Carnedd Llewelyn
- :Carreglwyd
- :Castell Dinas Brân
- :Celticisation
- :Chepstow
- :Chwilog
- :Coal Mines Act 1911
- :Coat of arms of the Prince of Wales
- :Cyfraith Hywel
- :D. Gwenallt Jones
- :Dafydd ap Gruffydd
- :Danny Gabbidon
- :Desmond Llewelyn
- :Despenser War
- :Dicky Owen
- :Dinas Powys
- :Domesday Book
- :Druid
- :Ednyfed Fychan
- :Elan Valley Reservoirs
- :Ellis ap Griffith
- :Ergyng
- :Ernest Jones
- :Extreme points of the United Kingdom
- :Fagan (saint)
- :Focus Wales
- :Freddie Welsh
- :Gabby Logan
- :Gary Speed
- :George Herbert
- :Gethin Jones
- :Gresford disaster
- :Guinevere
- :Gwen John
- :Harlech
- :Hen Ogledd
- :Henry Morris-Jones
- :Henry Vaughan
- :History of Gwynedd during the High Middle Ages
- :Hugh Evan-Thomas
- :Ian Rush
- :Ian Woosnam
- :Ioan Gruffudd
- :James Fox (singer)
- :Joe Ledley
- :Karl Jenkins
- :Knighton, Powys
- :Leigh Richmond Roose
- :Leila Megàne
- :Leslie Norris
- :Llandow air disaster
- :Llangollen Canal
- :Lordship of Denbigh
- :Lôn Goed
- :M4 motorway
- :MOD St Athan
- :Martyn Joseph
- :Mary Jones and her Bible
- :Max Boyce
- :Molly Scott Cato
- :Monmouthshire and Brecon Canal
- :Music of Wales
- :National Shipyard
- :Neath and Brecon Railway
- :Owain Lawgoch
- :Owen Glendower (novel)
- :Penal laws against the Welsh
- :Penarth
- :Percy Morris
- :Proposed Welsh justice system
- :RAF Angle
- :RAF Brawdy
- :RAF Llandwrog
- :Rail transport in Wales
- :Rhondda
- :Rhondda and Swansea Bay Railway
- :Rhydymwyn
- :Richard Gwyn
- :River Lugg
- :River Teme
- :Rob Brydon
- :Royal Glamorgan Artillery Militia
- :Severn Tunnel
- :Snowdon Mountain Railway
- :South Wales Brigade
- :South Wales Gas Pipeline
- :St Athan
- :St Cadwaladr's Church, Llangadwaladr
- :St Mary's Church, Mold
- :St Padarn's Church, Llanbadarn Fawr
- :Stephen Kinnock
- :Tony Pulis
- :Vale of Rheidol Railway
- :Wales at the Rugby World Cup
- :Welsh rebellions against English rule
- :William Bulkeley Hughes
- :William Mainwaring
- :Windsor Davies
- :Wrexham A.F.C.
- :12th century in Wales
- :16th century in Wales
- :1780s in Wales
- :1790s in Wales
- :17th century in Wales
- :1973 Gwent County Council election
- :1986 in Wales
- :1987 in Wales
- :1988 in Wales
- :1989 in Wales
- :1991 in Wales
- :1992 in Wales
- :1993 in Wales
- :1994 in Wales
- :1995 in Wales
- :1996 in Wales
- :1997 in Wales
- :1998 in Wales
- :1999 in Wales
- :2000 in Wales
- :2001 in Wales
- :2002 in Wales
- :2003 in Wales
- :2004 in Wales
- :2005 in Wales
- :2007 in Wales
- :Abersoch Lifeboat Station
- :Aberystwyth railway station
- :Adam of Usk
- :Aelhaiarn
- :Alexandra quarry
- :Allt-yr-yn
- :Alway
- :Ambrosius Aurelianus
- :Angevin Empire
- :Archaeologia Cambrensis
- :Areas of Outstanding Natural Beauty in Wales
- :Arfor
- :Battle of Buttington
- :Battle of Edgcote
- :Beaumaris Lifeboat Station
- :Brân the Blessed
- :Bull Bay Lifeboat Station
- :Caergwrle Castle
- :Caernarfon railway station
- :Caerphilly Heart Disease Study
- :Caldicot Castle (1794 ship)
- :Cambrian Quarterly Magazine and Celtic Repertory
- :Candleston Castle
- :Cantiorix Inscription
- :Carl G. Jones
- :Catherine Lynch
- :Celtic nations
- :Celtic rainforests in Wales
- :Cemaes Lifeboat Station
- :Cemlyn Lifeboat Station
- :Centre for Advanced Welsh and Celtic Studies
- :Charles Bertram
- :Charlotte Church
- :Chepstow Railway Bridge
- :Clifford Cory
- :Cnapan Hotel
- :Connop Thirlwall
- :Coptic Orthodox Church in Wales
- :Coronet of Charles, Prince of Wales
- :Corris Railway
- :Cors Caron
- :Criccieth Lifeboat Station
- :Crumpet
- :Cuisine of Monmouthshire
- :Curran Steels
- :Cwmbran
- :Cymru
- :Deke Leonard
- :Dennis David
- :Deruvian
- :Dick Rees
- :Dora Herbert Jones
- :Economic history of Wales
- :Eglwys y Bedd
- :Eirwen Gwynn
- :Elis James
- :Elizabeth Morgan (actress)
- :Ellis-Nanney baronets
- :Emiliano Sala
- :Fashion of Catherine, Princess of Wales
- :Feeder (band)
- :FitzRoy Somerset, 4th Baron Raglan
- :Fort Belan
- :Frank Brangwyn
- :Fulk FitzWarin
- :Funeral for a Friend
- :Georgiana Hare-Naylor
- :Gerard Manley Hopkins
- :Gethin Jones (soccer, born 1995)
- :Greville Janner
- :Gwbert
- :Gwladys ferch Dafydd Gam
- :HMS Arethusa (1817)
- :HMS Melampus (1820)
- :HMS Myrmidon (1813)
- :HMS Nereus (1821)
- :HMS Valorous (1816)
- :Harold Jones (murderer)
- :Henry Bartle Frere
- :History of education in Wales
- :Horton Davies
- :Hugh Ellis-Nanney
- :Hugh Llewellyn Glyn Hughes
- :Huw Dixon
- :Idris Jones (chemist)
- :James Augustus St. John
- :James Relly
- :Jem (singer)
- :Jessie Penn-Lewis
- :Joanna Penberthy
- :Joe Calzaghe
- :John Barnard Jenkins
- :John Dee
- :John Prescott
- :John Ystumllyn
- :Joseph Edwards (sculptor)
- :Kathleen and May
- :Klondyke mill
- :Leighton Hall, Powys
- :Lembit Öpik
- :Lewis Llewelyn Dillwyn
- :Lily Argent
- :List of non-marine molluscs of Great Britain
- :Lisvane
- :Llanddwyn Lifeboat Station
- :Llangelynnin, Conwy
- :Llangolman
- :Llyn Cerrig Bach
- :Llywernog Mine
- :Llŷr Williams
- :Madoc
- :Margaret Haig Thomas, 2nd Viscountess Rhondda
- :Marriage in England and Wales
- :Mary Gillham
- :Meic Stephens
- :Mel Charles
- :Meurig ab Arthfael
- :Michael Heseltine
- :Michael Owen
- :Midland Union of Natural History Societies
- :Murder of Lynette White
- :Myvanwy Rhys
- :Nannau, Wales
- :Nathan Cleverly
- :Nerquis Hall
- :Newborough, Anglesey
- :Nicholas Carew (died 1311)
- :Origins of Falkland Islanders
- :Pains and Penalties Bill 1820
- :Parkmill
- :Parrot Corporation
- :Patrick Gibbs
- :Pencoedtre
- :Pendoylan
- :Philip Jones Griffiths
- :Poppit Sands
- :Porth Ruffydd Lifeboat Station
- :Prince of Wales Theatre, Cardiff
- :Princess Charlotte of Wales (ship)
- :Pushing the Senses
- :Raglan, Monmouthshire
- :Regions of Wales
- :Renewable energy in Wales
- :Rhosydd quarry
- :Richard Williams Morgan
- :Richard of Cirencester
- :Robert Fitzhamon
- :Robert Vaughan (antiquary)
- :Rowland Laugharne
- :Ruth Madoc
- :Rǫgnvaldr Guðrøðarson
- :SS Beemsterdijk
- :SS Ben Seyr
- :Saint Ninnoc
- :Selina Rushbrook
- :Sir Robert Vaughan, 2nd Baronet
- :St Chad's Church, Holt
- :St Deiniol's Church, Hawarden
- :St Garmon's Church, Llanfechain
- :St Hilary, Vale of Glamorgan
- :St Michael and All Angels Church, Kerry
- :Staylittle
- :Stereophonics
- :Sylvia Sleigh
- :Talhenbont Hall
- :Tanat Valley Light Railway
- :Tenby Lifeboat Station
- :The Black Cauldron (film)
- :The Crown
- :The Description of Britain
- :Third Menai Crossing
- :Thomas Bowles (priest)
- :Thorne Island
- :Tiggy Legge-Bourke
- :Tom Pryce
- :Tom Rees (aviator)
- :Torchwood
- :Trawsfynydd railway station
- :United Rugby Championship
- :Urban (bishop of Llandaff)
- :Vortigern
- :Wales Comic Con
- :Waun Mawn
- :Welsh Church Commissioners
- :Welsh Tax Acts etc. (Power to Modify) Act 2022
- :Why Didn't They Ask Evans?
- :William, Prince of Wales, in film and television
- :Wrexham Police Station (1973–2020)
- :Wye Valley Railway
- :Wynn baronets
- :Ymadawiad Arthur
- :2021 Welsh Labour–Plaid Cymru agreement
- :All Saints' Church, Llangar
- :Beli Mawr
- :Coal tips in Wales
- :David Watkin Jones
- :Early modern Britain
- :Edmund Prys
- :Elspeth Hughes-Davies
- :Fields in Trust
- :Grove Park School, Wrexham
- :Hannah Grae
- :Island Green
- :Jamie Lewis
- :John Meurig Thomas
- :Klervi
- :Llanaelhaearn Lifeboat Station
- :Llanddulas Lifeboat Station
- :Llyn y Tri Greyenyn
- :National Contemporary Art Gallery for Wales
- :Pa gur
- :Pant-yr-Ochain
- :Penmon Lifeboat Station
- :Rhoscolyn Lifeboat Station
- :Rhosneigr Lifeboat Station
- :Salisbury Park Conservation Area
- :Samuel Maurice Jones
- :St Cyngar's Church, Hope
- :Sue Essex
- :The Colours (play)
- :The Magpie's Advice
- :The Snow (poem)
- :To the Yew Tree Above Dafydd ap Gwilym's Grave
- :Trinity Presbyterian Church, Wrexham
- :Wales national rugby league team
- :Waterworld, Wrexham
C-Class
- :Carwyn Jones
- :David Lloyd George
- :Flag of Wales
- :Gareth Edwards
- :Llywelyn ap Gruffudd
- :Mabinogion
- :Mark Drakeford
- :Mining in Wales
- :Monmouthshire (historic)
- :North Wales
- :Politics of Wales
- :Powys
- :Rhondda Cynon Taf
- :Rugby union in Wales
- :Saint David
- :Science and technology in Wales
- :South Wales
- :Sport in Wales
- :Swansea
- :Welsh Government
- :Welsh art
- :Welsh language
- :Wrexham
- :Wrexham County Borough
- :2014 Wales summit
- :Aberystwyth
- :Alun Michael
- :Anarawd ap Rhodri
- :Angharad Tomos
- :Ar Hyd y Nos
- :Architecture of Wales
- :BBC Cymru Wales
- :BBC Radio Wales
- :Black Book of Carmarthen
- :Blaenavon Industrial Landscape
- :British people
- :Cambrian Line
- :Cardiff Airport
- :Cardiff City Stadium
- :Cardiff RFC
- :Cardiff Rugby
- :Cardiff city centre
- :Catholic Church in England and Wales
- :Celtic Britons
- :Chepstow Castle
- :Christianity in Wales
- :Church in Wales
- :Colin Jackson
- :Ebbw Vale Steelworks
- :Economy of Wales
- :Eisteddfod
- :England–Wales border
- :English criminal law
- :Gerald of Wales
- :Great Orme
- :Griff Rhys Jones
- :Guto'r Glyn
- :Gwynfor Evans
- :Henry Morton Stanley
- :Henry VII of England
- :History of the Welsh language
- :Holy Island, Anglesey
- :ITV Wales & West
- :Iolo Morganwg
- :Joseph Kappen
- :Judicial review in English law
- :Judiciary of England and Wales
- :Laura Ashley
- :Laws in Wales Acts 1535 and 1542
- :Leek
- :Legislatures of the United Kingdom
- :Leo Abse
- :Llanfairpwllgwyngyll
- :Lostprophets
- :Madog ap Llywelyn
- :Manic Street Preachers
- :Marcher lord
- :Menai Strait
- :Middle Welsh
- :Mold, Flintshire
- :NHS Wales
- :Neath RFC
- :Neil Kinnock
- :Noah's Ark Children's Hospital for Wales
- :Offa's Dyke
- :Owain Glyndŵr Day
- :Plas y Brenin
- :Pontcysyllte Aqueduct
- :Port Talbot
- :Pound sterling
- :Prehistoric Britain
- :Princess of Wales
- :Principality of Wales
- :Protected areas of Wales
- :R. S. Thomas
- :Radio in Wales
- :Ray Gravell
- :Religion in Wales
- :Rhodri Mawr
- :Richard Burton
- :Richard Price
- :River Teifi
- :Ron Davies (Welsh politician)
- :Ruth Jones
- :S4C
- :Saint David's Day
- :Sam Warburton
- :Saunders Lewis
- :Simon Weston
- :South Wales Main Line
- :South Wales Valleys
- :St. Jude storm
- :St Davids Cathedral
- :Super Furry Animals
- :Swansea University
- :Taliesin
- :Terry Matthews
- :Timeline of Welsh history
- :Traditional Welsh costume
- :Transport in Wales
- :Trunk roads in Wales
- :University of Wales Trinity Saint David
- :Wales in the Roman era
- :Wales national football team
- :Warren Gatland
- :Wat's Dyke
- :Welsh-language literature
- :Welsh Conservatives
- :Welsh English
- :Welsh Guards
- :Welsh Language Act 1967
- :Welsh Language Act 1993
- :Welsh Marches
- :Welsh Methodist revival
- :Welsh Not
- :Welsh Rugby Union
- :Welsh literature in English
- :Welsh nationalism
- :Ysgol Uwchradd Caergybi
- :1607 Bristol Channel floods
- :1904–1905 Welsh revival
- :1958 British Empire and Commonwealth Games
- :2010 Welsh Open (snooker)
- :2018 Wales Rally GB
- :A-level
- :A40 road
- :A470 road
- :Aaron Ramsey
- :Aberaman
- :Aberdare
- :Aberdare Canal
- :Aberfan Disaster Tribunal
- :Abergavenny
- :Abergele rail disaster
- :Aberystwyth Castle
- :Aberystwyth University
- :Adam Price
- :Albert Evans-Jones
- :Alex Jones (Welsh presenter)
- :Alexandra (Newport and South Wales) Docks and Railway
- :All Saints' Church, Gresford
- :Alun Wyn Jones
- :Amy Dillwyn
- :Ann Clwyd
- :Ann Griffiths
- :Annabel Giles
- :Anne Beale
- :Arenig Fawr
- :Atlantic College
- :Augusta Hall, Baroness Llanover
- :Augustus John
- :Autism Cymru
- :Awen
- :BBC Radio Cymru
- :Baldwin III, Count of Guînes
- :Bando (sport)
- :Bard
- :Barry, Vale of Glamorgan
- :Barry Island
- :Barry Island railway station
- :Battle of Pwll Melyn
- :Bernice Rubens
- :Bessie Jones (Welsh singer)
- :Bethan Gwanas
- :Betty Campbell
- :Biodiversity of Wales
- :Black Mountain (range)
- :Blackwood, Caerphilly
- :Blorenge
- :Bodelwyddan Castle
- :Bodnant Garden
- :Brains Brewery
- :Brecknockshire
- :Brecon Beacons National Park
- :Bristol Channel
- :Bristol and South Wales Union Railway
- :British & Irish Lions
- :Brittonic languages
- :Broadcasting House, Cardiff
- :Bryngarw Country Park
- :Buildings associated with Owain Glyndŵr
- :Business ownership within England and Wales
- :Cadwgan ap Bleddyn
- :Caldey Abbey
- :Cambria
- :Cambrian Railways
- :Caratacus
- :Cardiff Athletic Club
- :Cardiff Bay
- :Cardiff Bus
- :Cardiff Central (Senedd constituency)
- :Cardiff Central Library
- :Cardiff Central bus station
- :Cardiff Council
- :Cardiff Docks
- :Cardiff English
- :Cardiff Metropolitan University
- :Cardiff North (Senedd constituency)
- :Cardiff Philharmonic Orchestra
- :Cardiff South and Penarth (Senedd constituency)
- :Cardiff University
- :Cardiff University School of Medicine
- :Cardiff West (Senedd constituency)
- :Carmarthenshire County Council
- :Carmarthen–Aberystwyth line
- :Carol Vorderman
- :Carreg Cennen Castle
- :Carwyn James
- :Caswell Bay
- :Cathays Park
- :Cawl
- :Ceredigion (UK Parliament constituency)
- :Ceredigion Coast Path
- :Ceri Richards
- :Cerys Matthews
- :Chairing of the Bard
- :Chester and Holyhead Railway
- :Chris Coleman (footballer)
- :Chris Mepham
- :Christopher Williams (Welsh artist)
- :City and County of Swansea Council
- :Civil Procedure Rules
- :Civil parish
- :Connah's Quay Nomads F.C.
- :Conwy Valley line
- :Corona (soft drink)
- :Corporate manslaughter in English law
- :County Hall, Cardiff
- :Crempog
- :Crumlin Arm (Monmouthshire canal)
- :Crwth
- :Cuisine of Pembrokeshire
- :Culture and recreation in Cardiff
- :Cyfarthfa Castle
- :Cyfarthfa Ironworks
- :Cymru Premier
- :Dafydd Wigley
- :Dai Greene
- :Dai Rees
- :Daniel Curtis (composer)
- :David Rees (Y Cynhyrfwr)
- :David T. C. Davies
- :Dee Regulation Scheme
- :Deep Navigation Colliery
- :Deeside
- :Descriptio Cambriae
- :Dimlands
- :Dinas Powys hillfort
- :Dolgarrog
- :Dolgellau
- :Donald Davies
- :Dowlais Ironworks
- :Dragons RFC
- :Druid's Head Inn
- :Dyffryn Gardens
- :Ebbw Vale
- :Economy of Cardiff
- :Edwina Hart
- :Eleazar Roberts
- :Ely Valley Railway
- :Englynion y Beddau
- :Erddig
- :Ernest Vaughan, 7th Earl of Lisburne
- :Eurwyn Wiliam
- :Eve Myles
- :Faggot (food)
- :Fairbourne Railway
- :Ffestiniog Railway
- :Flint, Flintshire
- :Flint Castle
- :Four Branches of the Mabinogi
- :Frustration in English law
- :Full fiscal autonomy for Scotland and Wales
- :Gareth Jones (journalist)
- :Gareth Thomas (rugby, born 1974)
- :Garnant
- :Geoff Charles
- :Geoffrey of Monmouth
- :George Thomas, 1st Viscount Tonypandy
- :Geraint Davies (Labour politician)
- :Geraint Thomas
- :Gerald Davies
- :Gethin ap Gruffydd
- :Glamorgan County Council
- :Glamorganshire Canal
- :Glanamman
- :Glenys Kinnock
- :Gower Peninsula
- :Grave of David Lloyd George
- :Great Western Railway in West Wales
- :Guto Puw
- :Gwennan Gorn
- :Gwili Railway
- :Gwydir Forest
- :Gwyn A. Williams
- :Gwynedd Council
- :Gwyneth Lewis
- :Harri Webb
- :Hawys Gadarn
- :Heart Cheshire and North East Wales
- :Henry Milbourne
- :Henry V of England
- :Hensol Castle
- :Hinterland (TV series)
- :Hirwaun
- :History Grounded
- :History of Milford Haven
- :History of rent control in England and Wales
- :House of Gwynedd
- :Howard Marks
- :Hung parliament
- :Huw Edwards
- :Hywel ab Owain Gwynedd
- :Ian Watkins (Lostprophets singer)
- :Ifor ap Glyn
- :Institute of Welsh Affairs
- :International relations of Wales
- :J. P. R. Williams
- :James Hanley (novelist)
- :James Szlumper
- :Jason Koumas
- :Jill Evans
- :Jodie Marie
- :John Charlton, 1st Baron Charlton
- :John Cory
- :John Cowper Powys
- :John Crichton-Stuart, 3rd Marquess of Bute
- :John Hartson
- :John Humphrys
- :John Montgomery Traherne
- :John Rhys-Davies
- :John Syer Bristowe
- :John Thomas, Baron Thomas of Cwmgiedd
- :John Thomas (photographer)
- :Jonathan Davies (rugby, born 1962)
- :June Osborne
- :Kate Roberts (author)
- :Ken Jones (rugby union, born 1921)
- :Lady Charlotte Guest
- :Lee Waters
- :Leigh Halfpenny
- :Lisa Scott-Lee
- :Liz Fuller
- :Llancaiach Fawr
- :Llandrindod Wells
- :Llanelli
- :Llanelli RFC
- :Llanelly Railway
- :Llanelly and Mynydd Mawr Railway
- :Llanfendigaid Estate
- :Llanfyllin
- :Llantrisant and Taff Vale Junction Railway
- :Llanvihangel Court
- :Llewelyn Kenrick
- :Lloegyr
- :Local Government Act 1929
- :Logo of the Welsh Rugby Union
- :Lucy Thomas
- :Machynlleth
- :Maelgwn Gwynedd
- :Magistrate (England and Wales)
- :Magnus Maximus
- :Malltraeth Marsh
- :Manchester and Milford Railway
- :Margam Stones Museum
- :Margaret Price
- :Mark Hughes
- :Marquess of Abergavenny
- :Martyn Lloyd-Jones
- :Mary Dillwyn
- :Mary Hopkin
- :Mary Thomas O'Neal
- :Matthew Rhys
- :Media in Cardiff
- :Medical education in Wales
- :Medieval Welsh literature
- :Menai Suspension Bridge
- :Merfyn Frych
- :Merthyr, Tredegar and Abergavenny Railway
- :Merthyr Tydfil (UK Parliament constituency)
- :Merthyr Tydfil County Borough
- :Milford Haven Waterway
- :Millicent Mackenzie
- :Modern history of Wales
- :Moel Siabod
- :Monmouth Boroughs (UK Parliament constituency)
- :Monmouth Priory
- :Monmouth cap
- :Monmouthshire County Council
- :Monmouthshire Railway and Canal Company
- :Monmouthshire and South Wales Coal Owners' Association
- :Montgomery Canal
- :Murders of Harry and Megan Tooze
- :Nantlais Williams
- :Nantlle Valley
- :Narberth, Pembrokeshire
- :National Assembly for Wales (Official Languages) Act 2012
- :National Forest for Wales
- :Neath Abbey
- :Newbridge, Caerphilly
- :Newport City Council
- :Newport County A.F.C.
- :Newport railway station
- :Nigel Owens
- :Noddfa Chapel, Treorchy
- :North Wales Narrow Gauge Railways
- :North Wales Pilgrim's Way
- :North Wales child abuse scandal
- :Oak at the Gate of the Dead
- :Old Beaupre Castle
- :Order of precedence in England and Wales
- :Ospreys (rugby union)
- :Owen Smith
- :Panteg Steel Works
- :Parc le Breos
- :Paul Flynn (politician)
- :Paul Murphy, Baron Murphy of Torfaen
- :Paul Radmilovic
- :Paul Whitehouse
- :Pembroke, Pembrokeshire
- :Pembroke (UK Parliament constituency)
- :Pembroke Dock
- :Pembrokeshire (UK Parliament constituency)
- :Penparcau
- :Penrhyndeudraeth
- :Percy Thomas Partnership
- :Peter Hain
- :Picton Castle
- :Plas Newydd (Anglesey)
- :Plygain
- :Politics in Cardiff
- :Pontypool and Blaenavon Railway
- :Pontypridd, Caerphilly and Newport Railway
- :Porius: A Romance of the Dark Ages
- :Porthmadog
- :Preseli Mountains
- :Priory Church of St Mary, Abergavenny
- :Priory Church of St Mary, Chepstow
- :Proposed Saint David's Day bank holiday
- :Proposed further Welsh devolution
- :Pwll Du Tunnel
- :RAF Pengam Moors
- :RAF Wrexham
- :Rail transport in Cardiff
- :Ray Milland
- :Raymond Williams
- :Rebecca Riots
- :Reservoirs of Wales
- :Rheola House
- :Rhinogydd
- :Rhos Rydd Shield
- :Rhydian Roberts
- :Rhymney Railway
- :Richard Marquand
- :Richard Mullock
- :Richard de Grenville
- :River Cleddau
- :River Ogmore
- :River Usk
- :Rob Edwards (footballer, born 1982)
- :Robert Owen
- :Rogerstone
- :Rolls Series
- :Roy Jenkins
- :Royal Commission on the Constitution (United Kingdom)
- :Royal Glamorgan Light Infantry
- :Royal Mint
- :Ruabon
- :Ruperra Castle
- :Ruthin
- :Saint Non
- :Saint Teilo
- :Salem (painting)
- :Sarah Jane Rees
- :Sarah Murphy (politician)
- :Sarah Wesley
- :Sarah Winifred Parry
- :Sasha (DJ)
- :Scarlets
- :Sea Empress oil spill
- :Second Hundred Years' War
- :Senedd constituencies and electoral regions
- :Shane Williams
- :Sharon Morgan
- :Shri Swaminarayan Mandir, Cardiff
- :Shropshire Union Canal
- :Shropshire and Montgomeryshire Railway
- :Silures
- :Sir Watkin Williams-Wynn, 3rd Baronet
- :Siân Lloyd
- :Siân Phillips
- :Siôn Dafydd Rhys
- :Skomer
- :South Wales Borderers
- :Spark (horse)
- :St Asaph
- :St Davids
- :St John's Church, Abergavenny
- :St Lythans burial chamber
- :St Mapley's Church, Llanvapley
- :St Mary's Priory Church, Monmouth
- :St Winefride's Well
- :Swansea (UK Parliament constituency)
- :Swansea Canal
- :Swansea City A.F.C.
- :Swansea City Centre
- :Swansea District (UK Parliament constituency)
- :Swansea docks
- :Swansea railway station
- :Taff Trail
- :Taff Vale Railway
- :Terry Jones
- :Terry Yorath
- :The National Archives (United Kingdom)
- :The Spooners of Porthmadog
- :Thomas Alwyn Lloyd
- :Thomas Johnes
- :Thomas Peers Williams
- :Thomas Phillips (mayor)
- :Thomas Prothero
- :Thomas Wiliems
- :Tiger Bay
- :Timeline of Cardiff history
- :Tom James (rower)
- :Tommy Cooper
- :Trades Union Congress
- :Transport in Cardiff
- :Treaty of Montgomery
- :Tredegar
- :Tregaron
- :Tretower Court
- :Triawd y Coleg
- :Triple Crown (rugby union)
- :University of Glamorgan
- :Valleys & Cardiff Local Routes
- :Vaynol
- :Victor Spinetti
- :Vortiporius
- :W. F. Grimes
- :Wales at the UEFA European Championship
- :Wales in the World Wars
- :Walter Conway
- :Wayne Jones (footballer)
- :Welsh Church Act 1914
- :Welsh Courts Act 1942
- :Welsh Highland Railway restoration
- :Welsh Language (Wales) Measure 2011
- :Welsh Open (snooker)
- :Welsh Tower houses
- :Welsh Triads
- :Welsh pig
- :Welshpool
- :West Carmarthenshire (UK Parliament constituency)
- :West Wales lines
- :William Abraham (trade unionist)
- :William Lewis, 1st Baron Merthyr
- :William Morgan (Bible translator)
- :William Price (physician)
- :Woodham Brothers
- :Wye Tour
- :Wye Valley
- :Wyndcliff
- :Wynford Evans
- :Xplore!
- :Y Wladfa
- :1176 Cardigan eisteddfod
- :118 118 (UK)
- :12–16 Church Street, Monmouth
- :1883 Home Nations Championship
- :1890 East Carmarthenshire by-election
- :1892 Merionethshire County Council election
- :1898 Carmarthenshire County Council election
- :1915–1916 Church of England border polls
- :1919 South Wales race riots
- :1921 Cardiganshire by-election
- :1945 Neath by-election
- :1970–71 WFA Cup
- :1982 WFA Cup final
- :1982 visit by Pope John Paul II to the United Kingdom
- :1983 Vale of Glamorgan Borough Council election
- :1991 Ogwr Borough Council election
- :1991 Women's Rugby World Cup
- :1995 Vale of Glamorgan Council election
- :1997 Five Nations Championship
- :1998–99 Swansea City A.F.C. season
- :2005 South Wales E. coli O157 outbreak
- :2008 Denbighshire County Council election
- :2012 Cardiff South and Penarth by-election
- :2012 Denbighshire County Council election
- :2012 Wales rugby union tour of Australia
- :2013–14 United Kingdom winter floods
- :2017 Gwynedd Council election
- :2017 United Kingdom general election in Wales
- :2017 Welsh local elections
- :2018 Cardiff National Eisteddfod
- :2018 Welsh Labour leadership election
- :2018–19 Celtic Cup
- :2019 Brecon and Radnorshire by-election
- :2019 Newport West by-election
- :2019 United Kingdom general election in Wales
- :2019 Wales Rally GB
- :2019–20 Celtic Cup
- :2021 Senedd election
- :2022 Bridgend County Borough Council election
- :2022 Caerphilly County Borough Council election
- :2022 Carmarthenshire County Council election
- :2022 Ceredigion County Council election
- :2022 Denbighshire County Council election
- :2022 Gwynedd Council election
- :2022 Six Nations Championship
- :2022 Wrexham County Borough Council election
- :2024 Scottish Challenge Cup final
- :2024 Six Nations Championship
- :3rd (Volunteer) Battalion, Royal Regiment of Wales
- :A. G. Edwards (bishop)
- :A4232 road
- :Abbie Fleming
- :Abel Morgan
- :Abercynon railway station
- :Aberdare Urban District Council Tramways
- :Aberdyfi
- :Aberfan
- :Abergynolwyn railway station
- :Aberthaw Lime Works
- :Aberystwyth Rheidol
- :Abi Morgan
- :Abolish the Welsh Assembly Party
- :Adamsdown
- :Adele Nicoll
- :Adelina Patti
- :Admiral Group
- :Adran Leagues
- :Adrian Masters
- :Adrian Street
- :Adventure Travel (bus company)
- :Afon Clun
- :Age of consent reform in the United Kingdom
- :Agincourt Square, Monmouth
- :Alan Cox (computer programmer)
- :Alban Square, Aberaeron
- :Albert J. Pitman
- :Alexander Rolls
- :Alfred Janes
- :Alice Abadam
- :Alice Margaret Cooke
- :Alis Mallt Williams
- :Alisha Joyce-Butchers
- :Alison Bielski
- :Allison Pearson
- :Alun Oldfield-Davies
- :Alwyn D. Rees
- :Alys (TV series)
- :Ambition North Wales
- :Ammanford
- :Ammanford Cricket Club
- :An American Werewolf in London
- :Andrew Pagett
- :André Hue
- :Aneurin Owen (antiquarian)
- :Anna McMorrin
- :Anna Williams (poet)
- :Anne Penny
- :Anne Smith (academic)
- :Anneka Rice
- :Anthracite Miners' Association
- :Apostolic Church (1916 denomination)
- :Architecture of Cardiff
- :Archæologia Britannica
- :Armed forces in Wales
- :Arthur Edwin Stevens
- :Arthur Horner (trade unionist)
- :Arthur Linton
- :Ashley Williams (footballer)
- :Aspect Television
- :Audrey Williams (archaeologist)
- :Augustine Baker
- :BBC Cardiff Singer of the World competition
- :Banc Tynddol sun-disc
- :Bangor railway station (Wales)
- :Barnett formula
- :Baron Tredegar
- :Barry railway station
- :Basil Jones
- :Battle of the Conwy
- :Bedd-y-Cawr Hillfort
- :Beddoe Rees
- :Bedwellty
- :Beechwood Park, Newport
- :Beguildy
- :Ben Gunn (campaigner)
- :Ben Phillips (YouTuber)
- :Bernard Fox (actor)
- :Bersham Colliery
- :Bethan Sayed
- :Beti Rhys
- :Betsy (singer)
- :Big House, Landshipping
- :Bill Roberts (rugby union)
- :Bill Withers (snooker player)
- :Billy Hughes (footballer, born 1918)
- :Black Mountains, United Kingdom
- :Blackwood Interchange
- :Blackwood Miners Welfare Institute
- :Blaen y Cwm quarry
- :Blaenau Festiniog Junction railway station
- :Blaenau Ffestiniog Central railway station
- :Blaenau Ffestiniog North railway station
- :Blaenau Ffestiniog passenger stations
- :Blaenffos
- :BlossomWatch
- :Bodelwyddan
- :Bodysgallen Hall
- :Bonc yr Hafod
- :Book of Common Prayer (1984)
- :Borough Welsh Congregational Chapel
- :Bradley Pryce
- :Brenda Chamberlain (artist)
- :Brennan Johnson
- :Bridgend Central
- :Bristol Channel pilot cutter
- :British Home Championship
- :British baseball
- :British literature in languages other than English
- :Bron-Yr-Aur
- :Broughton Shopping Park
- :Brymbo
- :Brymbo Hall
- :Brymbo railway branch lines
- :Bryn Eglwys quarry
- :Brynglas Tunnels
- :Brynglas railway station
- :Brynkinalt
- :Brynmawr rubber factory
- :Brynteg School
- :Bus transport in Cardiff
- :Butchers' Market, Wrexham
- :Bute Park
- :Bute Street, Cardiff
- :Butetown
- :COVID-19 pandemic in Wales
- :Cabinet Secretary for Transport (Wales)
- :Cadair Idris
- :Cadfan ap Iago
- :Caer
- :Caergwrle
- :Caernarfonshire
- :Calfaria Chapel, Aberdare
- :Cambrian Mills
- :Cambrian Pottery
- :Cambrian quarry
- :Camelot
- :Canton, Cardiff
- :Cantref Coch
- :Capel Colman
- :Capel Curig
- :Capel Garmon Firedog
- :Car gwyllt
- :Cardiff, Wales: 6/23/04
- :Cardiff Capital Region
- :Cardiff Central (UK Parliament constituency)
- :Cardiff Corporation Waterworks
- :Cardiff Demons
- :Cardiff Devils
- :Cardiff Dragons (netball)
- :Cardiff Ely bread riots
- :Cardiff Greyhounds
- :Cardiff Harbour Authority
- :Cardiff Rivers Group
- :Cardiff South and Penarth (UK Parliament constituency)
- :Cardiff power stations
- :Carew Tidal Mill
- :Carmarthen Bridge
- :Carmarthen Town North and South
- :Carnarvon Castle railway station
- :Caroline Jones (politician)
- :Caroline Skeel
- :Carreghofa Castle
- :Castell Arnallt
- :Castell Caer Seion
- :Castle Green House
- :Cathays
- :Catherine Davies (governess)
- :Cathryn Mitchell
- :Cecily Mackworth
- :Celtic League
- :Celtic Manor Resort
- :Celtic Sea
- :Celtic mass
- :Cemaes Head
- :Cenarth Bridge
- :Central Arcade, Wrexham
- :Chambers family
- :Charles William Jones
- :Chepstow School
- :Cherry Vann
- :Chippenham Mead
- :Christ Church, Bryn-y-Maen
- :Christ Church, Rossett
- :Christ Church, Welshpool
- :Christianity and association football
- :Christina Rees
- :Church of Our Lady of Mount Carmel, Lampeter
- :Church of St Beuno and St Mary
- :Church of St Eurgain and St Peter
- :Church of St John the Baptist, Llanblethian
- :Church of St Michael and All Angels, Llanvihangel-Ystern-Llewern
- :Church of St Thomas the Martyr, Monmouth
- :Church of the Holy Cross, Cowbridge
- :City, Powys
- :Clark's Pies
- :Clash at the Castle (2022)
- :Clear red water
- :Clemenstone
- :Clement Price Thomas
- :Cliff Jones (Welsh footballer)
- :Climate of Wales
- :Clive Hicks-Jenkins
- :Clocaenog Forest Man
- :Clwydian Range and Dee Valley
- :Clytha Park
- :Coed Darcy
- :Coedarhydyglyn
- :Coedpoeth
- :Cofiwch Dryweryn
- :Colcot
- :Cole Dasilva
- :Comic Con Wales
- :Common land
- :Comprehensive school
- :Compulsory purchase in England and Wales
- :Conwy Railway Bridge
- :Cornish heraldry
- :Cory McKenna
- :Cotswold-Severn Group
- :County Buildings, Wrexham
- :Court Farm, Pembrey
- :Court of Exchequer Chamber
- :Cowbridge Girls School
- :Cowlyd Tramway
- :Craig-y-Nos Castle
- :Craig Rhiwarth
- :Crannog
- :Crawshay Bailey Jr
- :Crickhowell Bridge
- :Croesor quarry
- :Cross of Wales
- :Crown and Thistle Inn, Monmouth
- :Crumlin Viaduct
- :Crusaders Rugby League
- :Crymych
- :Cuisine of Carmarthenshire
- :Cuisine of Gower
- :Cuisine of Swansea
- :Cwm Prysor Halt railway station
- :Cwm Rhondda
- :Cwmavon, Torfaen
- :Cwmgelli Cemetery
- :Cwmorthin quarry
- :Cycling in Cardiff
- :Cyclone Anne (2014)
- :Cyclone Dirk
- :Cyclone Tini
- :Cyclone Xaver
- :Cyfarthfa Band
- :Cyfoesi Myrddin a Gwenddydd ei Chwaer
- :Cymmer, Rhondda Cynon Taf
- :Cynan Jones
- :D. J. Cathcart King
- :Dafydd Elis-Thomas
- :Dai Parker
- :Dan Biggar
- :Dapol
- :David Banner (game designer)
- :David Crystal
- :David Edwards (footballer, born 1986)
- :David FitzGerald
- :David Garner (artist)
- :David James Davies
- :David R. Jones (architect)
- :David Thomas (educationalist)
- :Davies brothers of Bersham
- :Dawnus
- :De Excidio et Conquestu Britanniae
- :Deeside Tramway
- :Deeside and Moelfferna quarries
- :Delyth Morgan, Baroness Morgan of Drefelin
- :Denis O'Connor (police officer)
- :Derrick Morris
- :Dic Penderyn
- :Dick Atkin, Baron Atkin
- :Dickie Morris
- :Dilys Price
- :Dinas Rock
- :Dinas railway station (Festiniog Railway)
- :Dinefwr Park National Nature Reserve
- :Dinogad's Smock
- :Dinorwig Power Station
- :Diphwys railway station
- :Doctor Who
- :Doctor Who fandom
- :Dolaucothi Estate
- :Dolaucothi Gold Mines
- :Dolgoch quarry, Gwynedd
- :Dolgoch railway station
- :Dolmelynllyn Estate
- :Dolobran, Montgomeryshire
- :Dorothy Edwards (Welsh novelist)
- :Dorothy Miles
- :Dragon's Back Race
- :Drew Parker
- :Dudley Lloyd-Evans
- :Duffws railway station (Festiniog Railway)
- :East Camp
- :Ebbw Vale RLFC
- :Edith Mansell-Moullin
- :Edward Davies (minister)
- :Edward Jones (Welsh architect)
- :Edward Turberville
- :Edward Welchman
- :Edward Williams (minister)
- :Efnysien
- :Eighty-five martyrs of England and Wales
- :Eileen Rees
- :Eiluned Lewis
- :Eirias Stadium
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- :Poppy-Grace Stickler
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- :Recommended place-names in Snowdonia
- :Risca colliery disasters
- :Shakin' Stevens
- :St David's Church, Barmouth
- :That Roundhouse
- :The Mirror (poem)
- :The Oxford Book of Welsh Verse
- :The Ploughman
- :The Poet's Burial for Love
- :The Poet and the Grey Friar
- :The Ruin (Dafydd ap Gwilym poem)
- :Thomas Carey Evans
- :Townships in Montgomeryshire
- :Veronica Milligan
- :Viscount St Davids
- :Welsh syntax
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Start-Class
- :Bangor, Gwynedd
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- :Bridgend County Borough
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- :Dafydd ap Llywelyn
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- :Westgate Hotel
- :1880–81 Home Nations rugby union matches
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- :Alexander Cordell
- :Archbishop of Wales
- :BBC National Orchestra of Wales
- :BBC Wales Today
- :Bangor Cathedral
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- :Brecon
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- :Bryn Terfel
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- :Calon Lân
- :Cambrian Mountains
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- :Cerdd Dant
- :Chartism in Wales
- :Cledwyn Hughes, Baron Cledwyn of Penrhos
- :Coal industry in Wales
- :Commission on Devolution in Wales
- :Community (Wales)
- :Coracle
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- :Culture of Wales
- :Dafydd Iwan
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- :Daniel Owen
- :Deheubarth
- :Demographics of Wales
- :Denbighshire (historic)
- :Dyfed
- :Edgar Evans
- :Education in Wales
- :Emlyn Hooson, Baron Hooson
- :Flintshire (historic)
- :Geiriadur Prifysgol Cymru
- :George Vaughan Maddox
- :Gorsedd stones
- :Government of Wales Act 1998
- :Government of Wales Act 2006
- :Great Little Trains of Wales
- :Gwent (county)
- :Gwilym ap Tudur
- :Gwyn Nicholls
- :Gwyn Thomas (poet)
- :Harry Secombe
- :Hedd Wyn
- :Hiraeth
- :Honourable Society of Cymmrodorion
- :Hywel Dda
- :Ieuan Wyn Jones
- :Industrial Revolution in Wales
- :John Ceiriog Hughes
- :Ken Follett
- :KeolisAmey Wales
- :Kingdom of Dyfed
- :Kingdom of Gwent
- :Kyffin Williams
- :Laura Ashley (company)
- :Llanelli riots of 1911
- :Llywelyn ap Gruffydd Fychan
- :Local government in Wales
- :Lovespoon
- :Manufacturing in Wales
- :Marle Hall
- :Merionethshire
- :Merthyr Rising
- :Monarchy of the United Kingdom
- :Monmouth Regimental Museum
- :Montgomeryshire
- :National Museum Cardiff
- :National Theatre Wales
- :National symbols of Wales
- :Newport Cathedral
- :Newport Rising
- :Nonconformity in Wales
- :Norman invasion of Wales
- :Owain Gwynedd
- :Pembrokeshire Coast National Park
- :Port Talbot Steelworks
- :Preserved counties of Wales
- :Primary education in Wales
- :R. Williams Parry
- :Rhodri Morgan
- :Rhys ap Tudur
- :Richard Wilson (painter)
- :River Taff
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- :Robert ap Huw
- :Royal Badge of Wales
- :Royal Welsh
- :Royal Welsh College of Music & Drama
- :Rugby league in Wales
- :Secondary education in Wales
- :Secretary of State for Wales
- :Seven Wonders of Wales
- :Sheep farming in Wales
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- :South East Wales
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- :South West Wales
- :St Asaph Cathedral
- :St David's Day Agreement
- :St Fagans National Museum of History
- :St Giles' Church, Wrexham
- :Statute of Rhuddlan
- :Swansea.com Stadium
- :T. H. Parry-Williams
- :T. Llew Jones
- :Television in Wales
- :Theatr Genedlaethol Cymru
- :Tourism in Wales
- :Traditional festival days of Wales
- :University Hospital of Wales
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- :Waldo Williams
- :Wales A national rugby league team
- :Wales Act 2014
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- :Wales Office
- :Wales Rugby League
- :Wales TUC
- :Wales in the Middle Ages
- :Wales in the early Middle Ages
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- :Welch Regiment
- :Well-being of Future Generations (Wales) Act 2015
- :Welsh-medium education
- :Welsh 3000s
- :Welsh Artist of the Year
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- :Western Mail (Wales)
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- :10th century in Wales
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- :1700s in Wales
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- :1730s in Wales
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- :1733 in Wales
- :1734 in Wales
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- :1738 in Wales
- :1739 in Wales
- :1740s in Wales
- :1750s in Wales
- :1760s in Wales
- :1770 in Wales
- :1770s in Wales
- :1771 in Wales
- :1772 in Wales
- :1773 in Wales
- :1774 in Wales
- :1775 in Wales
- :1776 in Wales
- :1777 in Wales
- :1778 in Wales
- :1779 in Wales
- :1780 in Wales
- :1781 in Wales
- :1782 in Wales
- :1783 in Wales
- :1784 in Wales
- :1785 in Wales
- :1786 in Wales
- :1787 in Wales
- :1788 in Wales
- :1789 in Wales
- :1790 in Wales
- :1791 in Wales
- :1792 in Wales
- :1793 in Wales
- :1794 in Wales
- :1795 in Wales
- :1796 in Wales
- :1797 in Wales
- :1798 in Wales
- :1799 in Wales
- :1800 in Wales
- :1800s in Wales
- :1801 in Wales
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- :1810 in Wales
- :1810s in Wales
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- :1817 in Wales
- :1818 in Wales
- :1819 in Wales
- :1820 in Wales
- :1820s in Wales
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- :1822 in Wales
- :1823 in Wales
- :1824 in Wales
- :1825 in Wales
- :1826 in Wales
- :1827 in Wales
- :1828 in Wales
- :1829 in Wales
- :1830 in Wales
- :1830s in Wales
- :1831 in Wales
- :1832 in Wales
- :1833 in Wales
- :1834 in Wales
- :1835 in Wales
- :1836 in Wales
- :1837 in Wales
- :1838 in Wales
- :1839 in Wales
- :1840 in Wales
- :1840s in Wales
- :1841 in Wales
- :1842 in Wales
- :1843 in Wales
- :1844 in Wales
- :1845 in Wales
- :1846 in Wales
- :1847 in Wales
- :1848 in Wales
- :1849 in Wales
- :1850 in Wales
- :1850s in Wales
- :1851 in Wales
- :1852 in Wales
- :1853 in Wales
- :1854 in Wales
- :1855 in Wales
- :1856 in Wales
- :1857 in Wales
- :1858 in Wales
- :1859 in Wales
- :1860 in Wales
- :1860s in Wales
- :1861 in Wales
- :1862 in Wales
- :1863 in Wales
- :1864 in Wales
- :1865 in Wales
- :1866 in Wales
- :1867 in Wales
- :1868 in Wales
- :1869 in Wales
- :1870 in Wales
- :1870s in Wales
- :1871 in Wales
- :1872 in Wales
- :1873 in Wales
- :1874 in Wales
- :1875 in Wales
- :1876 in Wales
- :1877 in Wales
- :1878 in Wales
- :1879 in Wales
- :1880 in Wales
- :1880s in Wales
- :1881 in Wales
- :1882 in Wales
- :1883 in Wales
- :1884 in Wales
- :1885 in Wales
- :1886 in Wales
- :1887 in Wales
- :1888 in Wales
- :1889 in Wales
- :1890 in Wales
- :1890s in Wales
- :1891 in Wales
- :1892 in Wales
- :1893 Home Nations Championship
- :1893 in Wales
- :1894 in Wales
- :1895 in Wales
- :1896 in Wales
- :1897 in Wales
- :1898 in Wales
- :1899 in Wales
- :1900 Home Nations Championship
- :1900 in Wales
- :1901 in Wales
- :1902 Home Nations Championship
- :1902 in Wales
- :1903 in Wales
- :1905 in Wales
- :1906 Swansea earthquake
- :1906 in Wales
- :1908 Home Nations Championship
- :1908 in Wales
- :1909 Home Nations Championship
- :1909 in Wales
- :1910 in Wales
- :1911 in Wales
- :1912 in Wales
- :1913 in Wales
- :1914 in Wales
- :1915 in Wales
- :1916 in Wales
- :1917 in Wales
- :1918 in Wales
- :1919 in Wales
- :1920 in Wales
- :1921 in Wales
- :1922 in Wales
- :1923 in Wales
- :1924 in Wales
- :1925 in Wales
- :1926 in Wales
- :1927 in Wales
- :1928 in Wales
- :1929 in Wales
- :1930 in Wales
- :1931 in Wales
- :1932 in Wales
- :1933 in Wales
- :1934 in Wales
- :1935 in Wales
- :1936 in Wales
- :1937 in Wales
- :1938 in Wales
- :1939 in Wales
- :1940 in Wales
- :1941 in Wales
- :1943 in Wales
- :1944 in Wales
- :1946 in Wales
- :1947 in Wales
- :1948 in Wales
- :1949 in Wales
- :1950 in Wales
- :1951 in Wales
- :1952 in Wales
- :1953 in Wales
- :1954 in Wales
- :1955 in Wales
- :1956 in Wales
- :1957 in Wales
- :1958 in Wales
- :1959 in Wales
- :1960 in Wales
- :1962 in Wales
- :1963 in Wales
- :1964 in Wales
- :1965 in Wales
- :1966 in Wales
- :1967 in Wales
- :1969 in Wales
- :1970 in Wales
- :1971 in Wales
- :1972 in Wales
- :1975 in Wales
- :1977 in Wales
- :1978 in Wales
- :1979 in Wales
- :1980 Welsh Cup final
- :1980 in Wales
- :1981 in Wales
- :1982 in Wales
- :1983 in Wales
- :1984 in Wales
- :1985 in Wales
- :1995 Welsh Open (snooker)
- :1999 National Assembly for Wales election
- :2000 Welsh Cup final
- :2001 Welsh Open (snooker)
- :2002 Welsh Open (snooker)
- :2003 National Assembly for Wales election
- :2003 Welsh Open (snooker)
- :2004 Welsh Open (snooker)
- :2005 Welsh Open (snooker)
- :2006 Welsh Open (snooker)
- :2006–07 Celtic League
- :2007–08 Celtic League
- :2008 Welsh Open (snooker)
- :2008 in Wales
- :2008–09 Celtic League
- :2009–10 Celtic League
- :2010 Ryder Cup
- :2010 in Wales
- :2010–11 Celtic League
- :2011 National Assembly for Wales election
- :2011 Welsh Open (snooker)
- :2011 in Wales
- :2012 Welsh Open (snooker)
- :2013 Swansea measles epidemic
- :2013 Welsh Open (snooker)
- :2014 Welsh Open (snooker)
- :2014 in Wales
- :2014–15 Cardiff City F.C. season
- :2014–15 Swansea City A.F.C. season
- :2014–15 Welsh Football League Division One
- :2014–15 Welsh League Cup
- :2015 Welsh Open (snooker)
- :2015 in Wales
- :2015–16 Cardiff City F.C. season
- :2016 Welsh Open (snooker)
- :2016–17 Cardiff City F.C. season
- :2018–19 Scarlets season
- :2021–22 Adran Premier
- :2022–23 Adran Premier
- :56 Group Wales
- :9th century in Wales
- :A48(M) motorway
- :A487 road
- :A48 road
- :A55 road
- :A History of Monmouthshire from the Coming of the Normans into Wales down to the Present Time
- :A History of Wales (book)
- :Aberaeron
- :Aberavon
- :Aberavon RFC
- :Aberbargoed
- :Abercarn colliery disaster
- :Abercraf English
- :Aberdare Community School
- :Aberdare Urban District
- :Aberdyfi Castle
- :Abergavenny Bridge
- :Abergavenny Castle
- :Abergavenny Museum
- :Aberglaslyn Pass
- :Abernant Colliery
- :Abertillery
- :Aberystwith and Welsh Coast Railway
- :Aberystwyth Town Council
- :Act of Senedd Cymru
- :Adam Jones (rugby union, born 1980)
- :Aeddan ap Blegywryd
- :Afan Forest Park
- :Afanc
- :Afon Glaslyn
- :Afon Lwyd
- :Afon Mawddach
- :Afon Ogwen
- :Afon Rheidol
- :Afon Tryweryn
- :Alan Curtis (footballer)
- :Alan Jones (cricketer, born 1938)
- :Alan Llwyd
- :Alan Thompson (broadcaster)
- :Alexandra Roach
- :Alfred Thomas, 1st Baron Pontypridd
- :All Wales Convention
- :All Wales Ethnic Minority Association
- :Alun Lewis (poet)
- :Alwyn Rice Jones
- :Amman Valley Railway
- :Amy Hawkins
- :Amy Wadge
- :And death shall have no dominion
- :Andrew Green (librarian)
- :Andrew Howard
- :Aneurin Bevan University Health Board
- :Angela Burns
- :Angharad James-Turner
- :Angharad Mair
- :Angle Peninsula Coast
- :Anglesey Coastal Path
- :Angus McBean
- :Anna Hursey
- :Aran Fawddwy
- :Archdruid
- :Arenigs
- :Arfon (cantref)
- :Arfon transmitting station
- :Arthur Owen Vaughan
- :Arthur Pearson (British politician)
- :Arthur Probert
- :Artie Moore
- :Arwel Hughes
- :Arwyn Davies
- :Asian Welsh people
- :Athletics in Wales
- :Athrwys ap Meurig
- :Atlantic Wharf
- :Aubrey Trotman-Dickenson
- :Audit Wales
- :B4329 road
- :BBC 2W
- :BBC Cymru Wales New Broadcasting House
- :BBC Radio Cymru 2
- :Baglan, Neath Port Talbot
- :Baked Bean Museum of Excellence
- :Bala, Gwynedd
- :Bala-Bangor Theological Seminary
- :Bala Lake
- :Bala and Festiniog Railway
- :Bangor and Carnarvon Railway
- :Baptist Union of Wales
- :Bara brith
- :Barmouth
- :Barn (Welsh magazine)
- :Barry Castle
- :Barry John (artist)
- :Barry Railway Company
- :Barry Tourist Railway
- :Basketball Wales
- :Bassaleg
- :Battle of Bryn Glas
- :Battle of Crogen
- :Battle of Crug Mawr
- :Battle of Mynydd Carn
- :Beaumaris
- :Beaumaris Pier
- :Beddgelert
- :Behnaz Akhgar
- :Berwyn Mountain UFO incident
- :Beth Robert
- :Beth Winter
- :Bethan James
- :Bethesda, Gwynedd
- :Betsi Cadwaladr University Health Board
- :Betws-y-Coed (electoral ward)
- :Bible translations into Welsh
- :Bishop of Bangor
- :Bishop of Llandaff
- :Bishop of Monmouth
- :Bishop of St Asaph
- :Bishop of St Davids
- :Bishop of Swansea and Brecon
- :Black Welsh people
- :Blackmill
- :Blaenau Ffestiniog railway station
- :Bleddyn Bowen
- :Bleddyn Williams
- :Bleddyn ap Cynfyn
- :Bobi Jones
- :Brackla
- :Branwen
- :Brecknockshire Agricultural Society
- :Brecon Beacons Food Festival
- :Brecon Cathedral
- :Brecon Jazz Festival
- :Brecon Mountain Railway
- :Brecon and Merthyr Tydfil Junction Railway
- :Brian Price (rugby union)
- :Bridgend (community)
- :Bridgend County Borough Council
- :Bridgend Designer Outlet
- :Bridgend Ravens
- :Britannia
- :British Steel (1967–1999)
- :British narrow-gauge slate railways
- :Brochwel Ysgithrog
- :Bronllys Hospital
- :Brut y Brenhinedd
- :Brychan
- :Brycheiniog
- :Brymbo Steelworks
- :Bryn Bras Castle
- :Bryn Celli Ddu
- :Brynglas
- :Brynle Williams
- :Brynley F. Roberts
- :Brynmawr and Blaenavon Railway
- :Buddug Williams
- :Buffy Williams
- :Bulwark, Chepstow
- :Burry Port
- :Burry Port and Gwendraeth Valley Railway
- :Butetown branch line
- :Bwllfa Colliery
- :C. W. L. Bevan
- :CAF Newport
- :Cabinet Secretary for Education (Wales)
- :Cabinet Secretary for Finance (Wales)
- :Cabinet Secretary for Health and Social Care (Wales)
- :Cadwaladr ap Gruffydd
- :Cadwallon Lawhir ap Einion
- :Cadwallon ap Madog
- :Caerleon
- :Caerleon Arts Festival
- :Caerphilly
- :Caerphilly railway works
- :Caerwent
- :Calan Gaeaf
- :Calan Mai
- :Caldicot Castle
- :Calennig
- :Cambriae Typus
- :Cambrian Archaeological Association
- :Cambrian News
- :Cambrian Way
- :Campaign for the Protection of Rural Wales
- :Canolfan Tryweryn
- :Cantre'r Gwaelod
- :Cantref
- :Capel House
- :Capital South Wales
- :Caradog ap Gruffydd
- :Cardiff Arms Park Male Choir
- :Cardiff Business School
- :Cardiff City Council
- :Cardiff County Borough Council
- :Cardiff Gate
- :Cardiff International Pool
- :Cardiff International Sports Stadium
- :Cardiff Metropolitan Cathedral
- :Cardiff Queen Street railway station
- :Cardiff and Vale University Health Board
- :Cardigan, Ceredigion
- :Cardigan Bay Special Area of Conservation
- :Cardigan Castle
- :Cardigan Lifeboat Station
- :Cardigan Priory
- :Cardiganshire County Council
- :Carew Cross
- :Cariad@iaith:love4language
- :Carmarthen Bay
- :Carmarthen Castle
- :Carmarthen West and South Pembrokeshire (UK Parliament constituency)
- :Carmarthen and Cardigan Railway
- :Carn Menyn
- :Carnarvon and Llanberis Railway
- :Carnarvonshire Railway
- :Carnedd Dafydd
- :Carneddau
- :Carolyn Thomas
- :Castell Dinas
- :Castlemartin Training Area
- :Cathays railway works
- :Cefn Coed Colliery Museum
- :Cefn Golau
- :Cefn y Brithdir
- :Ceiriog Valley
- :Celtic Warriors
- :Celtic studies
- :Centre for Alternative Technology
- :Cerdd dafod
- :Charles James Jackson
- :Charlotte Price White
- :Chaz Davies
- :Chepstow Racecourse
- :Chief Executive and Clerk of the Senedd
- :Chirk
- :Chirk Aqueduct
- :Chirk Castle
- :Chris Bryant
- :Chris Gunter
- :Chris Marustik
- :Christine James
- :Christmas Evans
- :Christopher Painter
- :Church of St Aeddan, Bettws Newydd
- :Cilgerran
- :Cistercian Way (Wales)
- :City Bridge
- :City Hall, Cardiff
- :Clas (ecclesiastical settlement)
- :Clement Davies
- :Cliff Curvis
- :Clwydian Range
- :Clydach Vale
- :Clynnog Fawr
- :Clywedog Reservoir
- :Cnapan
- :Cockett (electoral ward)
- :Coed-y-Brenin
- :Coel Hen
- :Cogan, Vale of Glamorgan
- :Coity
- :Coity Castle
- :Colorama (band)
- :Colwyn Bay
- :Communities First
- :Connah's Quay
- :Conwy
- :Conwy County Borough Council
- :Cornwall House
- :Cosmeston Lakes Country Park
- :Cosmeston Medieval Village
- :Council for Wales and Monmouthshire
- :Council of Wales and the Marches
- :Counsel General for Wales
- :Countryside Council for Wales
- :County Police Act 1839
- :Court of Great Sessions in Wales
- :Cowbois Rhos Botwnnog
- :Cowbridge
- :Coychurch Higher
- :Coychurch Lower
- :Crib Goch
- :Cricket in Wales
- :Crickhowell
- :Cross Keys RFC
- :Cross of Neith
- :Crown Buildings, Cathays Park
- :Crowning of the Bard
- :Cultural relationship between the Welsh and the English
- :Culture of Gwynedd during the High Middle Ages
- :Cunedda
- :Curriculum Council for Wales
- :Cwm Idwal
- :Cwm Taf Morgannwg University Health Board
- :Cwmbwrla (electoral ward)
- :Cwmhir Abbey
- :Cwmhiraeth
- :Cymmer, Neath Port Talbot
- :Cymreigyddion Society
- :Cymru Alliance
- :Cymru Fydd
- :Cymuned
- :Cynddelw Brydydd Mawr
- :Cynddylan
- :Cyngen ap Cadell
- :Cynllibiwg
- :Cynog Dafis
- :Cynon Valley
- :Cân i Gymru
- :Cân i Gymru 2009
- :Cân i Gymru 2010
- :Cân i Gymru 2011
- :Côr Godre'r Aran
- :D. J. Williams (Welsh nationalist)
- :Dafydd ab Edmwnd
- :Daniel Evans (Welsh poet)
- :Daniel Huws
- :Danielle Bux
- :Danny Thomas (footballer, born 1985)
- :Darren Millar
- :Dave Bowen
- :Dave Edmunds
- :David Brunt
- :David Brynmor Jones
- :David Davies (swimmer)
- :David Evans-Bevan
- :David Griffiths (missionary)
- :David Jones (missionary)
- :David Jones (painter)
- :David Lloyd (Welsh politician)
- :David Lyn
- :David Richards (motorsport executive)
- :David Thomas (industrialist)
- :David Wynne (composer)
- :Dean Saunders
- :Deganwy
- :Deian Hopkin
- :Delme Bowen
- :Denbigh
- :Denbighshire County Council
- :Dennis Coslett
- :Desmond Barry
- :Development Bank of Wales
- :Devil's Bridge, Ceredigion
- :Dewi Bebb
- :Dictionary of Welsh Biography
- :Dill Jones
- :Dinas Emrys
- :Dinefwr Castle
- :Dinerth Castle
- :Dingestow Court
- :Diocese of Llandaff
- :Diocese of Monmouth
- :Diocese of St Asaph
- :Diocese of St Davids
- :Diocese of Swansea and Brecon
- :District of Alyn and Deeside
- :District of Arfon
- :District of Cardiff
- :District of Delyn
- :District of Llanelli
- :District of Montgomeryshire
- :District of Newport
- :District of Port Talbot
- :District of Rhondda
- :District of Rhuddlan
- :District of Rhymney Valley
- :District of Swansea
- :Dolforwyn Castle
- :Draethen
- :Dre-fach Felindre
- :Druid's Prayer
- :Druids F.C.
- :Dryslwyn Castle
- :Dunvant and Killay
- :Dyfed-Powys Police
- :Dyffryn Mymbyr
- :Dyffryn Ogwen
- :Dyfi Furnace
- :Dyfodol i'r Iaith
- :Dylan Jones-Evans
- :Dylan Thomas Boathouse
- :Dylan Thomas Centre
- :EMRTS Cymru
- :Earl of Lisburne
- :Ebbw Vale Garden Festival
- :Economy of Swansea
- :Eddie Parris
- :Eddie Thomas (boxer)
- :Edward Charlton, 5th Baron Charlton
- :Edward George Bowen
- :Edward Lhuyd
- :Edward Williams (iron-master)
- :Eileen Beasley
- :Elan Closs Stephens
- :Elan aqueduct
- :Elen Egryn
- :Elffin ap Gwyddno
- :Elin Fflur
- :Elin Manahan Thomas
- :Elinor Bennett
- :Elis Gruffydd
- :Elizabeth Andrews
- :Elwyn Davies
- :Emlyn Williams (trade unionist)
- :Encyclopaedia Cambrensis
- :Energy in Wales
- :English family law
- :English property law
- :Environment (Wales) Act 2016
- :Environment Agency Wales
- :Epynt clearance
- :Eric Malthouse
- :Evan Vincent Evans
- :Evangelical Movement of Wales
- :Ewenny
- :Ewenny Priory
- :Expert witnesses in English law
- :Extreme points of Wales
- :FA Cup Final
- :Fair Tax Town
- :Fan Dance (exercise)
- :Felinfoel Brewery
- :Ferndale, Rhondda Cynon Taf
- :Ffestiniog
- :Ffordd Pen Llech
- :Ffred Ffransis
- :First Cymru
- :First Minister's Questions
- :Fishguard
- :Fishguard Bay
- :Flag of Caernarfonshire
- :Flag of Flintshire
- :Flag of Glamorgan
- :Flag of Monmouthshire
- :Flag of Montgomeryshire
- :Flag of Saint David
- :Flintshire Coalfield
- :Foel Cwmcerwyn
- :Football Association of Wales
- :Football in Wales
- :Fourteen Locks
- :Francis Homfray
- :Frank Hennessy
- :Fred Hando
- :Free Wales Army
- :Friars Walk, Newport
- :Funky Dragon
- :Gareth Gwenlan
- :Gareth Williams, Baron Williams of Mostyn
- :Garrod Thomas
- :Garth Pier
- :Gavin Henson
- :Geoff Lewis
- :Geology of Monmouthshire
- :Geology of Pembrokeshire
- :Geology of South Wales
- :George Edwards (Welsh footballer)
- :George Owen of Henllys
- :George Trefgarne, 1st Baron Trefgarne
- :Georgia Davies
- :Georgia Ruth
- :Gildas
- :Girlguiding Cymru
- :Glamorgan County Cricket Club
- :Glamorgan Heritage Coast
- :Glan Clwyd Hospital
- :Glan Conway Rural District
- :Glanmor Williams
- :Gleision Colliery mining accident
- :Global Centre of Rail Excellence
- :Glyder Fawr
- :Glyn Davies (politician)
- :Glyn Jones (Welsh writer)
- :Glyndŵr
- :Glyndŵr's Way
- :Glynneath
- :Glywys
- :Glywysing
- :God Bless the Prince of Wales
- :Gododdin
- :Golf in Wales
- :Gomer Press
- :Goodwick
- :Gordon Parry, Baron Parry
- :Gorky's Zygotic Mynci
- :Goronwy ab Ednyfed
- :Gorseinon
- :Gowerton (electoral ward)
- :Grace Dieu Abbey, Monmouth
- :Granville Beynon
- :Greg Davies
- :Gregory Cameron
- :Gregynog Press
- :Gren
- :Griffith Jones (priest)
- :Gruffudd Leiaf
- :Gruffydd ap Gwenwynwyn
- :Gruffydd ap Llywelyn
- :Gruffydd ap Rhydderch
- :Gruffydd ap Rhys II
- :Grŵp Llandrillo Menai
- :Gudwal
- :Gwalia Stores
- :Gwallter Mechain
- :Gweith Gwen Ystrat
- :Gwenllian ferch Gruffydd
- :Gwenllian of Wales
- :Gwent County History
- :Gwent Healthcare NHS Trust
- :Gwent Police
- :Gwyneddigion Society
- :Gwynfynydd Gold Mine
- :Gŵyl Fair y Canhwyllau
- :Hafan y Môr
- :Hafotty
- :Hanes Taliesin
- :Harry Davies (politician)
- :Harry Llewellyn
- :Haverfordwest
- :Haverfordwest (UK Parliament constituency)
- :Hawarden Airport
- :Hay Festival
- :Heno
- :Herbert Merrett
- :Herbert Wilson
- :Hereford, Hay and Brecon Railway
- :High Sheriff of Brecknockshire
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- :High Sheriff of Gwent
- :High Sheriff of Mid Glamorgan
- :High Sheriff of Radnorshire
- :High Sheriff of South Glamorgan
- :High Sheriff of West Glamorgan
- :Hinduism in Wales
- :Historic counties of Wales
- :History of Swansea
- :History of local government in Wales
- :History of rugby union matches between Fiji and Wales
- :History of the Jews in Wales
- :Hits Radio South Wales
- :Holt Castle
- :Holyhead
- :House of Dinefwr
- :House of Mathrafal
- :Housing and construction in Wales
- :How Green Was My Valley
- :How Green Was My Valley (film)
- :Howard Winstone
- :Howell Harris
- :Hugh Griffith
- :Hugh Owen Thomas
- :Hughes of Gwerclas
- :Humphrey Llwyd
- :Hundred Years' War, 1337–1360
- :Hundred Years' War, 1369–1389
- :Hundred Years' War, 1415–1453
- :Huw Ceredig
- :Huw Irranca-Davies
- :Huw Jenkins (Welsh businessman)
- :Ian "H" Watkins
- :Ian Walsh (footballer)
- :Ian Watkins (rugby union)
- :Ice Arena Wales
- :Ifan ab Owen Edwards
- :Ifor Williams
- :Illtud
- :In These Stones Horizons Sing
- :Invasions of the British Isles
- :Investiture of Edward, Prince of Wales
- :Iorwerth ap Bleddyn
- :Irene Steer
- :Isaac Roberts
- :Isca Augusta
- :Islam in Wales
- :Isle of Anglesey County Council
- :Islwyn
- :Itinerarium Cambriae
- :Ivor Williams
- :Jack Kelsey
- :Jack Matthews (rugby union)
- :Jackson Hall, Cardiff
- :Jacqui Gasson
- :James Dean Bradfield
- :Jamie Baulch
- :Jamie Donaldson
- :Janet Finch-Saunders
- :Jean McFarlane, Baroness McFarlane of Llandaff
- :Jeff Banks
- :Jemima Nicholas
- :Jeremiah Homfray
- :Jerry Shea
- :Jim Driscoll
- :Jim Griffiths
- :Jimmy Murphy (footballer)
- :Joan, Lady of Wales
- :Joanna Page
- :John Davies (bishop of St Asaph)
- :John Disley
- :John Edward Lloyd
- :John Elias
- :John Evan Thomas
- :John Frost (Chartist)
- :John Geoffrey Jones
- :John Gwilym Jones
- :John Hanbury (1664–1734)
- :John Jones, Talysarn
- :John Jones (Carmarthenshire MP)
- :John Knapp-Fisher
- :John Nicholl (judge)
- :John Ormond
- :John Owen (Bishop of St Davids)
- :John Rhŷs
- :John Williams (Ab Ithel)
- :Johnny Basham
- :Jones (surname)
- :Jones Jones Jones
- :Joseph Morewood Staniforth
- :Joseph Turner (architect)
- :Joshua Anderson Hague
- :Julian Hodge
- :Julie Williams (scientist)
- :Justinian of Ramsey Island
- :Karl Francis
- :Katheryn of Berain
- :Keep Wales Tidy
- :Keith Davies
- :Keith Rowlands
- :Ken Skates
- :Kidwelly
- :Kidwelly Castle
- :King of Wales
- :Kingdom of Ceredigion
- :Kingdom of Morgannwg
- :Korfball in Wales
- :La Charrette
- :Lake Vyrnwy
- :Lake Vyrnwy Straining Tower
- :Laleston
- :Lammas Ecovillage
- :Lampeter
- :Landore (electoral ward)
- :Landsker Line
- :Langstone, Newport
- :Laugharne
- :Laura Anne Jones
- :Laura McAllister
- :Lee Congerton
- :Leeswood Hall
- :Legislative Competence Order
- :Leighton Andrews
- :List of Welsh Nobel laureates
- :List of habitats of principal importance in Wales
- :List of villages in Gower
- :Literary Welsh morphology
- :Literature Wales
- :Little England beyond Wales
- :Liverpool and North Wales Steamship Company
- :Llan (placename)
- :Llanberis
- :Llanberis Pass
- :Llancaiach Branch
- :Llandaff and Barry (UK Parliament constituency)
- :Llandarcy Oil Refinery
- :Llanddewi Brefi
- :Llandeilo
- :Llandissilio
- :Llandovery
- :Llandudno
- :Llandudno Junction
- :Llandysul
- :Llanfair Caereinion
- :Llanfairfechan
- :Llanfairpwll railway station
- :Llanfyllin Branch
- :Llangefni
- :Llangeitho
- :Llangollen
- :Llangollen International Musical Eisteddfod
- :Llangollen Railway
- :Llangorse Lake
- :Llangynwyd Lower
- :Llangynwyd Middle
- :Llanharry
- :Llanidloes
- :Llanidloes and Newtown Railway
- :Llanover House
- :Llanrwst
- :Llansteffan Castle
- :Llantrisant
- :Llanwddyn
- :Llanwern
- :Llanwern steelworks
- :Llanwrtyd Wells
- :Llanybydder
- :Llanymynech railway station
- :Llyn Brenig
- :Llyn Brianne
- :Llyn Celyn
- :Llyn Cowlyd
- :Llyn y Fan Fach
- :Llyr Gruffydd
- :Llywarch Hen
- :Llywelyn's coronet
- :Llywelyn ap Seisyll
- :Llywydd of the Senedd
- :Local health board
- :London Welsh Centre
- :Lord Lieutenant of Wales
- :Lordship of Brecknock
- :Lordship of Glamorgan
- :Loughor
- :Lower Dock Street drill hall, Newport
- :Lucy Owen
- :Luke Charteris
- :Lunacy Act 1845
- :Lyn Evans
- :M. S. Factory, Valley
- :M4 corridor
- :MV Sea Empress
- :Mach Loop
- :Madeleine Moon
- :Maenan Abbey
- :Maerdy Branch
- :Maesteg Line
- :Magor with Undy
- :Mansel family
- :Manuscripts of Wales
- :Marble Church, Bodelwyddan
- :Maredudd ap Bleddyn
- :Margam
- :Margam Castle
- :Margam Country Park
- :Margaret Tisdale
- :Marged ferch Ifan
- :Maria Jane Williams
- :Market Hall, Monmouth
- :Mary Wynne Warner
- :Mathrafal
- :Maurice Turnbull
- :Mawr
- :Measure of the National Assembly for Wales
- :Media of Wales
- :Meena Upadhyaya
- :Megan Lloyd George
- :Meibion Glyndŵr
- :Meirionnydd
- :Melingriffith Tin Plate Works
- :Member of the Senedd
- :Members of the 1st National Assembly for Wales
- :Members of the 3rd National Assembly for Wales
- :Menai Bridge
- :Menna Elfyn
- :Mererid Hopwood
- :Merthyr (UK Parliament constituency)
- :Merthyr Tramroad
- :Merthyr line
- :Mervyn Davies (rugby union)
- :Meurig ap Tewdrig
- :Michael Gustavius Payne
- :Mickey Thomas (footballer)
- :Mid-Wales Railway
- :Mid Glamorgan County Council
- :Mid Wales Hospital
- :Minffordd railway station
- :Miss Wales
- :Moelwyn Merchant
- :Mohammad Asghar
- :Monmouth Alms Houses
- :Monmouth Heritage Trail
- :Monmouthshire Beacon
- :Monmouthshire Houses
- :Montgomery, Powys
- :Montgomery Castle
- :Mordecai Jones
- :Morgan Lloyd
- :Morgraig Castle
- :Morriston
- :Morriston (electoral ward)
- :Morriston Hospital
- :Mountain Ash, Rhondda Cynon Taf
- :Mountain rescue in Wales
- :Mounton House
- :Mudiad Meithrin
- :Mumbles
- :Music Theatre Wales
- :Music of Cardiff
- :Mynydd-bach (electoral ward)
- :Mynydd Epynt
- :Mynydd Llangatwg
- :NHS Direct Wales
- :Nant Ffrancon Pass
- :Nant Gwynant
- :Nantlle Railway
- :Natasha Asghar
- :Nathan Rogers (writer)
- :Nation Radio Wales
- :National Curriculum for Wales (2008–2026)
- :National Roman Legion Museum
- :National Slate Museum
- :National Waterfront Museum
- :National Wool Museum
- :National Youth Orchestra of Wales
- :Natural Resources Wales
- :Neath
- :Nefyn
- :Neil Edwards (footballer, born 1970)
- :Nelson Garden
- :Ness Edwards
- :Nest ferch Cadell
- :Nest ferch Rhys
- :New Inn
- :New Quay
- :New Tredegar
- :Newcastle Emlyn
- :Newcastle Emlyn Castle
- :Newport, Abergavenny and Hereford Railway
- :Newport Castle
- :Newport Civic Centre
- :Newport Docks
- :Newport International Sports Village
- :Newport Museum
- :Newport RFC
- :Newport Transporter Bridge
- :Newport built-up area
- :Newtown, Powys
- :Newtown and Machynlleth Railway
- :Neyland
- :Nick Ainger
- :Nick Ramsay
- :Nicky Wire
- :Nicole Cooke
- :Non-Registered Intermediary
- :Non Evans
- :Norah Isaac
- :North East Wales
- :North East Wales NHS Trust
- :North Monmouthshire (UK Parliament constituency)
- :North Wales Coalfield
- :North Wales Medical School
- :North Wales Police
- :Oakdale, Caerphilly
- :Offa's Dyke Path
- :Office for the Welsh Legislative Counsel
- :Official Harpist to the Prince of Wales
- :Ogmore-by-Sea
- :Ogmore Castle
- :Ogof Craig a Ffynnon
- :Ogof Ffynnon Ddu
- :Ogof y Daren Cilau
- :Old College, Aberystwyth
- :Old Colwyn
- :Old Market Hall, Llanidloes
- :Old Welsh
- :One Wales
- :Osi Rhys Osmond
- :Osian Ellis
- :Oswestry, Ellesmere and Whitchurch Railway
- :Oswestry and Newtown Railway
- :Otter Hole
- :Our Lady of Cardigan
- :Overton-on-Dee
- :Owain Glyndŵr's Parliament House
- :Owain Goch ap Gruffydd
- :Owain ap Cadwgan
- :Owain mab Urien
- :Owen Money
- :Owen Morgan Edwards
- :Owen Sheers
- :Owen Thomas Jones
- :Oystermouth
- :Oystermouth Castle
- :PD Ports
- :PS Rothsay Castle (1816)
- :Padarn
- :Pan-Celticism
- :Parc y Scarlets
- :Parys Mountain
- :Patagonian Welsh
- :Patent Fuel
- :Paul Parry
- :Pembrey
- :Pembrey Sands Air Weapons Range
- :Pembroke Castle
- :Pembroke Dockyard
- :Pembroke Power Station
- :Pembroke and Haverfordwest (UK Parliament constituency)
- :Pembrokeshire Coalfield
- :Pembrokeshire County Council
- :Pen-y-Pass
- :Pen y Fan
- :Penarth Pier
- :Pencoed
- :Penderry
- :Pendrill Charles Varrier-Jones
- :Penllergaer (electoral ward)
- :Penllyn Castle
- :Penmaenmawr
- :Pennal Letter
- :Pennard (electoral ward)
- :Penrhyn quarry
- :Penscynor Wildlife Park
- :Penydarren Ironworks
- :Penysarn
- :Peter's Food Services
- :Peter Nicholas (footballer)
- :Peter Prendergast (artist)
- :Peter Smith (architectural historian)
- :Peterston-super-Ely
- :Philip Madoc
- :Pibgorn (instrument)
- :Pierhead Building
- :Pill Priory
- :Pillgwenlly
- :Pistyll Rhaeadr
- :Plaid Ifanc
- :Pobol y Cwm
- :Pontarddulais
- :Pontyclun
- :Pontypool
- :Pontypool, Caerleon and Newport Railway
- :Pontypool (UK Parliament constituency)
- :Pontypool RFC
- :Pontypridd
- :Pontypridd Urban District Council
- :Port Talbot English
- :Port Talbot Parkway railway station
- :Port Talbot Railway and Docks Company
- :Porth
- :Porth Teigr
- :Porth yr Ogof
- :Porthcawl
- :Portskewett
- :Powys Archives
- :Powys County Council
- :Powys Fadog
- :Powys Wenwynwyn
- :Presbyterian Church of Wales
- :Preseli Pembrokeshire
- :Preseli Pembrokeshire (UK Parliament constituency)
- :President of Welsh Tribunals
- :Presteigne
- :Presteigne Festival
- :Prince of Wales Orthopaedic Hospital, Rhydlafar
- :Princes Gate Spring Water
- :Princess Lilian, Duchess of Halland
- :Principality Building Society
- :Priory Gatehouse, Usk
- :Prisons in Wales
- :Public Health Wales
- :Pwllheli
- :Pwyll Pendefig Dyfed
- :Qualifications Wales
- :R. Silyn Roberts
- :RAF Carew Cheriton
- :RAF Fairwood Common
- :RAF Hell's Mouth
- :RAF Llandow
- :RAF Manorbier
- :RAF Valley
- :RNAD Trecwn
- :RNMD Milford Haven
- :Racecourse Ground
- :Rachel's Organic
- :Rachel Roberts (actress)
- :Rachel Trezise
- :Railway stations in Newport
- :Ramsey Island
- :Ray Williams (rugby union coach)
- :Raymond Davies Hughes
- :Real Crisps
- :Rebecca Evans (politician)
- :Red Bandits of Mawddwy
- :Red Lady of Paviland
- :Redvers Sangoe
- :Rees Llewellyn
- :Register of Landscapes of Historic Interest in Wales
- :Rex Willis
- :Rhodri Owen
- :Rhodri ab Owain Gwynedd
- :Rhondda Cynon Taf County Borough Council
- :Rhondda line
- :Rhoose Cardiff International Airport railway station
- :Rhos, Neath Port Talbot
- :Rhos (North Wales)
- :Rhossili
- :Rhufoniog
- :Rhwng Gwy a Hafren
- :Rhydderch Hael
- :Rhydderch ap Iestyn
- :Rhydwen Williams
- :Rhyl
- :Rhymney River
- :Rhymney line
- :Rhys Davies (writer)
- :Rhys Gryg
- :Rhys Williams (rugby union, born 1980)
- :Rhys ab Owain
- :Rhys ap Maredudd
- :Rhys ap Tewdwr
- :Rhys ap Thomas
- :Richard Bryn Williams
- :Richard Commission
- :Richard Llewellyn
- :Richard Owens (architect)
- :Richey Edwards
- :Richie Burnett
- :Ricky Valance
- :Ring of Iron
- :Risca
- :River Aeron
- :River Afan
- :River Alyn
- :River Ceiriog
- :River Clwyd
- :River Conwy
- :River Dwyryd
- :River Dyfi
- :River Ely
- :River Loughor
- :River Monnow
- :River Rhondda
- :River Taf
- :River Tawe
- :River Ystwyth
- :Riverfront Arts Centre
- :Road signs in Wales
- :Robert Buckland
- :Robert Rees (singer)
- :Robert Tear
- :Roch Castle
- :Rocío Cifuentes
- :Rod Richards
- :Rodney Parade
- :Roger Boore
- :Roger Glover
- :Rogiet Hoard
- :Roman Catholic Archdiocese of Cardiff-Menevia
- :Ronald Waterhouse (judge)
- :Roose Hundred
- :Rosemary Butler (politician)
- :Ross and Monmouth Railway
- :Roy Noble
- :Royal Cambrian Academy of Art
- :Royal Charter Storm
- :Royal Commission on the Ancient and Historical Monuments of Wales
- :Royal Gwent Hospital
- :Royal Monmouthshire Royal Engineers
- :Royal Welsh Show
- :Ruabon–Barmouth line
- :Rumney Railway
- :Ruth Bidgood
- :Ruth Jones (politician)
- :Ruth Reed
- :S4C Chwaraeon
- :Sain (record label)
- :Sam Vokes
- :Sarn Helen
- :Saundersfoot
- :Scheduled monuments in Powys
- :Scotch Cattle
- :Scrum V
- :Sean Moore (musician)
- :Second Morgan government
- :Segontium
- :Seisyll ap Dyfnwal
- :Seisyllwg
- :Senedd and Elections (Wales) Act 2020
- :Senghenydd
- :Sennybridge Training Area
- :Sessions House, Usk
- :Severn Estuary
- :Severn Tunnel Junction railway station
- :Shadow Cabinet of Wales
- :Shani Rhys James
- :Shrewsbury and Welshpool Railway
- :Shrewsbury–Chester line
- :Shân Cothi
- :Sid Judd
- :Sir John Wynn, 1st Baronet
- :Sketty (electoral ward)
- :Sophia Bulkeley
- :Sophie Ingle
- :South Stack Lighthouse
- :South Wales Argus
- :South Wales Coal Measures Group
- :South Wales Echo
- :South Wales Evening Post
- :South Wales Fire and Rescue Service
- :South Wales Metro
- :South Wales Miners' Federation
- :South Wales Police
- :South Wales Railway
- :South Wales Transport
- :Squash Wales
- :St. Thomas (electoral ward)
- :St Aelhaiarn's Church, Guilsfield
- :St Brynach Cross
- :St Cadfan's Church, Tywyn
- :St Clears
- :St Cwyfan's Church, Llangwyfan
- :St Cybi's Church
- :St David's Hall
- :St Davids Bishops Palace
- :St Davids and the Cathedral Close
- :St Fagans Castle
- :Statue of Charles Rolls, Monmouth
- :Stella (British TV series)
- :Steve Jones (runner)
- :Steve Martin (academic)
- :Steve Robinson (boxer)
- :Steve Speirs
- :Strata Florida Abbey
- :Stuart Cable
- :Sunday Closing (Wales) Act 1881
- :Swallow Falls
- :Swansea Bay
- :Swansea Bay University Health Board
- :Swansea Blitz
- :Swansea Market
- :Swansea RFC
- :Swansea The Mount railway station
- :Swansea and Mumbles Railway
- :Sybil Thomas, Viscountess Rhondda
- :Sycharth
- :Sydney Curnow Vosper
- :T. E. Ellis
- :Taith Joint Board
- :Tal-y-coed Court
- :Talerddig
- :Talgarth
- :Talhaiarn
- :Talley Abbey
- :Tanni Grey-Thompson
- :Tarenni Colliery
- :Techniquest
- :Teddy Morgan
- :Teifi Valley Railway
- :Tenby
- :Tenby Museum and Art Gallery
- :Tenby town walls
- :Terry Parsons
- :The Dispensary, Monmouth
- :The Dragon Has Two Tongues
- :The Indian Doctor
- :The Kymin
- :The Princess and the Goblin (film)
- :The Rolls Hall, Monmouth
- :The Silent Village
- :The Vale Resort
- :The Welsh at Mametz Wood (painting)
- :The White Swan Inn, Monmouth
- :Theatre of Wales
- :Third Morgan government
- :Thomas Charles
- :Thomas Howell (bishop)
- :Thomas Penson
- :Thomas Savin
- :Thomas Williams of Llanidan
- :Tinkinswood
- :Tir na n-Og Award
- :Titles of the Welsh Court
- :Tommy Vile
- :Ton Pentre
- :Tondu
- :Tonia Antoniazzi
- :Tonypandy
- :Tonypandy riots
- :Torfaen County Borough Council
- :Tower Colliery
- :Town and country planning in Wales
- :Townhill (electoral ward)
- :Trawsfynydd nuclear power station
- :Trealaw
- :Tredegar Medical Aid Society
- :Treforest
- :Tregwynt Hoard
- :Treherbert
- :Treorchy
- :Tresilian Bay
- :Tretower Castle
- :Triple harp
- :Trostre Steelworks
- :Troy House
- :Trunk road agent
- :Tryfan
- :Tryweryn flooding
- :Tudor Owen (actor)
- :Tudors of Penmynydd
- :Twelve Knights of Glamorgan
- :Tŷ Hafan
- :Tŷ Hywel
- :Undeb Cymru Fydd
- :Underwood, Newport
- :Undy
- :Unionism in Wales
- :University Hospital Llandough
- :University of Wales Registry
- :Uplands (electoral ward)
- :Upper Boat Studios
- :Urdd Gobaith Cymru
- :Urdd National Eisteddfod
- :Urdd Peace and Goodwill Message
- :Usk
- :Usk Castle
- :Vale of Ewyas
- :Vale of Glamorgan Council
- :Vale of Glamorgan Festival
- :Vale of Neath
- :Vale of Neath Railway
- :Valerie Davies
- :Vaughan Roderick
- :Velindre Cancer Centre
- :Venta Silurum
- :Victoria Terrace, Beaumaris
- :Visit Wales
- :Vivian Hewitt
- :Vortimer
- :W. H. Davies
- :W. J. Gruffydd
- :WJEC (exam board)
- :WRU Division Three East
- :WRU Division Three West
- :WRU League 1 East
- :WRU League 2 East
- :Wales A national rugby union team
- :Wales Act 1978
- :Wales Book of the Year
- :Wales Coast Path
- :Wales Empire Pool
- :Wales Green Party
- :Wales Institute for Sustainable Education
- :Wales Open
- :Wales Route Utilisation Strategy
- :Wales and Berwick Act 1746
- :Wales and Borders
- :Wales at the 2011 Commonwealth Youth Games
- :Wales men's national squash team
- :Wales national rugby sevens team
- :Wales national under-21 football team
- :Wales women's national field hockey team
- :Wales women's national football team
- :Wales women's national rugby union team
- :Walter Coffin
- :Walter Cradock
- :Water privatisation in England and Wales
- :Waterfall Country (Wales)
- :Welsh 1000 m Peaks Race
- :Welsh Agricultural College
- :Welsh Ambulance Service
- :Welsh Americans
- :Welsh Baccalaureate
- :Welsh Bicknor
- :Welsh Braille
- :Welsh Canadians
- :Welsh Championship
- :Welsh Cup
- :Welsh Folk Dance Society
- :Welsh Football League
- :Welsh Football League Division One
- :Welsh Government traffic officer
- :Welsh Grand National
- :Welsh Historic Gardens Trust
- :Welsh Intermediate Education Act 1889
- :Welsh Language Board
- :Welsh Language Commissioner
- :Welsh Marches line
- :Welsh Mountain Zoo
- :Welsh Mountain sheep
- :Welsh National War Memorial
- :Welsh Presbyterian Chapel, Charing Cross Road
- :Welsh Rarebit (radio programme)
- :Welsh Revenue Authority
- :Welsh Sinfonia
- :Welsh Sports Hall of Fame
- :Welsh Wikipedia
- :Welsh bagpipes
- :Welsh coal strike of 1898
- :Welsh dance
- :Welsh gold
- :Welsh hat
- :Welsh history in Chicago
- :Welsh numerals
- :Welsh poetry
- :Welsh pop and rock music
- :Welsh rugby union system
- :Welsh settlement in the Americas
- :Welshpool and Llanfair Light Railway
- :Weobley Castle, Gower
- :When Was Wales?
- :Wild Wales
- :William Cope, 1st Baron Cope
- :William Haggar
- :William Henry Preece
- :William Jenkins (coal merchant)
- :William Mathias
- :William Menelaus
- :William Powell (Liberal Democrat politician)
- :William Salesbury
- :William Williams (Caledfryn)
- :William Wroth
- :Williams baronets
- :Willie Llewellyn
- :Wilmot Vaughan, 1st Earl of Lisburne
- :Workingman's Institute and Memorial Hall
- :Wrexham, Mold and Connah's Quay Railway
- :Wrexham Maelor Hospital
- :Wrexham and Ellesmere Railway
- :Wylfa nuclear power station
- :Wyn Roberts, Baron Roberts of Conwy
- :Y Byd
- :Y Cymro
- :Y Fro Gymraeg
- :Y Lle Celf
- :Ye Olde Murenger House
- :Yes for Wales
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- :.cymru
- :100 Great Welsh Women
- :102.5 Radio Pembrokeshire
- :14 Beaufort Square, Chepstow
- :1707 in Wales
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- :1709 in Wales
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- :1712 in Wales
- :1713 in Wales
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- :1715 in Wales
- :1716 in Wales
- :1723 in Wales
- :1837 Anglesey by-election
- :1857 Carmarthenshire by-election
- :1861 Pembrokeshire by-election
- :1876 Carmarthen Boroughs by-election
- :1878 Carmarthen Boroughs by-election
- :1881–82 Home Nations rugby union matches
- :1881–82 Welsh Cup
- :1884 Home Nations Championship
- :1885 Home Nations Championship
- :1886 Home Nations Championship
- :1887 Cardiff Town Council election
- :1887 Home Nations Championship
- :1888 Home Nations Championship
- :1889 Cardiff County Borough Council election
- :1889 Carmarthenshire County Council election
- :1889 Home Nations Championship
- :1890 Caernarvon Boroughs by-election
- :1890 Cardiff County Borough Council election
- :1890 Home Nations Championship
- :1891 Home Nations Championship
- :1892 Cardiff County Borough Council election
- :1892 Carmarthenshire County Council election
- :1892 Home Nations Championship
- :1894 Carmarthen Rural District Council election
- :1894 Home Nations Championship
- :1894 Ystradyfodwg Urban District Council election
- :1895 Carmarthenshire County Council election
- :1895 Home Nations Championship
- :1895–96 Welsh Cup
- :1896 Home Nations Championship
- :1896 Welsh Cup final
- :1897 Home Nations Championship
- :1898 Glamorgan County Council election
- :1898 Home Nations Championship
- :1899 Home Nations Championship
- :1901 Glamorgan County Council election
- :1901 Home Nations Championship
- :1903 Home Nations Championship
- :1904 Aberdare Urban District Council election
- :1904 Home Nations Championship
- :1906 Aberdare Urban District Council election
- :1906 Home Nations Championship
- :1907 Aberdare Urban District Council election
- :1907 Home Nations Championship
- :1907–08 Welsh Amateur Cup
- :1908 Aberdare Urban District Council election
- :1908–09 Welsh Amateur Cup
- :1909 Aberdare Urban District Council election
- :1910 Aberdare Urban District Council election
- :1910 Glamorgan County Council election
- :1910 Swansea District by-election
- :1911 South Wales anti-Jewish riots
- :1912 Carmarthen District by-election
- :1912 East Carmarthenshire by-election
- :1912–13 Newport County A.F.C. season
- :1913–14 Newport County A.F.C. season
- :1914–15 Cardiff City F.C. season
- :1914–15 Newport County A.F.C. season
- :1917 South Monmouthshire by-election
- :1919 Carmarthen Rural District Council election
- :1919 Glamorgan County Council election
- :1919 Swansea East by-election
- :1919–20 Cardiff City F.C. season
- :1919–20 Newport County A.F.C. season
- :1920 Cardiff City Council election
- :1920 Rhondda West by-election
- :1920–21 Newport County A.F.C. season
- :1921–22 Newport County A.F.C. season
- :1922 Newport by-election
- :1922–23 Newport County A.F.C. season
- :1923–24 Newport County A.F.C. season
- :1924 Carmarthen by-election
- :1924–25 Newport County A.F.C. season
- :1925 Llandeilo Rural District Council election
- :1925–26 Newport County A.F.C. season
- :1926–27 Newport County A.F.C. season
- :1927–28 Newport County A.F.C. season
- :1928 Cardiff City Council election
- :1928 Carmarthen by-election
- :1928 Welsh Cup final
- :1928–29 Newport County A.F.C. season
- :1929–30 Newport County A.F.C. season
- :1930–31 Newport County A.F.C. season
- :1931–32 Cardiff City F.C. season
- :1931–32 Newport County A.F.C. season
- :1931–32 Welsh Cup
- :1932–33 Cardiff City F.C. season
- :1932–33 Newport County A.F.C. season
- :1932–33 Welsh Cup
- :1933 Rhondda East by-election
- :1933–34 Newport County A.F.C. season
- :1933–34 Welsh Cup
- :1934 Merthyr by-election
- :1934–35 Newport County A.F.C. season
- :1934–35 Welsh Cup
- :1935–36 Cardiff City F.C. season
- :1935–36 Newport County A.F.C. season
- :1936–37 Cardiff City F.C. season
- :1936–37 Newport County A.F.C. season
- :1937 Library (Swansea University)
- :1937–38 Cardiff City F.C. season
- :1937–38 Newport County A.F.C. season
- :1938–39 Newport County A.F.C. season
- :1939 Caerphilly by-election
- :1939–40 Newport County A.F.C. season
- :1940 Swansea East by-election
- :1941 Carmarthen by-election
- :1943 University of Wales by-election
- :1945 Caernarvon Boroughs by-election
- :1945 Newport by-election
- :1945–46 Newport County A.F.C. season
- :1946–47 Cardiff City F.C. season
- :1946–47 Newport County A.F.C. season
- :1947–48 Cardiff City F.C. season
- :1948–49 Cardiff City F.C. season
- :1948–49 Newport County A.F.C. season
- :1949–50 Cardiff City F.C. season
- :1949–50 Newport County A.F.C. season
- :1950 Abertillery by-election
- :1950–51 Newport County A.F.C. season
- :1951–52 Newport County A.F.C. season
- :1952 Neath Rural District Council election
- :1952–53 Newport County A.F.C. season
- :1953–54 Newport County A.F.C. season
- :1954 Aberdare by-election
- :1954–55 Newport County A.F.C. season
- :1955 Wrexham by-election
- :1955–56 Newport County A.F.C. season
- :1956–57 Newport County A.F.C. season
- :1957 Carmarthen by-election
- :1957–58 Newport County A.F.C. season
- :1958–59 Newport County A.F.C. season
- :1959–60 Newport County A.F.C. season
- :1960–61 Newport County A.F.C. season
- :1960–61 Welsh Cup
- :1961–62 Newport County A.F.C. season
- :1962–63 Newport County A.F.C. season
- :1963 Swansea East by-election
- :1963–64 Newport County A.F.C. season
- :1964–65 Newport County A.F.C. season
- :1965–66 Newport County A.F.C. season
- :1966–67 Newport County A.F.C. season
- :1967 Glamorgan County Council election
- :1967–68 Newport County A.F.C. season
- :1968 Wales rugby union tour of Argentina
- :1968–69 Newport County A.F.C. season
- :1969–70 Newport County A.F.C. season
- :1970–71 Newport County A.F.C. season
- :1972 World Amateur Snooker Championship
- :1972–73 Newport County A.F.C. season
- :1973 South Glamorgan County Council election
- :1973–74 Newport County A.F.C. season
- :1974–75 Newport County A.F.C. season
- :1975–76 Newport County A.F.C. season
- :1976–77 Cardiff City F.C. season
- :1976–77 Newport County A.F.C. season
- :1977 South Glamorgan County Council election
- :1977–78 Newport County A.F.C. season
- :1978–79 Newport County A.F.C. season
- :1979–80 Newport County A.F.C. season
- :1979–80 Welsh Cup
- :1980–81 Newport County A.F.C. season
- :1981 South Glamorgan County Council election
- :1981–82 Newport County A.F.C. season
- :1982–83 Newport County A.F.C. season
- :1983 Carmarthen District Council election
- :1983 Preseli District Council election
- :1986–87 Newport County A.F.C. season
- :1987 Carmarthen District Council election
- :1987 Ceredigion District Council election
- :1987 Dinefwr Borough Council election
- :1987–88 Newport County A.F.C. season
- :1988 Wales rugby union tour of New Zealand
- :1988–89 Newport County A.F.C. season
- :1990 Wales rugby union tour of Namibia
- :1990–91 FA Cup
- :1991 Carmarthen District Council election
- :1991 Dinefwr Borough Council election
- :1991 Plaid Cymru presidential election
- :1991 Preseli Pembrokeshire District Council election
- :1991–92 FA Cup
- :1992–93 FA Cup
- :1992–93 League of Wales
- :1993 Dyfed County Council election
- :1993–94 FA Cup
- :1994 Pontins Professional
- :1994–95 FA Cup
- :1995 Carmarthenshire County Council election
- :1995 Powys County Council election
- :1995 Wales rugby union tour of South Africa
- :1995–96 FA Cup
- :1996 South Africa rugby union tour of Argentina and Europe
- :1996 Wales rugby union tour of Australia
- :1996–97 FA Cup
- :1997 United States rugby union tour of Wales
- :1997 Wales rugby union tour of North America
- :1997–98 FA Cup
- :1998 Pontins Professional
- :1998 Welsh Conservatives leadership election
- :1998 Welsh Labour leadership election
- :1998–99 FA Cup
- :1999 Carmarthenshire County Council election
- :1999 Neath Port Talbot County Borough Council election
- :1999 Pontins Professional
- :1999 Powys County Council election
- :1999 World Professional Pool Championship
- :1999–2000 FA Cup
- :1–6 Priory Street, Monmouth
- :2000 Pontins Professional
- :2000–01 FA Cup
- :2001 Cardiff Sevens
- :2001 Swansea East by-election
- :2001 United Kingdom general election in Wales
- :2001–02 Celtic League
- :2001–02 FA Cup
- :2002 Ogmore by-election
- :2002 Wales rugby union tour of South Africa
- :2002–03 Celtic League
- :2002–03 FA Cup
- :2003–04 Celtic League
- :2003–04 FA Cup
- :2003–04 Llanelli Scarlets season
- :2003–04 in Welsh football
- :2004 Bridgend County Borough Council election
- :2004 Cardiff Council election
- :2004 Carmarthenshire County Council election
- :2004 City and County of Swansea Council election
- :2004 Neath Port Talbot County Borough Council election
- :2004 Newport City Council election
- :2004 Powys County Council election
- :2004 Vale of Glamorgan Council election
- :2004 Wales Rally GB
- :2004 Wales rugby union tour of Argentina and South Africa
- :2004–05 Celtic League
- :2004–05 FA Cup
- :2004–05 Llanelli Scarlets season
- :2005–06 Celtic League
- :2005–06 FA Cup
- :2005–06 Llanelli Scarlets season
- :2006–07 FA Cup
- :2006–07 Llanelli Scarlets season
- :2006–07 Welsh League Cup
- :2006–07 in Welsh rugby union
- :2007 FAW Premier Cup final
- :2007–08 FAW Premier Cup
- :2007–08 FA Cup
- :2007–08 Welsh Cup
- :2007–08 Welsh Premier League
- :2008 Carmarthenshire County Council election
- :2008 City and County of Swansea Council election
- :2008 Conwy County Borough Council election
- :2008 FAW Premier Cup final
- :2008 Neath Port Talbot County Borough Council election
- :2008 Newport City Council election
- :2008 Powys County Council election
- :2008 Vale of Glamorgan Council election
- :2008 Wales rugby union tour of South Africa
- :2008 Welsh local elections
- :2008–09 FA Cup
- :2008–09 Principality Premiership
- :2008–09 Welsh Premier League
- :2009 Welsh Labour leadership election
- :2009 Welsh Open (snooker)
- :2009–10 British and Irish Cup
- :2009–10 FA Cup
- :2009–10 Principality Premiership
- :2009–10 Welsh League Cup group stage
- :2009–10 Welsh Premier League
- :2009–10 Welsh Premier Women's League
- :2010 Celtic League Grand Final
- :2010 Welsh Cup final
- :2010–11 British and Irish Cup
- :2010–11 FA Cup
- :2010–11 Principality Premiership
- :2010–11 Welsh Alliance League
- :2010–11 Welsh Cup
- :2010–11 Welsh Football League Division One
- :2010–11 Welsh Premier League
- :2011 Celtic League Grand Final
- :2011 Wales Rally GB
- :2011 Welsh devolution referendum
- :2011–12 British and Irish Cup
- :2011–12 FA Cup
- :2011–12 Pro12
- :2011–12 Welsh Cup
- :2011–12 Welsh Premier League
- :2012 Carmarthenshire County Council election
- :2012 Ceredigion County Council election
- :2012 City and County of Swansea Council election
- :2012 International Rugby Series
- :2012 Newport City Council election
- :2012 North Wales Crusaders season
- :2012 Powys County Council election
- :2012 Welsh local elections
- :2012–13 British and Irish Cup
- :2012–13 FA Cup
- :2012–13 LV Cup
- :2012–13 Pro12
- :2012–13 Welsh Premier League
- :2013 Football League Cup final
- :2013 Great Britain and Ireland heatwave
- :2013 North Wales Crusaders season
- :2013 Wales rugby union tour of Japan
- :2013–14 British and Irish Cup
- :2013–14 FA Cup
- :2013–14 LV Cup
- :2013–14 Premier League
- :2013–14 Pro12
- :2013–14 Scarlets season
- :2013–14 Swansea City A.F.C. season
- :2013–14 Welsh Premier League
- :2013–14 Welsh Premier Women's League
- :2013–14 Welsh Women's Cup
- :2013–2014 Atlantic winter storms in Europe
- :2014 IPC Athletics European Championships
- :2014 Premiership Rugby Sevens Series
- :2014 Tour of Britain
- :2014 Wales rugby union tour of South Africa
- :2014–15 British and Irish Cup
- :2014–15 Cymru Alliance
- :2014–15 FA Cup
- :2014–15 FA Cup qualifying rounds
- :2014–15 LV Cup
- :2014–15 Pro12
- :2014–15 Welsh Premier Women's League
- :2015 Championship 1
- :2015 Minor Counties Championship
- :2015 Premiership Rugby Sevens Series
- :2015 Tour of Britain
- :2015 United Kingdom general election in Wales
- :2015 World Grand Prix
- :2015–16 British and Irish Cup
- :2015–16 FA Cup
- :2015–16 Pro12
- :2015–16 WRU Challenge Cup
- :2015–16 Welsh League Cup
- :2015–16 Welsh Premier League
- :2015–16 Welsh Premier Women's League
- :2016 Minor Counties Championship
- :2016 National Assembly for Wales election
- :2016 Tour of Britain
- :2016 Wales rugby union tour of New Zealand
- :2016 World Grand Prix
- :2016–17 Anglo-Welsh Cup
- :2016–17 British and Irish Cup
- :2016–17 EFL Cup
- :2016–17 FA Cup
- :2016–17 Principality Premiership
- :2016–17 Pro12
- :2016–17 WRU Championship
- :2016–17 Welsh League Cup
- :2016–17 Welsh Premier League
- :2017 Bridgend County Borough Council election
- :2017 Denbighshire County Council election
- :2017 Extreme Sailing Series
- :2017 Isle of Anglesey County Council election
- :2017 Minor Counties Championship
- :2017 Newport City Council election
- :2017 Players Championship (snooker)
- :2017 Tour of Britain
- :2017 Wales Rally GB
- :2017 Wales rugby union tour of Tonga and Samoa
- :2017 Welsh Open (snooker)
- :2017 Wrexham County Borough Council election
- :2017–18 Anglo-Welsh Cup
- :2017–18 British and Irish Cup
- :2017–18 Cardiff City F.C. season
- :2017–18 EFL Cup
- :2017–18 English Football League
- :2017–18 FAW Women's Cup
- :2017–18 FA Cup
- :2017–18 Principality Premiership
- :2017–18 Pro14
- :2017–18 Scarlets season
- :2017–18 WRU Championship
- :2017–18 Welsh Premier League
- :2018 Alyn and Deeside by-election
- :2018 Green Party of England and Wales leadership election
- :2018 Minor Counties Championship
- :2018 Plaid Cymru leadership election
- :2018 Players Championship (snooker)
- :2018 Tour of Britain
- :2018–19 EFL Cup
- :2018–19 English Football League
- :2018–19 FAW Women's Cup
- :2018–19 FA Cup
- :2018–19 Principality Premiership
- :2018–19 WRU Championship
- :2018–19 Welsh League Cup
- :2018–19 Welsh Premier League
- :2019 Inter Games Football Tournament
- :2019 Minor Counties Championship
- :2019 South Wales paternal sex abuse case
- :2019–20 Cymru North
- :2019–20 Cymru Premier
- :2019–20 EFL Cup
- :2019–20 English Football League
- :2019–20 FA Cup
- :2019–20 Indigo Group Premiership
- :2019–20 WRU Championship
- :2019–20 Welsh League Cup
- :2020 Wales Rally GB
- :2020–21 Cymru North
- :2020–21 Cymru Premier
- :2020–21 English Football League
- :2020–21 FA Cup
- :2020–21 National League
- :2020–21 Welsh League Cup
- :2021 Curtis Cup
- :2021 English Football League play-offs
- :2021 National Counties Championship
- :2021–22 Cymru North
- :2021–22 English Football League
- :2021–22 FA Cup
- :2021–22 Scarlets season
- :2021–22 United Rugby Championship
- :2021–22 Wrexham A.F.C. season
- :2022 European Ladies' Team Championship
- :2022 National Counties Championship
- :2022 Newport City Council election
- :2022 Rhondda Cynon Taf County Borough Council election
- :2022 Welsh local elections
- :2022 in Wales
- :2022–23 Ardal NE
- :2022–23 Ardal NW
- :2022–23 Ardal SE
- :2022–23 Ardal SW
- :2022–23 Cymru Premier
- :2022–23 FA Cup
- :2022–23 FA Vase
- :2022–23 Indigo Group Premiership
- :2022–23 Scarlets season
- :2022–23 WRU Championship
- :2022–23 in Welsh football
- :2023 Cardiff Cross Challenge
- :2023 Cardiff riot
- :2023 Six Nations Championship
- :2023 in Wales
- :2023–24 Ardal NW
- :2023–24 Ardal SE
- :2023–24 Ardal SW
- :2023–24 FA Cup
- :2023–24 Premier League Cup
- :2023–24 Scarlets season
- :2023–24 in Welsh football
- :2024 United Kingdom general election in Wales
- :2024 Welsh government crisis
- :2024–25 Welsh Cup
- :203 (Welsh) Multi-Role Medical Regiment
- :2353 (Ystrad Mynach) Squadron ATC
- :27 Old Market Street, Usk
- :2CV 24 Hour Race
- :2 & 2A Well Street, Ruthin
- :2 Grosvenor Road, Wrexham
- :30 Bridge Street, Usk
- :33 Whitecross Street, Monmouth
- :9 Agincourt Street, Monmouth
- :A.F.C. Porth
- :A. H. Dodd
- :A4042 road
- :A4059 road
- :A4069 road
- :A4107 road
- :A4119 road
- :A4138 road
- :A4160 road
- :A4161 road
- :A4214 road
- :A4216 road
- :A4221 road
- :A4226 road
- :A4230 road
- :A4240 road
- :A4241 road
- :A465 road
- :A473 road
- :A474 road
- :A475 road
- :A477 road
- :A479 road
- :A481 road
- :A482 road
- :A483 road
- :A485 road
- :A493 road
- :A496 road
- :A5025 road
- :A Child's Christmas in Wales
- :Aaron Lewis (footballer)
- :Aaron Morris (footballer)
- :Abbey Cwmhir Hall
- :Abbey Hotel, Llanthony Priory
- :Abbey of St Mary, St Dogmaels
- :Abbie Trayler-Smith
- :Abdulrahim Abby Farah
- :Abenbury
- :Aber Afon Seiont
- :Aber Falls
- :Aber Taf
- :Aber railway station
- :Aber railway station (Gwynedd)
- :Aberaman Hall and Institute
- :Aberaman North
- :Aberangell railway station
- :Aberavon (electoral ward)
- :Aberavon Beach
- :Aberbargoed Grasslands
- :Aberbechan Hall
- :Aberbeeg
- :Abercamlais
- :Abercanaid
- :Abercarn
- :Abercarn railway station
- :Abercastle
- :Aberconwy Abbey
- :Aberconwy House
- :Abercorris quarry
- :Abercraf
- :Abercraf transmitting station
- :Abercregan
- :Abercwmboi
- :Abercwmeiddaw quarry
- :Abercych
- :Abercynllaith
- :Abercynon
- :Abercynon Colliery
- :Aberdare, Merthyr and Dowlais Miners' Association
- :Aberdare (UK Parliament constituency)
- :Aberdare Athletic F.C.
- :Aberdare East
- :Aberdare General Hospital
- :Aberdare Girls' School
- :Aberdare Hall
- :Aberdare Local Board of Health
- :Aberdare RFC
- :Aberdare RLFC
- :Aberdare School Board
- :Aberdare Town (electoral ward)
- :Aberdare West
- :Aberdare railway station
- :Aberdovey Lifeboat Station
- :Aberdovey railway station
- :Aberdulais
- :Aberdulais Falls
- :Aberedw Castle
- :Abereiddy
- :Abererch railway station
- :Aberfan Cemetery
- :Abergavenny Brecon Road railway station
- :Abergavenny Food Festival
- :Abergavenny Hundred
- :Abergavenny Junction railway station
- :Abergavenny Priory Deer Park
- :Abergavenny RFC
- :Abergavenny Thursdays F.C.
- :Abergavenny Town Hall
- :Abergavenny railway station
- :Abergavenny town walls
- :Abergavenny transmitting station
- :Abergele
- :Abergele & Pensarn railway station
- :Abergele Golf Club
- :Abergele Hospital
- :Aberglaslyn Hall
- :Aberglasney
- :Abergwili
- :Abergwili Junction railway station
- :Abergwyngregyn
- :Abergynolwyn
- :Aberkenfig
- :Aberllefenni
- :Aberllefenni quarries
- :Abermawr
- :Abermorddu
- :Abermule railway station
- :Abernant, Rhondda Cynon Taf
- :Aberpergwm House
- :Aberporth
- :Abersoch
- :Abersychan
- :Abersychan and Talywain railway station
- :Aberthaw
- :Aberthaw Cement Works
- :Aberthaw power stations
- :Aberthin
- :Abertillery (UK Parliament constituency)
- :Abertillery RFC
- :Abertillery railway station
- :Abertoir
- :Abertysswg
- :Aberysgir Castle
- :Aberystruth
- :Aberystwyth Arts Centre
- :Aberystwyth Cliff Railway
- :Aberystwyth Lifeboat Station
- :Aberystwyth Sea2shore Food Festival
- :Aberystwyth Town Hall
- :Aberystwyth Town Ladies F.C.
- :Aberystwyth and Tregaron Bank
- :Abraham Matthews
- :Abraham Rees
- :Academic dress of the University of Wales
- :Academy of Medical Educators, United Kingdom
- :Acton, Wrexham
- :Adam Alexander (horticulturalist)
- :Adam Birchall
- :Adam Davies (footballer, born 1992)
- :Adam Harrison
- :Adam Matthews
- :Adar Rhiannon
- :Adequate Seven
- :Aderyn y Corff
- :Adi Taviner
- :Admiralty Arch, Holyhead
- :Adran Premier
- :Adre (TV series)
- :Adrian Dingle (artist)
- :Adrian Lewis Morgan
- :Adult Learning Wales
- :Adventure Parc Snowdonia
- :Adwaith
- :Aerdeyrn
- :Aeron (kingdom)
- :Aeron Express
- :Aethwy (electoral ward)
- :Afan Lido F.C.
- :Afon Braint
- :Afon Cennen
- :Afon Clarach
- :Afon Clywedog
- :Afon Col-huw
- :Afon Crafnant
- :Afon Cych
- :Afon Dulas, Llanidloes
- :Afon Dwyfor
- :Afon Fathew
- :Afon Gyffin
- :Afon Hepste
- :Afon Irfon
- :Afon Llyfnant
- :Afon Marlais, Pembrokeshire
- :Afon Sychryd
- :Afon Twrch
- :Afon Wen
- :Afon Wen railway station
- :Age of the Saints
- :Agincourt House, Monmouth
- :Agnes Twiston Hughes
- :Air Wales
- :Air Wales (1977)
- :Airbus UK Broughton F.C.
- :Airways International Cymru
- :Alan David (actor)
- :Alan Fine (writer)
- :Alan Holmes
- :Alan Morgan (footballer, born 1973)
- :Alan P. F. Sell
- :Alan Petherbridge
- :Albert Gubay
- :Albert L. Harris
- :Albert Owen
- :Albert Powell (footballer)
- :Albion
- :Albion Ale House
- :Albion Colliery
- :Albion Glacigenic Group
- :Albro Castle
- :Alec Jones
- :Alec Templeton
- :Aled Brew
- :Aled Davies (field athlete)
- :Aled Haydn Jones
- :Aled Jones
- :Aled Roberts
- :Aled Rural District
- :Aleighcia Scott
- :Alex Bray
- :Alex Callender
- :Alex Davies-Jones
- :Alex Gerrard (rugby league)
- :Alex Griffiths (cricketer)
- :Alex Horton
- :Alex Munro (comedian)
- :Alex Penny
- :Alexa Davies
- :Alexander Jones (footballer)
- :Alexander Vlahos
- :Alexandra (Penarth electoral ward)
- :Alexandra Boyd
- :Alf Higgs
- :Alf Morgans
- :Alffa
- :Alfred Brice
- :Alfred Cattell
- :Alfred Davies (footballer)
- :Alfred Mathews
- :Alfred Neobard Palmer
- :Alfred Ollivant (bishop)
- :Alfred Onions
- :Algernon Islay de Courcy Lyons
- :Alia Syed
- :Alice Gray Jones
- :Alice Griffiths
- :Alice Thomas Ellis
- :Alice Williams (welfare worker)
- :Alison Statton
- :All Saints' Church, Oystermouth
- :All Saints Church, Ammanford
- :All Saints Church, Buttington
- :All Saints Church, Deganwy
- :All Saints Church, Higher Kinnerton
- :All Saints Church, Porthcawl
- :All Saints Primary School, Gresford
- :All Souls Chapel (Cardiff)
- :Allan Jones (footballer, born 1940)
- :Allan Rogers
- :Allan Watson (American football)
- :Allan Yn Y Fan
- :Allen Forward
- :Allen Raine
- :Allt-y-Bela
- :Allt y Gaer
- :Allt y wern
- :Allt yr Esgair
- :Alltami
- :Alltwalis
- :Alltwen
- :Alltwen television relay station
- :Altaf Hussain (Welsh politician)
- :Alun Cairns
- :Alun Evans (FAW)
- :Alun Ffred Jones
- :Alun Gwynne Jones, Baron Chalfont
- :Alun Hoddinott
- :Alun Huw Davies
- :Alun Richards
- :Alun School
- :Alwen Reservoir
- :Alwyn Jones (biophysicist)
- :Alwyn Sheppard Fidler
- :Alwyn Williams (geologist)
- :Alyn and Deeside (UK Parliament constituency)
- :Alys ferch Owain Glyndŵr
- :Amaethon
- :Amanda Bennett (rugby union)
- :Amanda Sater, Baroness Sater
- :Ambleston
- :Ambrose Bebb
- :Amelia Womack
- :Amlwch
- :Amlwch Lighthouse
- :Amlwch Town F.C.
- :Amman Valley Hospital
- :Ammanford Urban District Council
- :Ammanford railway station
- :Amroth
- :Amroth Castle
- :Amy Boulden
- :Amy Evans (rugby union)
- :Amy King (cyclist)
- :Amy Parry-Williams
- :Amy Roberts
- :Anarawd ap Gruffydd
- :Ancient Monuments Society
- :Andrea Byrne
- :Andrea Worrall
- :Andrew Davies (darts player)
- :Andrew Dawes (brigadier)
- :Andrew Jones (filmmaker)
- :Andrew Lamerton
- :Andrew Pettigrew (landscape gardener)
- :Andrew Phillip Smith
- :Andrew RT Davies
- :Andrew Ranger (politician)
- :Andrew Selby
- :Andrews Windsor
- :Andy Dibble
- :Andy Dunbobbin
- :Andy John
- :Andy Marriott
- :Andy Newman
- :Andy Pollitt
- :Andy Scott-Lee
- :Andy Vores
- :Andy Whitfield
- :Aneirin
- :Aneurin Barnard
- :Aneurin Rees
- :Angela Kwok
- :Angela V. John
- :Angharad
- :Angharad Davies
- :Angharad James (poet)
- :Angharad Llwyd
- :Angharad Mason
- :Angharad Rees
- :Angharad ferch Owain
- :Angle, Pembrokeshire
- :Angle Lifeboat Station
- :Anglesey Airport
- :Anglesey Aluminium
- :Anglesey Circuit
- :Anglesey Constabulary
- :Anglesey Oyster & Welsh Produce Festival
- :Anglesey Sea Zoo
- :Anglo-Welsh Cup
- :Anian (bishop of Bangor)
- :Animal Wall
- :Anita Thapar
- :Anka Bergman
- :Ann Maddocks
- :Ann Moray
- :Anna Filbey
- :Anna Fison
- :Anna Harris
- :Anna Kashfi
- :Anna Laetitia Waring
- :Anna Maria Bennett
- :Annales Cambriae
- :Anne Borsay
- :Anne Ceridwen Rees
- :Anne Denholm
- :Anne King, Baroness King
- :Annette Bryn Parri
- :Annie Lloyd Evans
- :Annwn
- :Anthony Bushby Bacon
- :Anthony Crockett
- :Anthony Ellys
- :Anthony Kitchin
- :Anthony Malarczyk
- :Anthony Morgan of Kilfigin
- :Anthony Reynolds
- :Anthony Rudd
- :Antoinette Sandbach
- :April McMahon
- :Ar Log
- :Arawn
- :Archaeology of Wales
- :Archdeacon of Bangor
- :Archibald Hood
- :Arddleen railway station
- :Ardudwy
- :Arenig Fach
- :Arfon Griffiths
- :Arfon Group
- :Argoed High School
- :Arianrhod
- :Arllechwedd
- :Armes Prydein
- :Armorial of schools in the United Kingdom
- :Arnold le Boteler
- :Arnulf de Montgomery
- :Arriva Buses Wales
- :Art School Girlfriend
- :Art in Cardiff
- :Artes Mundi
- :Arthfael ap Rhys
- :Arthur Banks
- :Arthur Cheetham
- :Arthur Evans (politician)
- :Arthur Griffith-Boscawen
- :Arthur Harding
- :Arthur John Williams
- :Arthur Lea (footballer)
- :Arthur Rees
- :Arthur Symons
- :Arthur Wade-Evans
- :Arthur Whitford
- :Arthur ap Gwynn
- :Artificial Limb & Appliance Service
- :Arwyn Davies, Baron Arwyn
- :Arwystli
- :Ash Taylor
- :Ashley Bendle
- :Assembly Rooms, Presteigne
- :Atlantic College Lifeboat Station
- :Atlantic Trading Estate
- :Atrium, Cardiff
- :Attack! Attack! (Welsh band)
- :Aubrey Richards
- :Audlem railway station
- :Audrey Briggs
- :Augusta Mostyn
- :Augustus Anson
- :Austin Matthews
- :Azariah Shadrach
- :B. R. Rees
- :B4265 road
- :B4574 road
- :BP&GV 4 Kidwelly and 5 Cwm Mawr
- :BP Oil Refinery Ltd Ground
- :BRfm
- :BUCS Super Rugby
- :Bachawy
- :Bacheldre
- :Back Lane drill hall, Newtown
- :Bad Wolf (production company)
- :Baderon of Monmouth
- :Badminton, Blaenau Gwent
- :Bagillt
- :Baglan (electoral ward)
- :Baglan Bay
- :Baglan railway station
- :Bailey Davies
- :Bailey Park, Abergavenny
- :Baker Boys (2011 TV series)
- :Bakestone
- :Bala (New) railway station
- :Bala Junction railway station
- :Bala Lake Railway
- :Bala Town Hall
- :Ballet Cymru
- :Ballet Nimba
- :Balwen Welsh Mountain sheep
- :Banc Cambria
- :Banc Du
- :Banc y Betws
- :Bang (TV series)
- :Bangor-on-Dee
- :Bangor-on-Dee racecourse
- :Bangor Bridge
- :Bangor City Council
- :Bangor Mountain
- :Bangor Normal College
- :Bangor Town Hall
- :Bangor University Boat Club
- :Bank y Llong
- :Banking and finance in Wales
- :Banknotes of the Black Sheep Company of Wales Limited
- :Banwen
- :Banwy
- :Barafundle Bay
- :Barbara Adam
- :Barbara M. Middlehurst
- :Barclodiad y Gawres
- :Barddas
- :Bardic Grammar
- :Bardsey Lighthouse
- :Bargoed
- :Bargoed Interchange
- :Bari Morgan
- :Barland Castle
- :Barmouth Ferry
- :Barmouth Junction and Arthog Tramway
- :Barmouth Lifeboat Station
- :Barmouth railway station
- :Barn, Stable and Cider House, Great Tre-Rhew Farm, Llantilio Crossenny
- :Baron Grey of Ruthin
- :Baron Hill, Anglesey
- :Baron Mansel
- :Baron Milford
- :Baron Trefgarne
- :Baron of Hendwr
- :Barrie Vassallo
- :Barristers' chambers
- :Barry Council Office and Library
- :Barry Davies (rugby union, born 1875)
- :Barry Dock Lifeboat Station
- :Barry Dock Offices
- :Barry Docks railway station
- :Barry Flanagan
- :Barry Jones (boxer)
- :Barry Lloyd (cricketer)
- :Barry Power Station
- :Barry RLFC
- :Barry Railway Class J
- :Barry Town Council
- :Barry Welsh Is Coming
- :Basingwerk Abbey
- :Basketball Wales National League
- :Bassaleg Junction railway station
- :Basset Jhones
- :Battle of Chester
- :Battle of Hatfield Chase
- :Battle of Llwchwr
- :Battle of Stalling Down
- :Bay Pointe
- :Bay of Colwyn Town Council
- :Bayvil
- :Beacon Bog
- :Beacon Hill, Monmouthshire
- :Beacons Reservoir
- :Beacons Way
- :Beal railway station
- :Bear Hotel, Crickhowell
- :Bear Inn, Cowbridge
- :Beaufort, Blaenau Gwent
- :Beaufort Arms Hotel, Monmouth
- :Beaufort railway station (Wales)
- :Beaumaris Food Festival
- :Beaumaris Gaol
- :Beaumaris Town Hall
- :Beca (artist group)
- :Beca Lyne-Pirkis
- :Becky Brewerton
- :Beddgelert railway station
- :Beddmanarch–Cymyran
- :Bedwas
- :Bedwas, Trethomas and Machen
- :Bedwas High School
- :Bedwas Navigation Colliery
- :Bedwas RFC
- :Bedwellty House
- :Bedwellty Pits Halt railway station
- :Beer in Wales
- :Begelly
- :Beli ap Rhun
- :Belle Vue Park
- :Bellevue Park, Wrexham
- :Bellwin scheme
- :Ben Bowen Thomas
- :Ben Davies (footballer, born 1993)
- :Ben Davies (tenor)
- :Ben Jones (Welsh solicitor)
- :Ben Llewellin
- :Ben Swallow
- :Ben Thompson (footballer, born 2002)
- :Ben Watts-Jones
- :Ben Williams (rugby union, born 2002)
- :Benedict Nichols
- :Benjamin Bathurst (MP for Gloucester)
- :Benjamin Gummow
- :Benjamin Hoadly
- :Benjamin Price (bishop)
- :Benllech
- :Bentlass
- :Benton Castle
- :Berllan-deg, Llanhennock
- :Bernard (Bishop of St Davids)
- :Bernard Lloyd
- :Berriew
- :Bersham
- :Bersham Ironworks
- :Bert Dauncey
- :Bert Winfield
- :Berthin Brook
- :Bertholey House
- :Berwyn Price
- :Berwyn Rowlands
- :Berwyn range
- :Beth Morris
- :Beth Reekles
- :Bethan Dainton
- :Bethan Dyke
- :Bethan Gammon
- :Bethania Chapel, Abercynon
- :Bethania Chapel, Cwmbach
- :Bethania Chapel, Dowlais
- :Bethania Chapel, Mountain Ash
- :Bethany Chapel, Ammanford
- :Bethel, Anglesey
- :Bethel, Gwynedd
- :Bethel Baptist Chapel, Llanelli
- :Bethel Chapel, Abernant
- :Bethel Chapel, Gadlys
- :Bethel Chapel, Miskin
- :Bethel Chapel, Ynysybwl
- :Bethesda, Pembrokeshire
- :Bethesda Athletic F.C.
- :Bethesda Chapel, Abercwmboi
- :Bethesda Chapel, Merthyr Tydfil
- :Bethlehem Chapel, Mountain Ash
- :Beti George
- :Betsan Moses
- :Bettisfield railway station
- :Bettws, Bridgend
- :Bettws, Newport
- :Bettws Newydd
- :Betws, Carmarthenshire
- :Betws-y-Coed
- :Betws-y-Coed railway station
- :Betws Bach
- :Betws Bledrws Church
- :Beulah Calvinistic Methodist Chapel
- :Beulah Speckled Face
- :Beuno
- :Beverley Jones
- :Beyond the Border Storytelling Festival
- :Bible College of Wales, Sketty
- :Biblins Bridge
- :Big Leaves
- :Bigsweir Bridge
- :Bill Beynon
- :Bill Davies (cricketer, born 1901)
- :Bill Morris (rugby union, born 1869)
- :Bill Morris (rugby union, born 1941)
- :Bill Roberts (footballer, born 1859)
- :Bill Tamplin
- :Bill Webber (trade unionist)
- :Billy Bancroft
- :Billy Davies (cricketer, born 1936)
- :Billy Hullin
- :Billy Jenkins (rugby union)
- :Billy McBryde
- :Billy Rogers (footballer)
- :Billy Slade
- :Binding over
- :Birchgrove, Swansea
- :Birchgrove railway station
- :Birdshill Quarry
- :Bishop's Palace, Llandaff
- :Bishop Gore School
- :Bishop of Wrexham
- :Bishops Pond
- :Bishops and Clerks
- :Bishopston, Swansea
- :Bishopston Comprehensive School
- :Bishton
- :Bitter Harvest (1963 film)
- :Black Book of Chirk
- :Black Boy Inn
- :Black Mountain (hill)
- :Black Welsh Mountain sheep
- :Black and Tan Terrier
- :Blackmill Woodlands
- :Blackpill
- :Blackpool Mill
- :Blackwood RFC
- :Blackwood railway station (Wales)
- :Blaenau Ffestiniog (Pantyrafon) railway station
- :Blaenau Gwent County Borough Council
- :Blaenau Gwent People's Voice
- :Blaenavon High Level railway station
- :Blaenavon Hospital
- :Blaenavon Railroad
- :Blaencwm
- :Blaengarw
- :Blaengavenny Farmhouse, Llanvihangel Crucorney
- :Blaengwrach
- :Blaengwynfi railway station
- :Blaenllynfi Castle
- :Blaenplwyf Halt railway station
- :Blaenplwyf transmitting station
- :Blaenrhondda
- :Blaenwaun
- :Blaina railway station
- :Blanche Duncan
- :Bleddfa Castle
- :Bledri ap Cydifor
- :Bleiddud
- :Blestium
- :Bletherston
- :Blondin (quarry equipment)
- :Blood Bikes Wales
- :Blue Lagoon Water Park, Pembrokeshire
- :Bluestone, Pembrokeshire
- :Board of Control for Lunacy and Mental Deficiency
- :Bob John
- :Bob Morgan (diver)
- :Bob Roberts (footballer, born 1863)
- :Bobbie Cheema-Grubb
- :Bodedern
- :Bodedern Athletic F.C.
- :Bodorgan
- :Bodorgan Hall
- :Bodorgan railway station
- :Bodowyr
- :Bodrhyddan Hall
- :Bon-y-maen (electoral ward)
- :Boncath
- :Bonedd Gwŷr y Gogledd
- :Bontnewydd Palaeolithic site
- :Bonvilston
- :Book of Llandaff
- :Book of the Anchorite of Llanddewibrefi
- :Border Breweries (Wrexham)
- :Borderlands line
- :Borras
- :Borth
- :Borth Animalarium
- :Borth Lifeboat Station
- :Bosherston
- :Boston Lodge
- :Boston Lodge Halt railway station
- :Boulston
- :Bournville (Mon) Halt railway station
- :Boverton
- :Bow Street, Ceredigion
- :Boxing in Wales
- :Boy Azooga
- :Boys Village
- :Brace's Bakery
- :Bradley, Wrexham
- :Bragdy Nant
- :Braich-y-Dinas
- :Braichgoch slate mine
- :Brangwyn Hall
- :Branwen ferch Llŷr
- :Brawdy
- :Brayden Clarke
- :Brayley Reynolds
- :Breanne Loucks
- :Brechfa
- :Brechfa Forest
- :Brechfa transmitting station
- :Brecknock Wildlife Trust
- :Brecon Beacons Mountain Centre
- :Brecon Congregational Memorial College
- :Brecon East
- :Brecon Forest Tramroad
- :Brecon Free Street railway station
- :Brecon Guildhall
- :Brecon Old Bank
- :Brecon VHF-FM transmitting station
- :Brecon War Memorial Hospital
- :Brecon transmitting station
- :Breidden Hill
- :Bremia (fort)
- :Brenhinoedd y Saeson
- :Brenin Llwyd
- :Brett Johns
- :Bretton, Flintshire
- :Brewery Field
- :Brian Curvis
- :Brian Gibbons (politician)
- :Brian Godfrey
- :Brian Hibbard
- :Brian Jenkins (politician)
- :Brian John
- :Brian Law
- :Brian Masters
- :Brian Thomas (rugby union)
- :Brian Walsh (English footballer)
- :Bridell
- :Bridge Meadow Stadium
- :Bridgend & District League
- :Bridgend (UK Parliament constituency)
- :Bridgend Blue Bulls
- :Bridgend Deanery
- :Bridgend railway station
- :Bridget Bevan
- :Brimmon Oak
- :Bringing Back the Bluestones
- :Brinley Richards
- :Britain's Best Drives
- :Britannia Catchments Group
- :Brithdir Mawr
- :British Airways Engineering
- :British Hard Court Championships
- :British Rail Class 398
- :British and Irish Cup
- :Briton Ferry
- :Briton Ferry East
- :Briton Ferry Llansawel A.F.C. Ladies
- :Briton Ferry railway station
- :Briton Ferry television relay station
- :Bro Ardudwy
- :Bro Ddyfi Community Hospital
- :Bro Machno
- :Bro Morgannwg NHS Trust
- :Bro Rhosyr
- :Broad Haven
- :Broad Haven South
- :Broad Vein Mudstone Formation
- :Brofiscin Quarry
- :Broneirion
- :Bronllys
- :Bronllys Castle
- :Bronwydd
- :Bronwydd Arms railway station
- :Bronwydd Arms transmitting station
- :Bronwydd Castle
- :Brook Street drill hall, Welshpool
- :Broughton, Flintshire
- :Broughton, Wrexham
- :Broughton Bay
- :Broughton United F.C.
- :Broughton railway station (Wales)
- :Brown's Hotel, Laugharne
- :Bruce Tasker
- :Brut y Tywysogion
- :Brycheiniog (journal)
- :Brymbo Fossil Forest
- :Brymbo Institute Cricket and Football Club
- :Brymbo Victoria F.C.
- :Bryn, Neath Port Talbot
- :Bryn Allen
- :Bryn Arw
- :Bryn Beryl Hospital
- :Bryn Fôn
- :Bryn Griffiths
- :Bryn Gwyn stones
- :Bryn Jones (footballer, born 1912)
- :Bryn Law
- :Bryn Merrick
- :Bryn Oer Tramway
- :Bryn Powell
- :Bryn Pydew
- :Bryn Seion Chapel
- :Bryn Williams
- :Bryn y Neuadd Hospital
- :Brynach
- :Brynamman
- :Brynbella
- :Brynberian
- :Bryncelyn Brewery
- :Bryncethin RFC
- :Bryncoch RFC
- :Brynderi House, Llantilio Crossenny
- :Bryndraenog
- :Bryngwran
- :Bryngwyn railway station
- :Brynhenllan
- :Brynithel
- :Brynmawr
- :Brynmawr Experiment
- :Brynmawr Furniture
- :Brynmawr RFC
- :Brynmawr railway station
- :Brynmenyn
- :Brynmill
- :Brynmor John
- :Brynmor Williams
- :Brynna
- :Brynrefail
- :Brynrefail, Gwynedd
- :Bryntirion Athletic F.C.
- :Bryntysilio Hall
- :Buan, Gwynedd
- :Buarth-y-Gaer
- :Buchedd Garmon
- :Buckholt, Monmouthshire
- :Buckland Hill
- :Buckley Victoria F.C.
- :Buckley baronets
- :Buckley railway station
- :Buddhism in Wales
- :Buddig Anwylini Pughe
- :Buddug Verona James
- :Buddugre Castle
- :Buellt
- :Bugeilio'r Gwenith Gwyn
- :Building stones of Wales
- :Builth Castle
- :Builth Road railway station
- :Builth Wells
- :Builth Wells Hospital
- :Builth Wells transmitting station
- :Bulkeley Hotel
- :Burfa Castle
- :Burgess Gate
- :Burgred of Mercia
- :Burke Shelley
- :Burry Port Harbour
- :Burry Port Lifeboat Station
- :Burry Port Urban District
- :Burton, Pembrokeshire
- :Burton Mere Wetlands
- :Business rates in Wales
- :Bussy Mansel, 4th Baron Mansel
- :Bussy Mansell (1623–1699)
- :Butlin's Barry Island
- :Butlin's Pwllheli
- :Buttington Oak
- :Buttrills
- :Buwch Frech
- :Bwlch
- :Bwlch-y-Ddeufaen
- :Bwlch y Groes
- :Bwlch y Slaters quarry
- :Bwlchgwyn
- :Bwlchygroes
- :Bynea (electoral ward)
- :C'mon Midffîld!
- :CAFOD
- :CCB Centre for Sporting Excellence
- :CPC Bears
- :Cabinet Secretary for North Wales
- :Cabinet Secretary for Rural Affairs (Wales)
- :Cad Goddeu
- :Cadafael, King of Gwynedd
- :Cadair Berwyn
- :Cadair Berwyn North Top
- :Cadair Fawr
- :Cadell ap Gruffydd
- :Cadfael (TV series)
- :Cadfan Stone
- :Cadfan ap Cadwaladr
- :Cadoc (electoral ward)
- :Cadole
- :Cadoxton-juxta-Neath
- :Cadoxton Court Dovecote
- :Cadoxton River
- :Cadoxton railway station
- :Cadwaladr
- :Cadwallader Owen
- :Cadwallon ap Cadfan
- :Cae Llwyd Reservoir
- :Cae Mabon
- :Caeau Ffos Fach
- :Caeau Pant-y-Bryn
- :Caego
- :Caer Bach
- :Caer Drewyn
- :Caer Euni
- :Caer Llan
- :Caer Llugwy
- :Caer Lêb
- :Caer y Twr
- :Caerau, Cardiff
- :Caerdroia
- :Caerdydd (TV series)
- :Caerfai Bay
- :Caerfanell
- :Caerfyrddin (UK Parliament constituency)
- :Caergwrle Bowl
- :Caergwrle railway station
- :Caerhendy transmitting station
- :Caerhowel Bridge
- :Caerhun
- :Caerleon Comprehensive School
- :Caerleon Endowed School
- :Caerleon Roman Fortress and Baths
- :Caerleon railway station
- :Caernarfon Airport
- :Caernarfon Barracks
- :Caernarfon Criminal Justice Centre
- :Caernarfon Deanery
- :Caernarfon Mithraeum
- :Caernarfon Wanderers F.C.
- :Caernarvon (Morfa) railway station
- :Caernarvon railway station
- :Caernarvonshire Constabulary
- :Caerphilly County Borough Council
- :Caerphilly Food Festival
- :Caerphilly RFC
- :Caerphilly railway station
- :Caersws
- :Caersws F.C.
- :Caersws railway station
- :Caerwent Training Area
- :Caerwys
- :Caerwys Town Hall
- :Caesar Jenkyns
- :Caia Park
- :Cairn Newton-Evans
- :Caitlin Lewis
- :Calchfynydd
- :Caldey Lighthouse
- :Caldey Priory
- :Caldicot
- :Caldicot Castle (electoral ward)
- :Caldicot School
- :Caldicot and Wentloog Levels
- :Caldicot railway station
- :Caleb Rees
- :Calfaria Baptist Chapel, Llanelli
- :Calfaria Chapel, Abercynon
- :Calfaria Chapel, Penygroes
- :Callum Jones (footballer, born 2001)
- :Callum Jones (footballer, born 2002)
- :Callum King-Harmes
- :Callum Scott Howells
- :Calon FM
- :Calum Jarvis
- :Calvert's Engine
- :Cambergi quarry
- :Cambrian Airways
- :Cambrian Coast Express
- :Cambrian Colliery
- :Cambrian Miners' Association
- :Cambrian Woollen Mill
- :Cambro-Normans
- :Cameron Congreve
- :Cameron Toshack
- :Campaign for National Parks
- :Campanile, Portmeirion
- :Campbell's Platform railway station
- :Camrose, Pembrokeshire
- :Camrose, Pembrokeshire (electoral ward)
- :Canada at the 1958 British Empire Games
- :Canaston Bridge
- :Candelas (band)
- :Canoe Wales
- :Canolfan Soar
- :Cantref Gwarthaf (Dyfed)
- :Cantref Reservoir
- :Capel-y-ffin
- :Capel Als, Llanelli
- :Capel Bangor railway station
- :Capel Celyn
- :Capel Eidalwyr
- :Capel Heol Awst, Carmarthen
- :Capel Heol Dŵr, Carmarthen
- :Capel Newydd, Nanhoron
- :Capel Peniel
- :Capel Salem, Llanbedr
- :Capet–Plantagenet feud
- :Capital North West & Wales
- :Capital Tower, Cardiff
- :Capitol Centre, Cardiff
- :Capriccio (Rex Whistler)
- :Captain Beany
- :Cara Hope
- :Caradoc
- :Caradoc Evans
- :Caradoc of Llancarfan
- :Caradog Prichard
- :Caradog Roberts
- :Caradog ap Bran
- :Caradog ap Meirion
- :Carantoc
- :Cardiff Amateur Athletic Club
- :Cardiff Athletic Bowls Club
- :Cardiff Athletics Stadium
- :Cardiff Bay Barrage
- :Cardiff Bay Development Corporation
- :Cardiff Bay Opera House
- :Cardiff Bay Police Station
- :Cardiff Bay Visitor Centre (1991–2010)
- :Cardiff Blitz
- :Cardiff Centenary Walk
- :Cardiff City Blue Dragons
- :Cardiff Coloured Men's Christian Association
- :Cardiff Corinthians F.C.
- :Cardiff Cricket Club
- :Cardiff Cross Challenge
- :Cardiff Crown Court
- :Cardiff Deanery
- :Cardiff Design Festival
- :Cardiff East (UK Parliament constituency)
- :Cardiff Empire
- :Cardiff Half Marathon
- :Cardiff Heliport
- :Cardiff High School
- :Cardiff International Sports Village
- :Cardiff International White Water
- :Cardiff Lions
- :Cardiff Met Archers
- :Cardiff Metropolitan University F.C.
- :Cardiff Newsagent Three
- :Cardiff Roller Collective
- :Cardiff Roman Fort
- :Cardiff Rural District
- :Cardiff Sailing Centre
- :Cardiff School of Law and Politics
- :Cardiff Start
- :Cardiff Team
- :Cardiff Town Hall
- :Cardiff United Synagogue
- :Cardiff University School of Music
- :Cardiff University Students' Union
- :Cardiff Waterbus
- :Cardiff West Community High School
- :Cardiff West services
- :Cardiff urban area
- :Cardigan Bay Seafood Festival
- :Cardigan Guildhall
- :Cardigan Island
- :Cardigan River and Food Festival
- :Cardigan Welsh Corgi
- :Cardigan and District Community Hospital
- :Cardigan railway station
- :Cardigan transmitting station
- :Carew, Pembrokeshire
- :Carew (electoral ward)
- :Carew Castle
- :Carey Morris
- :Carillons (Williams)
- :Carl Llewellyn
- :Carl Roberts (cricketer)
- :Carl Sargeant
- :Carlisle Castle Hotel
- :Carmarthen Bank
- :Carmarthen Borough Council
- :Carmarthen Deanery
- :Carmarthen Dragons
- :Carmarthen Furnace Bank
- :Carmarthen Guildhall
- :Carmarthen Priory
- :Carmarthen Town North
- :Carmarthen Town South
- :Carmarthen Town West
- :Carmarthen railway station
- :Carmarthen transmitting station
- :Carmarthenshire Land Sailing Club
- :Carmel Chapel, Penrhiwceiber
- :Carmel Chapel, Trecynon
- :Carmel Napier
- :Carmel National Nature Reserve
- :Carmel transmitting station
- :Carn Llidi
- :Carnarvon (Pant) railway station
- :Carnarvon United F.C.
- :Carnarvon and Denbigh Herald
- :Carndochan Castle
- :Carneddau ponies
- :Carnllundain
- :Carno railway station
- :Carole Seymour-Jones
- :Caroline Street (Cardiff)
- :Carolyn Harris
- :Carreg Cadno
- :Carreg Cennen Disturbance
- :Carreg Dwfn
- :Carreg Samson
- :Carrie Jones (footballer)
- :Carry On Up the Khyber
- :Caryl Ap Rhys Pryce
- :Caryl Lewis
- :Caryl Thomas
- :Carys Bannister
- :Casey Thomas
- :Castell Aberlleiniog
- :Castell Bryn Gwyn
- :Castell Coch Woodlands and Road Section
- :Castell Du
- :Castell Gwallter
- :Castell Henllys
- :Castell Malgwyn
- :Castell Mawr Rock
- :Castell Meredydd
- :Castell Moel
- :Castell Nadolig
- :Castellan, Pembrokeshire
- :Castellau
- :Castle, Swansea
- :Castle (Abergavenny ward)
- :Castle Bank
- :Castle Caereinion
- :Castle Farmhouse, Raglan
- :Castle Hotel, Conwy
- :Castle Hotel, Ruthin
- :Castle House, Usk
- :Castle Nimble
- :Castle Terrace, Chepstow
- :Castle Tump
- :Castlebythe
- :Castleland
- :Castlemartin, Pembrokeshire
- :Castlemartin Hundred
- :Castlemorris
- :Catfish and the Bottlemen
- :Cath Palug
- :Cathays (electoral ward)
- :Cathays Cemetery
- :Cathedine
- :Catherine Fisher
- :Catherine Glyn Davies
- :Catherine Margretta Thomas
- :Catherine Thomas
- :Catherine Tregenna
- :Cathole Cave
- :Catholic Bishops' Conference of England and Wales
- :Catholic Record Society
- :Catrin Collier
- :Catrin Dafydd
- :Catrin Finch
- :Catrin Stewart
- :Catrin Thomas
- :Catrin ferch Gruffudd ap Hywel
- :Cawdor Hall
- :Cedewain
- :Cedryn Quarry Tramway
- :Cefin Campbell
- :Cefn-coed-y-cymmer
- :Cefn-y-Bedd railway station
- :Cefn Blaenau
- :Cefn Bryn
- :Cefn Carnedd
- :Cefn Cil Sanws
- :Cefn Coed Hospital
- :Cefn Cribwr
- :Cefn Cul
- :Cefn Cyfarwydd
- :Cefn Druids A.F.C.
- :Cefn Eglwysilan
- :Cefn Gwyngul
- :Cefn Hirgoed
- :Cefn Ila
- :Cefn Mably
- :Cefn Manmoel
- :Cefn Mawr
- :Cefn Meiriadog
- :Cefn Sidan
- :Cefn Viaduct, Wrexham
- :Cefni Hospital
- :Cefnllys
- :Cefnpennar
- :Cefntilla Court
- :Cei Llydan railway station
- :Ceibwr Bay
- :Ceiniog
- :Ceinwen Rowlands
- :Ceiriog Ucha
- :Celia Barlow
- :Celtic Challenge
- :Celtic Classic
- :Celtic Congress
- :Celtic Cup (2018 rugby union tournament)
- :Celtic longboat
- :Celtica (visitor centre)
- :Celtica Radio
- :Cemaes
- :Cemaes Rural District
- :Cemais (Dyfed)
- :Cemais Is Nyfer
- :Cemais Uwch Nyfer
- :Cemlyn Bay and lagoon
- :Cemmaes railway station
- :Cemmes Road railway station
- :Cenarth
- :Cenarth (electoral ward)
- :Census Act 1800
- :Centre for Health and International Relations
- :Centre for Occupational and Health Psychology
- :Centre for Welsh Studies
- :Ceredigion & Mid Wales NHS Trust
- :Ceredigion Archives
- :Ceredwen
- :Ceri Morgan
- :Cerrigydrudion
- :Cerys Hale
- :Cewydd
- :Chad Bond
- :Chain Bridge (Berwyn)
- :Chamberlain of North Wales
- :Chapel Bay Fort
- :Chapel Farmhouse, Llanarth
- :Chapel House, Monmouth
- :Chapel of St Non
- :Chapter Arts Centre
- :Charity Commission for England and Wales
- :Charles Ashton (historian)
- :Charles Danby
- :Charles Edwards (Labour politician)
- :Charles Edwards (writer)
- :Charles Edwin (died 1756)
- :Charles Edwin (died 1801)
- :Charles Evan-Thomas
- :Charles Griffith-Wynne
- :Charles Hanbury-Tracy, 1st Baron Sudeley
- :Charles Hanbury Williams
- :Charles Harington (chemist)
- :Charles Langbridge Morgan
- :Charles Lewis (rugby union)
- :Charles Lloyd (minister)
- :Charles Morgan (Breconshire MP, born 1736)
- :Charles Reece Pemberton
- :Charles Sidney Beauclerk
- :Charles Symmons
- :Charles Taylor (rugby union)
- :Charlie Jones (footballer, born 1899)
- :Charlie Pritchard
- :Charlie Savage (footballer)
- :Charlotte Godley
- :Chartist Mural
- :Chartist Tower
- :Chateau Rhianfa
- :Cheese Market, Hay-on-Wye
- :Chepstow Community Hospital
- :Chepstow Museum
- :Chepstow Port Wall
- :Chepstow RFC
- :Chepstow Town Gate
- :Chepstow War Memorial
- :Chepstow railway station
- :Cheryl Beer
- :Cheryl Foster
- :Chester and Connah's Quay Railway
- :Chester and Wrexham Turnpike
- :Chicago Tafia
- :Chicago Welsh Societies
- :Chief Whip (Wales)
- :Children's Commissioner for Wales
- :Children (Abolition of Defence of Reasonable Punishment) (Wales) Act 2020
- :Chirk Community Hospital
- :Chirk Tunnel
- :Chirk Viaduct
- :Chirk War Memorial
- :Chirk railway station
- :Chloe Williams (footballer)
- :Chloe Williams (golfer)
- :Choosing the Common Good
- :Chris Bromham
- :Chris Evans (footballer)
- :Chris Hallam
- :Chris Jenkins (boxer)
- :Chris Rees
- :Chris Rees (badminton)
- :Chris Ruane
- :Chris Slade
- :Chris Tally Evans
- :Chris Twiddy
- :Christ Tshiunza
- :Christ the Word Catholic School
- :Christchurch, Newport
- :Christian Norton
- :Christine Gwyther
- :Christine Jones (artist)
- :Christine Pritchard
- :Christopher Dawson
- :Christopher J. Yorath
- :Christopher Love
- :Christopher Rees
- :Church Bay, Anglesey
- :Church Farmhouse, Caldicot
- :Church Farmhouse, Kemeys Commander
- :Church Island (Anglesey)
- :Church Road (B&MJR) railway station
- :Church Stoke
- :Church Street, Monmouth
- :Church Village
- :Church of All Saints, Kemeys Commander
- :Church of All Saints, Llanelli
- :Church of Our Lady and St Michael, Abergavenny
- :Church of St Basil, Bassaleg
- :Church of St Denys, Lisvane
- :Church of St Dogfael, Meline
- :Church of St Illtyd, Mamhilad
- :Church of St Illtyd, Penrice
- :Church of St Margaret Marloes, Eglwyscummin
- :Church of St Mary Magdalene, Goldcliff
- :Church of St Mary and St Michael, Llanarth
- :Church of St Mary the Virgin, Halkyn
- :Church of St Mary the Virgin, Llanfair Kilgeddin
- :Church of St Maughan, Llangattock Vibon Avel
- :Church of St Michael, Cilycwm
- :Church of St Michael and All Angels, Aberystwyth
- :Church of St Michael and All Angels, Castlemartin, Pembrokeshire
- :Church of St Michael and All Angels, Gwernesney
- :Church of St Nefydd and St Mary, Llannefydd
- :Church of St Nicholas, Grosmont
- :Church of St Nicholas, Trellech
- :Church of St Oudoceus, Llandogo
- :Church of St Peter, St Paul and St John, Llantrisant
- :Church of St Stephen and St Tathan, Caerwent
- :Church of St Thomas, Redwick
- :Church of St Thomas a Becket, Shirenewton
- :Church of St Thomas à Becket, Wolvesnewton
- :Church of St Tysilio and St Mary, Meifod
- :Church of the Holy Cross, Kilgwrrwg
- :Church of the Holy Cross, Mwnt
- :Church of the Resurrection, Ely
- :Chwarae Teg
- :Chwarel Ddu quarry
- :Cigfa
- :Cilan Head
- :Cilcain
- :Cilfrew television relay station
- :Cilfynydd
- :Cilgerran Castle
- :Cilgerran Hundred
- :Cilgwyn quarry
- :Ciliau-Aeron Halt railway station
- :Cilrhedyn
- :Cilthriew, Kerry (Montgomeryshire)
- :Cilybebyll
- :Cilycwm transmitting station
- :Cilymaenllwyd
- :Cimla
- :Cinema of Wales
- :Circuit court
- :Circuit of Wales
- :Circuits of England and Wales
- :Civil Mediation Council
- :Civil Service (Wrexham) Cricket and Football Club
- :Claims management company
- :Claire Jones (harpist)
- :Claire Skinner (footballer)
- :Clandestine Marriages Act 1753
- :Clara Novello Davies
- :Clarbeston
- :Clarbeston Road and Letterston Railway
- :Clarbeston Road railway station
- :Claud Morris
- :Claudy Philips
- :Clausen Rolling Platform
- :Clawdd-du
- :Clawdd Coch
- :Clayton Blackmore
- :Clayton Milborne
- :Cleddau Bridge
- :Cleddon Bog
- :Cleddon Hall
- :Cledwyn Hughes (author)
- :Cleft chin murder
- :Clegir Mawr
- :Clegyr Boia
- :Clem Thomas
- :Clera
- :Cliff Pritchard
- :Cliff Williams (rugby union, born 1898)
- :Clifford Darby
- :Clifford Evans (actor)
- :Clive Rowlands
- :Clive Shell
- :Clocaenog Forest
- :Clogau Gold Mine
- :Clogwyn Du'r Arddu
- :Clogwyn railway station
- :Clough Williams-Ellis
- :Clunderwen railway station
- :Cluniac priories in Great Britain
- :Clwb Ifor Bach
- :Clwb Rygbi
- :Clwt-y-bont
- :Clwyd South (UK Parliament constituency)
- :Clwydian Way
- :Clydach, Monmouthshire
- :Clydach, Swansea
- :Clydach Gorge
- :Clydach House, Llanelly
- :Clydach railway station
- :Clydau
- :Clydog
- :Clynderwen
- :Clyne Castle
- :Clyne Gardens
- :Clyne River
- :Clyne Valley Country Park
- :Clytha Castle
- :Coal Exchange
- :Coalbrookvale
- :Cobden's Hotel
- :Cobourg Hotel
- :Cockett
- :Cockett railway station
- :Coed-y-gelli, Llanarth
- :Coed Coch
- :Coed Cochion Quarry
- :Coed Cwm Einion
- :Coed Nant Mawr
- :Coed y Bedw
- :Coedcanlas
- :Coedffranc West
- :Coedty Reservoir
- :Cofi dialect
- :Cogan railway station
- :Colbren Junction railway station
- :Colby Woodland Garden
- :Cold Blow
- :Cold Inn
- :Coldbrook Park
- :Coleford, Monmouth, Usk and Pontypool Railway
- :Coleg Cambria
- :Coleg Cymraeg Cenedlaethol
- :Coleg Cymunedol Y Dderwen
- :Coleg Glan Hafren
- :Coleg Llandrillo
- :Coleg Sir Gâr
- :Colin Gale
- :Colin H. Williams
- :Colin Jones (artist)
- :Colin Stephens
- :Colin Woods
- :Collen
- :Colwinston
- :Colwyn Bay Community Hospital
- :Colwyn Bay Deanery
- :Colwyn Bay F.C.
- :Colwyn Bay railway station
- :Commercial Street, Newport
- :Commission on Justice in Wales
- :Commissioner of Bankruptcy (England and Wales)
- :Commote
- :Community Archives Wales
- :Compton Census
- :Con Passionate
- :Conan Meriadoc
- :Congar of Congresbury
- :Conglog quarry
- :Connah's Quay F.C.
- :Connor Evans (footballer)
- :Connor Lemonheigh-Evans
- :Connor Morgans
- :Conscientious objectors in Wales
- :Constables' Central Committee
- :Constitution Hill, Aberystwyth
- :Construction History Society
- :Contact Centre Cymru
- :Conway Road Methodist Church
- :Conway and Llanrwst Railway
- :Conwil railway station
- :Conwy (Assembly constituency)
- :Conwy (electoral ward)
- :Conwy Bay
- :Conwy Borough F.C.
- :Conwy Celts
- :Conwy Falls
- :Conwy Guildhall
- :Conwy Hospital
- :Conwy Suspension Bridge
- :Conwy Town Council
- :Conwy railway station
- :Cool Cymru
- :Copthorne Hotel, Cardiff
- :CorCenCC
- :Coraniaid
- :Corbett Arms Hotel
- :Corgi Socks
- :Corn Du
- :Corndon Hill
- :Corntown
- :Corporate Joint Committee
- :Corpus Christi Roman Catholic High School, Cardiff
- :Corris
- :Corris Craft Centre
- :Cors Bodwrog
- :Cors Fochno
- :Cors Gyfelog National Nature Reserve
- :Corwen
- :Corwen East railway station
- :Cory Band
- :Cosheston
- :Cosheston Group
- :Council Offices, Caernarfon
- :County Hall, Aberaeron
- :County Hall, Caernarfon
- :County Hall, Carmarthen
- :County Hall, Cwmbran
- :County Hall, Dolgellau
- :County Hall, Haverfordwest
- :County Hall, Llandrindod Wells
- :County Hall, Mold
- :County Hall, Ruthin
- :County of Pembroke War Memorial
- :Court (Barry electoral ward)
- :Court Colman Manor
- :Court Farm Barn, Llanthony Priory
- :Court Farmhouse, Llanover
- :Court Farmhouse, Llanthony
- :Court of Criminal Appeal (England and Wales)
- :Courtney Keight
- :Cow (public service announcement)
- :Cowbois ac Injans
- :Cowbridge (electoral ward)
- :Cowbridge Comprehensive School
- :Cowbridge Cricket Ground
- :Cowbridge Food and Drink Festival
- :Cowbridge Physic Garden
- :Cowbridge Town Hall
- :Cowbridge railway station
- :Cowbridge town wall
- :Coychurch
- :Coygan Cave
- :Craig-Cefn-Parc television relay station
- :Craig-y-Don
- :Craig-y-parc House
- :Craig Gwrtheyrn
- :Craig Thomas (author)
- :Craig Ty-Isaf
- :Craig y Forwyn (Conwy)
- :Craig y Llyn
- :Craig y Mor
- :Craig yr Aderyn
- :Creative Lives
- :Creiddylad
- :Creigiau
- :Creigiau & St Fagans
- :Creigiau Gleision
- :Creirwy
- :Cresselly Cricket Club Ground
- :Cresselly House
- :Cribinau
- :Criccieth
- :Criccieth railway station
- :Crichel Down affair
- :Crick, Monmouthshire
- :Crickhowell Castle
- :Crickhowell Market Hall
- :Criggion Radio Station
- :Crime Survey for England and Wales
- :Crimea Pass
- :Crinow
- :Cristin verch Goronwy
- :Croes-goch
- :Croes Newydd
- :Croes Robert Wood
- :Croeserw
- :Croesor Tramway
- :Croesyceiliog
- :Croesyceiliog School
- :Croft-Y-Bwla
- :Croft Farm Barn, Llantilio Crossenny
- :Cross-border derby
- :Cross Britain Way
- :Cross at Croes Llwyd Farm
- :Crosskeys
- :Crosskeys railway station
- :Crossways Halt railway station
- :Crosswell
- :Crow Rock
- :Crown green bowls
- :Crug Mawr
- :Crugybar
- :Crumlin, Caerphilly
- :Crundale, Pembrokeshire
- :Crunwere
- :Crymlyn Bog
- :Crymlyn Burrows
- :Crymmych Arms railway station
- :Crynant
- :Crys
- :Crûg Farm Quarry
- :Cuffern Manor, Pembrokeshire
- :Cuisine of Ceredigion
- :Culhwch
- :Culhwch and Olwen
- :Culverhouse Cross
- :Curig
- :Curriculum and Assessment (Wales) Act 2021
- :Curtis Hutson (footballer)
- :Cuthbert Taylor
- :Cwm, Blaenau Gwent
- :Cwm-y-glo
- :Cwm-yr-Eglwys
- :Cwm Bwchel Farmhouse, Llanthony
- :Cwm Cadnant
- :Cwm Clydach, Rhondda Cynon Taf
- :Cwm Dyli
- :Cwm Ebol quarry
- :Cwm Gwaun
- :Cwm Hengae
- :Cwm Prysor Viaduct
- :Cwm Twrch
- :Cwm railway station
- :Cwmafan
- :Cwmaman
- :Cwmamman
- :Cwmbran bus station
- :Cwmbran railway station
- :Cwmbran railway station (Great Western Railway)
- :Cwmbwrla
- :Cwmcarn
- :Cwmcarn High School
- :Cwmcych
- :Cwmdare
- :Cwmdu, Powys
- :Cwmerfyn
- :Cwmfelin Mynach
- :Cwmgors
- :Cwmgors transmitting station
- :Cwmgwili
- :Cwmifor
- :Cwmmawr railway station
- :Cwmorthin Tramway
- :Cwmparc
- :Cwmpengraig
- :Cwmtillery
- :Cwmtwrch
- :Cwmyoy
- :Cwmystwyth Mines
- :Cwrt Sart Comprehensive School
- :Cwrt y Brychan barn, stable and granary
- :Cwt y Bugail quarry
- :Cwtch
- :Cwyllog
- :Cyfarthfa High School
- :Cyfeiliog
- :Cylch-y-Garn
- :Cyllin
- :Cymanfa Ganu
- :Cymer Afan Comprehensive School
- :Cymerau quarry
- :Cymidei Cymeinfoll
- :Cymru Goch
- :Cymru North
- :Cymru Terrane
- :Cynan Dindaethwy
- :Cynan Garwyn
- :Cynan ab Iago
- :Cyncoed
- :Cyngar of Llangefni
- :Cynghanedd
- :Cynidr
- :Cynon ap Clydno
- :Cynwyl Elfed transmitting station
- :Cyril Fox
- :Cyril Sidlow
- :Cyrniau Nod
- :Cysgod Rhyfel
- :Côr Meibion Pontypridd
- :Côr Tewdws
- :Cŵn Annwn
- :Dafydd Gam
- :Dafydd Hughes
- :Dafydd Huws
- :Dafydd Jenkins (legal scholar)
- :Dafydd Llywelyn
- :Dafydd Nicolas
- :Dafydd Rowlands
- :Dafydd Trystan Davies
- :Dafydd ab Owain Gwynedd
- :Dafydd ap Dafydd ap Llywelyn
- :Dafydd ap Gwilym Society
- :Dai Davies (journalist)
- :Dai Davies (politician)
- :Dai Dower
- :Dai Havard
- :Dai Jones
- :Dai St. John
- :Dai Thomas (footballer, born 1975)
- :Dai Woodham
- :Dale, Pembrokeshire
- :Dale Castle
- :Dale Marshall (painter)
- :Dale McIntosh
- :Damian Green
- :Dan John
- :Dan Lewis (footballer)
- :Dan Rees (rugby)
- :Dan yr Ogof
- :Danescourt
- :Dani Rowe
- :Daniel Barden (footballer)
- :Daniel Chandler
- :Daniel Davies (preacher)
- :Daniel Grey
- :Daniel James (footballer)
- :Daniel Jones (composer)
- :Daniel Morden
- :Daniel Protheroe
- :Daniel Silvan Evans
- :Daniel Williams (footballer, born 2001)
- :Daniel Williams (theologian)
- :Dannie Abse
- :Danny Ansell
- :Danny Canning
- :Danny Collins (footballer)
- :Danny Williams (footballer, born 1979)
- :Dare Valley Country Park
- :Darklands (film)
- :Daronwy Isaac
- :Darran Harris
- :Darran Rowbotham
- :Darran and Deri railway station
- :Darranlas
- :Darren Jones (footballer)
- :Darren Tinson
- :Dave Griffiths (boxer)
- :Dave Richards (footballer, born 1993)
- :David Adams (Congregationalist divine)
- :David Alexander (singer)
- :David Anthony (wheelchair rugby)
- :David Bell (artist)
- :David Beynon (teacher)
- :David Bower
- :David Brazell
- :David Cecil (courtier)
- :David Charles (hymn-writer)
- :David Constable (artist)
- :David Cornell
- :David Crouch (historian)
- :David Daniel (rugby union)
- :David Davies (Dai'r Cantwr)
- :David Davies (Welsh actor)
- :David Davies (dairyman)
- :David Davies (industrialist)
- :David Davis, Blaengwawr
- :David Eirwyn Morgan
- :David Ellis (priest)
- :David Elwyn Jones
- :David Evan Jones (missionary)
- :David Evans (archivist)
- :David Evans (canon at St Asaph)
- :David Evans (department store)
- :David Ffrangcon-Davies
- :David G. Watts
- :David Griffiths (portrait painter)
- :David Hughes (Eos Iâl)
- :David Hughes (priest)
- :David Jenkins (composer)
- :David Jenkins (librarian)
- :David John (Mormon)
- :David Jones (Clwyd West MP)
- :David Jones (Dean of Llandaff)
- :David Jones (Llangan)
- :David Jones (darts player)
- :David Jones (rugby, born 1881)
- :David Lewis (Anglican priest, born 1760)
- :David Lewis (archdeacon of Carmarthen)
- :David Lewis (lawyer)
- :David Lewis (poet)
- :David Lewis (priest, born 1814)
- :David Llewellin
- :David Llewellyn (author)
- :David Lloyd (Dean of St Asaph)
- :David Lloyd (cricketer, born 1992)
- :David Lloyd (judge)
- :David Lloyd (priest)
- :David Lloyd Davies
- :David Miall Edwards
- :David Morgan (department store)
- :David Morgan (trade unionist)
- :David Morris & Sons
- :David Morris (bishop)
- :David Nott
- :David Owen Morgan
- :David Petersen (sculptor)
- :David Powel
- :David Price (Welsh Independent minister)
- :David Prosser (bishop)
- :David Pugh (British politician)
- :David Randell
- :David Rocyn-Jones
- :David Rowland (translator)
- :David Rowlands (Dewi Môn)
- :David Rowlands (politician)
- :David Samwell
- :David Tegfan Davies
- :David Thomas (British politician)
- :David Thomas (archdeacon of Montgomery)
- :David Thomas (jeweller)
- :David Thomas (missionary priest)
- :David Thomas Gwynne-Vaughan
- :David Thomas Jones (administrator)
- :David Thomson (footballer, born 1847)
- :David Vaughan (architect)
- :David Wilbourne
- :David William Evans
- :David Williams (Liberal politician)
- :David Williams (crime writer)
- :David Williams (philosopher)
- :David Williams (pirate)
- :Davis (surname)
- :Dawn Bowden
- :Day Trip to Bangor (Didn't We Have a Lovely Time)
- :Dduallt railway station
- :De Barry family
- :De Lundin
- :Deanery of Cedewain
- :Deceangli
- :Declan Smith
- :Deddie Davies
- :Dee Estuary
- :Deeside College
- :Deeside Community Hospital
- :Defensible Barracks, Pembroke Dock
- :Defynnog
- :Defynnog Yew
- :Deganwy railway station
- :Deiniol (electoral ward)
- :Deiniolen
- :Deirdre Hine
- :Della Jones
- :Delme Bryn-Jones
- :Delyth Jewell
- :Demetae
- :Denbigh Castle and town walls
- :Denbigh Cockpit
- :Denbigh Community Hospital
- :Denbigh Friary
- :Denbigh Moors
- :Denbigh Town F.C.
- :Denbigh Town Hall
- :Denbighshire Coalfield
- :Denbighshire Constabulary
- :Denise Idris Jones
- :Dennis Avoth
- :Dennis Powell (boxer)
- :Denny Island
- :Derec Llwyd Morgan
- :Derek Bevan
- :Derek Hodgson (trade unionist)
- :Derek Jones (civil servant)
- :Derek Tapscott
- :Derek Vaughan
- :Derrero
- :Derry Ormond Tower
- :Derwyddon Dr Gonzo
- :Deryn Rees-Jones
- :Desecration (band)
- :Desert of Wales
- :Desperate Poaching Affray
- :Deuddwr
- :Devauden
- :Devil's Appendix
- :Devil's Bridge
- :Devil's Bridge railway station
- :Dewi-Prys Thomas
- :Dewi "Pws" Morris
- :Dewi Emrys
- :Dewi Llwyd
- :Dewi Meirion Lewis
- :Dewi Penrhyn Jones
- :Dewisland
- :Dewstow House
- :Diana, Our Mother: Her Life and Legacy
- :Diana (locomotive)
- :Diana Morgan (screenwriter)
- :Dibleys Nurseries
- :Dic Edwards
- :Dic Siôn Dafydd
- :Dick Lewis (politician)
- :Dick Power
- :Dilys Glynne Jones
- :Din Dryfol
- :Din Lligwy
- :Dinas Cross
- :Dinas Dinlle
- :Dinas Island
- :Dinas Powys (electoral ward)
- :Dinas Powys railway station
- :Dinas railway station
- :Dinefwr Sharks
- :Dingad of Llandingat
- :Dingestow
- :Dingle Road railway station
- :Dinorwic Railway
- :Dinorwic quarry
- :Diocese of Bangor
- :Diphwys Casson quarry
- :Director of Public Prosecutions (England and Wales)
- :Disappearance of Trevaline Evans
- :Diverse Vinyl
- :Divorce in England and Wales
- :Dixton
- :Do Lectures
- :Dog Stone, Mynydd Varteg
- :Dolbadarn Castle (Turner)
- :Doldowlod railway station
- :Dolforgan Hall
- :Dolgarrog railway station
- :Dolgellau Deanery
- :Dolgellau and Barmouth Hospital
- :Dolgellau transmitting station
- :Dolgoch (locomotive)
- :Dolwyddelan
- :Dolygaer railway station
- :Domenick Davies
- :Don Dearson
- :Don Skene
- :Donald Braithwaite
- :Donald Evans (Welsh poet)
- :Donald Houston
- :Dormarch
- :Dorothea quarry
- :Dorothy Simpson
- :Dorothy Squires
- :Douglas (locomotive)
- :Douglas Chamberlain
- :Douglas Gowan
- :Dovey Junction railway station
- :Downing Hall
- :Dragon's Heart Hospital
- :Dragon Park
- :Dragon Ride Wales
- :Drainage district
- :Drefach Group
- :Drew Sherman
- :Dripping cake
- :Driscoll and Rowlands
- :Drostre Bank
- :Drovers' road
- :Drybridge (Monmouth ward)
- :Drybridge House, Monmouth
- :Duane Jones (snooker player)
- :Duke of Beaufort
- :Dulas Bay
- :Dulas Bridge
- :Dungleddy
- :Dunraven Castle
- :Dunvant
- :Dunvant Male Choir
- :Dwynwen
- :Dyddgu Hywel
- :Dyfan
- :Dyffryn, Vale of Glamorgan
- :Dyffryn Ardudwy
- :Dyffryn Clydach
- :Dyffryn School
- :Dyfi Bridge
- :Dyfi Estuary Mudflats
- :Dyfi Osprey Project
- :Dyfi Valley Way
- :Dyfnant Forest
- :Dyfnwal Moelmud
- :Dyfodwg
- :Dylan Thomas Prize
- :Dylife
- :Dylife Gorge
- :Dyne Steel Incline
- :Dynea Halt railway station
- :Dynevor School, Swansea
- :Dyserth
- :Dyserth branch line
- :Dŵr Cymru Welsh Water
- :E. G. Bowen
- :E. Gwyndaf Evans
- :Eagles Meadow
- :Earl Cawdor
- :Earl Stanhope
- :Earl of Plymouth
- :Earl of Powis
- :Early modern period in Wales
- :East Carmarthenshire (UK Parliament constituency)
- :East Glamorganshire (UK Parliament constituency)
- :East Williamston
- :Eastbrook railway station
- :Eastington Manor Tower
- :Ebbw Vale (High Level) railway station
- :Ebbw Vale (Low Level) railway station
- :Ebbw Vale (UK Parliament constituency)
- :Ebbw Vale Parkway railway station
- :Ebbw Vale RFC
- :Ebbw Vale Town railway station
- :Ebbw Vale bus station
- :Ebeneser Chapel, Ammanford
- :Ebenezer Baptist Chapel, Llandovery
- :Ebenezer Chapel, Aberavon
- :Ebenezer Chapel, Llanelli
- :Ebenezer Chapel, Trecynon
- :Ectogram
- :Ed Shervington
- :Eddie Beach
- :Eddie Dennis
- :Eddie James (rugby union)
- :Eddie Ladd
- :Eddie Niedzwiecki
- :Edern ap Nudd
- :Edgar Evans (tenor)
- :Edgar Jones (politician)
- :Edgar Phillips
- :Edgar Thomas (footballer)
- :Edith Parnell
- :Edith of Mercia
- :Edmund Meyrick
- :Edmund Meyricke (MP)
- :Edmund Swetenham
- :Edmund de Bromfield
- :Educating Cardiff
- :Education and Learning Wales
- :Edward Barnes (poet and translator)
- :Edward Barnwell
- :Edward Davies Memorial Chemistry Laboratories
- :Edward Edwards (priest, died 1783)
- :Edward Edwards (zoologist)
- :Edward Ernest Hughes
- :Edward Foulkes
- :Edward Greenly
- :Edward H. Dafis
- :Edward Haycock Sr.
- :Edward Hughes (poet)
- :Edward James (priest)
- :Edward John Hutchins
- :Edward Jones (Methodist preacher)
- :Edward Jones (bishop)
- :Edward M. Lewis
- :Edward Matthews (author)
- :Edward Millward
- :Edward Morgan (priest)
- :Edward Naylor-Leyland
- :Edward Owen (translator)
- :Edward Pegge
- :Edward Phillips (cricketer, born 1883)
- :Edward Pierce (priest)
- :Edward Richard
- :Edward Roderick Davies
- :Edward Samuel
- :Edward Stephen
- :Edward Thomas (locomotive)
- :Edward Vaughan (bishop)
- :Edward Vaughan (died 1683)
- :Edward Willes (bishop)
- :Edward Williamson
- :Edward Wynne (chancellor)
- :Edwin Cross
- :Edwin Hughes (soldier)
- :Edwin Octavius Tregelles
- :Edwin Regan
- :Edwin Rowlands
- :Edwin Thomas Maynard
- :Edwyn Cynrig Roberts
- :Efail Fach television relay station
- :Eglwys Brewis
- :Eglwys Nunydd
- :Eglwysbach
- :Eglwyseg
- :Eglwysilan
- :Eglwyswen
- :Eglwyswrw
- :Ehud Rogers
- :Eifion Evans (church historian)
- :Eifionydd
- :Eight-Arch Bridge
- :Eigiau Tramway
- :Eigra Lewis Roberts
- :Einion Frenin
- :Einion ab Anarawd
- :Einion ab Owain
- :Einion ap Collwyn
- :Einir Dafydd
- :Eira Friesen
- :Eirian Llwyd
- :El Jones
- :El Sieco's
- :Eleanor Daniels
- :Eleanor de Braose
- :Elementary school (England and Wales)
- :Elen Evans
- :Elen Gwdman
- :Elen ferch Llywelyn
- :Elena Puw Morgan
- :Elenydd
- :Elephant and Castle, Wrexham
- :Eleri Morgan (comedian)
- :Eleri Rees
- :Elevate your sole
- :Elfael
- :Elfodd
- :Elfyn Evans
- :Elfyn Lewis
- :Elian (Welsh saint)
- :Elias Sydall
- :Elidir Fawr
- :Eliezer Williams
- :Elim Chapel, Cwmdare
- :Elim Independent Chapel, Carmarthen
- :Elin Williams
- :Elinor Snowsill
- :Elisabeth Bennett
- :Elisabeth Inglis-Jones
- :Elisabeth Whittle
- :Elise Hughes
- :Elisedd ap Cyngen
- :Elisedd ap Gwylog
- :Elizabeth Baker (diarist)
- :Elizabeth Ferrers
- :Elizabeth Haywood
- :Elizabeth Mortimer
- :Elizabeth Phillips Hughes
- :Elizabeth Treasure
- :Elizabeth Watkin-Jones
- :Elizabeth Watkin Jones
- :Ellen Evans
- :Ellen Hughes
- :Elli (electoral ward)
- :Elli Norkett
- :Ellis Evans
- :Ellis Owen
- :Ellis Owen Ellis
- :Ellis Pierce
- :Ellis Price
- :Eluned Parrott
- :Elvet Jones
- :Elvey MacDonald
- :Elway Bevin
- :Ely Hospital
- :Ely Main Line railway station
- :Ely Racecourse
- :Elynor Bäckstedt
- :Emergency planning in Wales
- :Emily Allen
- :Emily Hollinshead
- :Emily Huws
- :Emily Stone (writer)
- :Emlyn
- :Emma Jenkins
- :Emma Manners, Duchess of Rutland
- :Emma Wools
- :Emrys Evans
- :Emrys Jones (geographer)
- :Emrys Thomas
- :Emyr Humphreys
- :Energlyn & Churchill Park railway station
- :England (1813 ship)
- :English Baptist Church, Abercarn
- :English Baptist Church, Carmarthen
- :English Congregational Church, Carmarthen
- :English and Australian Copper Company
- :English and Welsh
- :English and Welsh bastardy laws
- :Englyn
- :Enoch Morrell
- :Enoch Salisbury
- :Environment Centre (Swansea)
- :Epistolae Ho-Elianae
- :Equally Cursed and Blessed
- :Erasmus Jones
- :Erasmus Lewes
- :Erasmus Saunders (priest, died 1724)
- :Erfyl
- :Eric James Watson
- :Eric Jones (climber)
- :Eriviat Hall
- :Ernest Salter Davies
- :Ernest William Jones
- :Ernest Willows
- :Ernest Zobole
- :Ernie Carless
- :Ernie Jenkins
- :Erwood railway station
- :Erwood transmitting station
- :Eryl Davies
- :Eryrys
- :Esclusham
- :Esgair Moel
- :Esme Lewis
- :Essential Skills Wales
- :Esso Refinery, Milford Haven
- :Estrons
- :Estyn
- :Estyn Griffiths
- :Ethel Lina White
- :Ether (band)
- :Etymology of Wales
- :Eubule Thelwall (politician)
- :Eufydd fab Dôn
- :Eunice Stallard
- :Eurig Wyn
- :Euros Bowen
- :Evan Davies (Myfyr Morganwg)
- :Evan Herber Evans
- :Evan James Williams
- :Evan Lewis (priest)
- :Evan Lloyd (poet)
- :Evan Lloyd (rugby union, born 2001)
- :Evan Lloyd Vaughan
- :Evan Mathew Richards
- :Evan Morgan, 2nd Viscount Tredegar
- :Evan Seys
- :Evan Shelby
- :Evan Thomas (inventor)
- :Evan Thomas Davies (cleric)
- :Evan Thomas Davies (musician)
- :Evan W. Evans
- :Evan Walters
- :Evangelical Presbyterian Church in England and Wales
- :Ewan Davies
- :Ewart Jones
- :Ewenny Pottery
- :Ewenny Priory House
- :Ewenny River
- :Ewenny and Pant Quarries
- :Ewloe
- :Ewyas
- :Express Motors
- :Eynon Evans
- :Eynon Hawkins
- :F. Gwendolen Rees
- :FC United of Wrexham
- :Fade Files
- :Faenol Festival
- :Fairbourne
- :Fairbourne Spit
- :Fairwater, Cardiff
- :Fairwater, Torfaen
- :Fairwood Hospital
- :Fairy Falls, Trefriw
- :Falcondale House
- :Fan Brycheiniog
- :Fan Bwlch Chwyth
- :Fan Fraith
- :Fan Hir
- :Fan y Big
- :Fanny Winifred Edwards
- :Fastnet Line
- :Fatal Accidents Act 1846
- :Fauna of Wales
- :Fay Ray (band)
- :February–March 2024 Welsh Labour leadership election
- :Felin Fach railway station
- :Felindre
- :Felindre Farchog
- :Felindyffryn Halt railway station
- :Felinfoel
- :Ferndale Colliery
- :Ferryside
- :Ferryside television relay station
- :Ffairfach
- :Ffaldybrenin
- :Fferm
- :Ffestiniog Memorial Hospital
- :Ffestiniog transmitting station
- :Ffion Bowen
- :Ffion Hague
- :Fflach
- :Fflur Dafydd
- :Fforest Fawr
- :Fforest Fawr Geopark
- :Fforestfach
- :Ffos-y-fran Land Reclamation Scheme
- :Ffos Las
- :Ffridd Faldwyn, Montgomery
- :Ffrith Beach
- :Ffynnon Llugwy
- :Ffynnon Sara
- :Ffynone House
- :Fiddler's Elbow National Nature Reserve
- :Fifteen Tribes of Wales
- :Fin Stevens
- :Fionn McLoughlin
- :Fire authority
- :Fireman Sam: The Great Fire of Pontypandy
- :Fireman Sam in Action
- :First Drakeford government
- :Fish Legal
- :Fishguard & Goodwick Marina
- :Fishguard Harbour railway station
- :Fishguard Town Hall
- :Fishguard Volcanic Group
- :Fishguard and Goodwick
- :Fishguard and Goodwick railway station
- :Fitzalan High School
- :Flag of Anglesey
- :Flag of Ceredigion
- :Flag of Merionethshire
- :Flag of the Church in Wales
- :Flash Morgan Webster
- :Flemingston
- :Flint Town Hall
- :Flint railway station
- :Flintshire Bridge
- :Flintshire Falcons
- :Flora Forster
- :Florence Booth
- :Florence Williams (rugby union)
- :Florrie Evans
- :Floyd Havard
- :Fochriw
- :Foel-fras
- :Foel Chwern
- :Foel Drygarn
- :Foel Fraith
- :Foel y Geifr
- :Folly Farm Adventure Park and Zoo
- :Folly Tower, Pontypool
- :Fonmon
- :Food Hygiene Rating (Wales) Act 2013
- :For Tinkerbell
- :Ford Bridgend Engine Plant
- :Forden
- :Forden Gaer
- :Forge Row, Cwmavon
- :Forge Side
- :Fort Hubberstone
- :Forté Project
- :Forward Wales
- :Foryd railway station
- :Four Crosses, Llanfair Caereinion
- :Foxhunter
- :Frampton, Vale of Glamorgan
- :Frances Bunsen
- :Frances Donovan
- :Frances Hughes
- :Francesco Serafino
- :Francis Davies (bishop)
- :Francis Evelyn
- :Francis Jones (historian)
- :Francis Mostyn (archbishop of Cardiff)
- :Frank Curtis
- :Frank Goodden
- :Frank Hancock
- :Frank Hoddinott
- :Frank Howel Evans
- :Frank Moody
- :Frank Shayler
- :Fred Evans (boxer)
- :Fred Mathias
- :Fred Roberts (RAF officer)
- :Fred Warren
- :Freddie Issaka
- :Frederick Higginson
- :Frederick John Alban
- :Frederick Lewis Davis
- :FreeBMD
- :Free Borough of Llanrwst
- :Free b
- :Freshwater East
- :Freystrop
- :Friars School, Bangor
- :Friends of Wales Caucus
- :Froncysyllte
- :Froncysyllte Male Voice Choir
- :Fronfraith Hall
- :Frongoch
- :Frongoch internment camp
- :Fulk Lloyd
- :Fulton House, Swansea
- :Funmi Oduwaiye
- :Funnybones
- :Future Generations Commissioner for Wales
- :GO Wales
- :Gabriel Powell
- :Gabriele Biancheri
- :Gabrielle Creevy
- :Gadlys (electoral ward)
- :Gadlys Chapel
- :Gaer Penrhôs
- :Gair Rhydd
- :Gallt y Wenallt
- :Game On (song)
- :Ganllwyd
- :Garden Village A.F.C.
- :Gareth Alban Davies
- :Gareth Allen
- :Gareth Baber
- :Gareth Bennett (politician)
- :Gareth Davies (rugby union, born 1955)
- :Gareth Evans (filmmaker)
- :Gareth F. Williams
- :Gareth Walters
- :Gareth Williams (rugby union, born 1981)
- :Garn-yr-erw
- :Garnddyrys Forge
- :Garndiffaith Viaduct
- :Garth, Bridgend
- :Garth Hill
- :Garth Stadium
- :Garth railway station (Bridgend)
- :Gartheiniog quarry
- :Garw/Ffaldau Colliery
- :Garw S.B.G.C.
- :Garw Valley
- :Garw Valley Railway
- :Gary Pickford-Hopkins
- :Gateholm
- :Gavelkind
- :Gavin Rees
- :Gaz Oakley
- :Geirionydd Rural District
- :Gele (electoral ward)
- :Gelli, Pembrokeshire
- :Gelli, Rhondda
- :Gelli Aur country park
- :Gelli Farmhouse, Llanvetherine
- :Gelli Felen Halt railway station
- :Gellimanwydd Chapel
- :Gemma Evans (footballer)
- :Gemma Frizelle
- :Gemma Rowland
- :Genealogies from Jesus College MS 20
- :General Register Office for England and Wales
- :Geoff Eales
- :Geoff Ellis
- :Geoff Holder
- :Geoffrey Dhenin
- :George Bull
- :George Cadogan Morgan
- :George Constantine (priest)
- :George Cording
- :George Edward Day
- :George Fisher (dramatist)
- :George Frederick Harding
- :George Gould Morgan
- :George Grant Francis
- :George Griffith (bishop)
- :George Hotel, Chepstow
- :George Howells
- :George Huntington (priest)
- :George Irby, 6th Baron Boston
- :George Jeffreys (pastor)
- :George Latham (footballer)
- :George Lockwood Morris
- :George Lort Phillips
- :George Nugent Tyrrell
- :George Owen Harry
- :George Prothero (cricketer)
- :George Reynolds (boxer)
- :George Shaw (cricketer, born 1931)
- :George Stradling
- :George Street Bridge, Newport
- :George Thomson (footballer, born 1854)
- :George Travers (rugby union)
- :George Tyler (Royal Navy officer)
- :Georgetown, Blaenau Gwent
- :Georgia Evans (rugby union)
- :Georgia Walters
- :Georgia Wilson (equestrian)
- :Geraint Goodwin
- :Geraint Griffiths
- :Geraint H. Jenkins
- :Geraint Howells
- :Geraint Jarman
- :Geraint Stanley Jones
- :Geraint Talfan Davies
- :Geraint Todd
- :Geraint son of Erbin
- :Geraint the Blue Bard
- :Gerald Jones
- :Gerald Williams (tennis commentator)
- :Gerald de Windsor
- :Gerallt Lloyd Owen
- :Gerard Cousins
- :Gerwyn Price
- :Geufron Hall, Llangollen
- :Gian Fulgoni
- :Giants (Welsh folklore)
- :Gilbern
- :Gilbert Basset
- :Gilbert Fitz Richard
- :Gilbert de Clare, 7th Earl of Gloucester
- :Gileston Manor
- :Gileston railway station
- :Gilfach Ddu
- :Gilfach Ddu railway station
- :Gilfach Goch
- :Gilfaethwy
- :Gillian Gill
- :Gilwern Halt railway station
- :Gilwern Hill, Monmouthshire
- :Ginger Jones
- :Gipsy Daniels
- :Gladstone's Library
- :Gladys Morgan
- :Glamorgan Archives
- :Glamorgan Building
- :Glamorgan County Silver Ball Trophy
- :Glamorgan Wanderers RFC
- :Glamorganshire (UK Parliament constituency)
- :Glamorganshire Golf Club
- :Glan-y-Mor Comprehensive School
- :Glan Conwy railway station
- :Glan Llyn
- :Glan y Llyn railway station
- :Glanamman (electoral ward)
- :Glandwr, Pembrokeshire
- :Glandyfi Castle
- :Glanrhyd Hospital
- :Glanusk Park
- :Glasbury
- :Glasbury (electoral ward)
- :Glascwm
- :Glaslyn Osprey Project
- :Glaslyn Rural District
- :Glastir
- :Glen Moody
- :Glen Usk, Llanhennock
- :Glendower House, Monmouth
- :Glewlwyd Gafaelfawr
- :Gloddfa Ganol
- :Glogue
- :Gloucester–Newport line
- :Glyder (electoral ward)
- :Glyder Fach
- :Glyderau
- :Glyn Ceiriog
- :Glyn Davidge
- :Glyn Garner
- :Glyn Houston
- :Glyn Simon
- :Glyn Valley Tramway
- :Glyncorrwg
- :Glyndyfrdwy
- :Glyndŵr Award
- :Glyndŵr House, Grosmont
- :Glynllifon
- :Glynllifon Street railway station
- :Gnoll Country Park
- :Godfrey Morgan, 1st Viscount Tredegar
- :Gofannon
- :Goginan
- :Gold Medal (National Eisteddfod of Wales)
- :Goldcliff
- :Goldcliff Priory
- :Golden Grove, Flintshire
- :Goldsland
- :Golf Halt railway station
- :Goodwick (electoral ward)
- :Gordon Back
- :Goreu fab Custennin
- :Goronwy Owen (poet)
- :Gorseddau Junction and Portmadoc Railway
- :Gorseddau Tramway
- :Gorseinon RFC
- :Gospel Pass
- :Governing Body of the Church in Wales
- :Govilon railway station
- :Gower Ornithological Society
- :Gower and Swansea Bay Coast Path
- :Gower dialect
- :Gowerton
- :Gowerton Comprehensive School
- :Gowerton railway station
- :Grace Dulais Davies
- :Grace Williams
- :Graeme Garrard
- :Graham Dixon-Lewis
- :Graham Price
- :Graham Williams (footballer, born 1938)
- :Graianrhyd
- :Graig-y-Rhacca
- :Graig Wood
- :Graigwen
- :Grand Hotel (Llandudno)
- :Grand Pavilion, Porthcawl
- :Grand Union (train operating company)
- :Grange Farmhouse farm buildings, Newcastle, Monmouthshire
- :Grannygate
- :Granston
- :Grant Llewellyn
- :Great Brynhill
- :Great Castle House
- :Great Cefnyberen
- :Great House, Llanarth
- :Great House, Llanover
- :Great House Farm, Llangua
- :Great Killough
- :Great Pool Hall, Llanvetherine
- :Great Porthamel Farm and Gatehouse
- :Great Tresenny Farmhouse
- :Great Western Cities
- :Great Western Mine
- :Greatest Hits Radio South Wales
- :Green Bridge of Wales
- :Green Gathering
- :Green Man Festival
- :Greenala Point
- :Greenfield, Flintshire
- :Greenlink
- :Greg Bowen
- :Greg Fitzgerald
- :Greg Hill (poet)
- :Greg Holmes (cricketer)
- :Gregynog Hall
- :Gresford
- :Grey Mare's Tail, Conwy
- :Griffith's Crossing railway station
- :Griffith Arthur Jones
- :Griffith Evans (bacteriologist)
- :Griffith Hartwell Jones
- :Griffith J. Griffith
- :Griffith Lloyd
- :Griffith Powell
- :Griffith W. Griffith
- :Griffithstown
- :Griffithstown Railway Museum
- :Groes-faen
- :Groeslon railway station
- :Groeswen Halt railway station
- :Gronw Pebr
- :Grosmont, Monmouthshire
- :Grosmont Town Hall
- :Grouted roof
- :Grove Building
- :Grove Farm House, Llanfoist
- :Gruffudd Fychan II
- :Gruffudd Vychan
- :Gruffudd ab Owain Glyndŵr
- :Gruffudd ap Llywelyn ap Iorwerth
- :Gruffydd Fychan ap Iorwerth
- :Gruffydd Maelor I
- :Gruffydd Young
- :Gruffydd ap Rhys ap Thomas
- :Grwyne Fawr
- :Guardian (sculpture)
- :Guest family
- :Guild of Our Lady of Ransom
- :Guildhall, Wrexham
- :Guilsfield
- :Gulf Refinery, Milford Haven
- :Gumfreston
- :Gunter Mansion
- :Gurnos
- :Guto Bebb
- :Guto Dafydd
- :Guto Nyth Brân
- :Gwaelod-y-Garth
- :Gwaenynog
- :Gwaith Powdwr
- :Gwalchmai, Anglesey
- :Gwalia United F.C.
- :Gwaun-Cae-Gurwen
- :Gwaunceste Hill
- :Gwawl
- :Gwawr Chapel
- :Gwen Crabb
- :Gwen ferch Ellis
- :Gwenan Davies
- :Gwendoline Davies
- :Gwendoline Trubshaw
- :Gwenfron Moss
- :Gwenllian Jenkins
- :Gwenllian Morgan
- :Gwenlyn Parry
- :Gwennan Harries
- :Gwenno Teifi
- :Gwenny Griffiths
- :Gwent Archives
- :Gwent Wildlife Trust
- :Gwenwynwyn
- :Gwerclas
- :Gwerful Fychan
- :Gwerful Mechain
- :Gwern
- :Gwernaffield
- :Gwernydd Penbre
- :Gwernydomen Halt railway station
- :Gwersyllt railway station
- :Gweunydd Glan-y-glasnant
- :Gwgon ap Meurig
- :Gwilliam Iwan Jones
- :Gwilym (band)
- :Gwilym Davies (minister)
- :Gwilym Edwards
- :Gwilym Gwent
- :Gwilym Tilsley
- :Gwilym ap Griffith
- :Gwlad
- :Gwlad y Gân
- :Gwladys
- :Gwladys Yvonne McKeon
- :Gwladys ferch Dafydd
- :Gwrfyw
- :Gwrhyr Gwalstawd Ieithoedd
- :Gwriad ap Elidyr
- :Gwrych Castle
- :Gwyddelwern
- :Gwyddno Garanhir
- :Gwydyr House
- :Gwyllion
- :Gwyn Jones (physicist)
- :Gwyn Jones (rugby union)
- :Gwyn Martin
- :Gwyn Morgan (civil servant)
- :Gwyn Thomas (novelist)
- :Gwyn ap Nudd
- :Gwyndaf Evans
- :Gwynfe
- :Gwynfryn, Wrexham
- :Gwynno
- :Gwyrfai Rural District
- :Gyrn Castle
- :H.M. Stanley Hospital
- :HMS Cambria (shore establishment)
- :HM Inspectorate of Probation
- :HM Prison Berwyn
- :HM Prison Cardiff
- :HM Prison Usk
- :Hadyn Ellis
- :Hafina Clwyd
- :Hafod
- :Hafod Copperworks
- :Hafod Elwy Moor National Nature Reserve
- :Hafod Uchtryd
- :Hafod y Llyn railway station
- :Hafodyrynys
- :Hafren Forest
- :Hakin
- :Hakin Docks railway station
- :Halfway railway station
- :Halghton
- :Halghton Hall
- :Halkyn
- :Halkyn Castle
- :Hall Street Methodist Church, Llanelli
- :Hammerfest (festival)
- :Hana Lili
- :Hanan Issa
- :Hanbury Arms
- :Hancorne family
- :Handel Greville
- :Hanef Bhamjee
- :Hanmer, Wrexham
- :Hannah Blore
- :Hannah Blythyn
- :Hannah Brier
- :Hannah Dingley
- :Hannah Grace
- :Hannah Jones (rugby union)
- :Hannah Stone
- :Hans Busk (1772–1862)
- :Harlech Tramway
- :Harleian genealogies
- :Harold Arthur Harris
- :Harold Thomas (rugby union, born 1883)
- :Harold Williams (priest, died 1954)
- :Haroldston St. Issell's
- :Haroldston West
- :Harpton Court
- :Harri Ackerman
- :Harri Pritchard-Jones
- :Harrison Keddie
- :Harry Adams (footballer)
- :Harry Davies (socialist)
- :Harry Greene (television personality)
- :Harry Holland (artist)
- :Harry Longueville Jones
- :Hasguard
- :Hate speech laws in the United Kingdom
- :Hatterrall Hill
- :Hatterrall Ridge
- :Haverfordwest Bank
- :Haverfordwest Castle (electoral ward)
- :Haverfordwest Priory (electoral ward)
- :Haverfordwest Rural District
- :Haverfordwest Town Museum
- :Haverfordwest transmitting station
- :Hawarden
- :Hawarden Castle (18th century)
- :Hawarden High School
- :Hawarden railway station
- :Hawise Lestrange
- :Hay-on-Wye Bridge
- :Hay Railway
- :Haydn Llewellyn Davies
- :Hayes Island Snack Bar
- :Hayscastle
- :Health and Care Research Wales
- :Heart North and Mid Wales
- :Heart South Wales
- :Heart Valley
- :Heath, Cardiff
- :Heath Low Level railway station
- :Heather and Ivan Morison
- :Hebron Chapel, Ton Pentre
- :Hebron railway station
- :Hedd Wyn (film)
- :Hefin O'Hare
- :Heinz Koppel
- :Heledd Fychan
- :Helen Jenkins
- :Helen Mackay (sculptor)
- :Helen Mary Jones
- :Helen Raynor
- :Helen Thomas (activist)
- :Helen Ward (footballer)
- :Helen Watts
- :Helig ap Glanawg
- :Hen-Dy-Cwrdd
- :Hen Domen
- :Hen Dyffryn Gwyn
- :Hen Gaer
- :Hen Gwrt Moated Site
- :Hen Llys
- :Henblas, Llanasa
- :Henblas Burial Chamber
- :Hendre'r-ywydd Uchaf Farmhouse
- :Hendre-Ddu Tramway
- :Hendrefoilan
- :Hengoed
- :Hengoed railway station
- :Hengwrt
- :Henllan
- :Henllan Amgoed
- :Henllan railway station
- :Henrhyd Falls
- :Henry's Moat
- :Henry Avray Tipping
- :Henry Clarence Whaite
- :Henry Davies (journalist)
- :Henry Edwards (priest)
- :Henry Frederick, Prince of Wales
- :Henry Haydn Jones
- :Henry Hicks (geologist)
- :Henry James (dean of Bangor)
- :Henry Jones-Davies (farmer)
- :Henry Jones (philosopher)
- :Henry Landor
- :Henry Lewis (academic)
- :Henry Morgan (bishop)
- :Henry Paget, 4th Marquess of Anglesey
- :Henry Parry (priest)
- :Henry Perry (writer)
- :Henry Rees
- :Henry Rowlands (bishop)
- :Henry Salisbury
- :Henry Somerset, 1st Marquess of Worcester
- :Henry Spinetti
- :Henry Tudor School
- :Henry Vivian, 1st Baron Swansea
- :Henry William John Edwards
- :Heol Senni Quarry
- :Heolyfelin Chapel
- :Herbert Millingchamp Vaughan
- :Herbert Price
- :Herbert family
- :Herbrandston
- :Heritage coast
- :Hermon, Pembrokeshire
- :Hermon Chapel, Penrhiwceiber
- :Hiag Akmakjian
- :Hidden (2018 TV series)
- :Hieracium radyrense
- :High Court enforcement officer
- :High Court judge (England and Wales)
- :High Glanau
- :High Hopes (British TV series)
- :High House, Penrhos, Monmouthshire
- :Higher Education Funding Council for Wales
- :Higher Kinnerton
- :Hightown, Wrexham
- :Hightown Barracks
- :Hijinx Theatre
- :Hill's Tramroad
- :Hill Mountain
- :Hirfynydd
- :Hirwaun railway station
- :History of Cardiff City F.C.
- :History of rugby union matches between Argentina and Wales
- :History of rugby union matches between Scotland and Wales
- :History of the Wales national rugby union team (2004–present)
- :Hodgeston
- :Hodgeston Parish Church
- :Hogia'r Wyddfa
- :Holiday on the Buses
- :Holy Cross Church, Port Talbot
- :Holy Trinity Church, Marcross
- :Holy Trinity Church, Sarn
- :Holyhead Breakwater
- :Holyhead Breakwater Lighthouse
- :Holyhead Lifeboat Station
- :Holyhead Mail Pier Lighthouse
- :Holyhead Maritime Museum
- :Holyhead Market Hall
- :Holyhead Mountain
- :Holyhead Mountain Hut Circles
- :Holyhead Town Council
- :Holyhead Town Hall
- :Holyhead transmitting station
- :Holywell, Flintshire
- :Holywell Community Hospital
- :Holywell Town Hall
- :Holywell branch line
- :Honno (publisher)
- :Honourable and Loyal Society of Antient Britons
- :Honours of the Principality of Wales
- :Hook, Pembrokeshire
- :Hoover's Sports Ground
- :Hope Hall
- :Hope railway station (Wales)
- :Hopkinstown
- :Horace Cumner
- :Horace Lyne
- :Horeb Chapel, Llwydcoed
- :Horizons Gorwelion
- :Horseman's Green
- :Horseshoe Falls (Wales)
- :Horsley Hall, Gresford
- :Horton and Port Eynon Lifeboat Station
- :Houghton, Pembrokeshire
- :Howard Collins
- :Howard Spring
- :Howard Stringer
- :Howard Thomas (producer)
- :Howel Gwyn
- :Howel Harris Hughes
- :Howell's House, Grosmont
- :Howell's School, Denbigh
- :Howell's School, Llandaff
- :Howell Davis
- :Howell Elvet Lewis
- :Howell Idris
- :Howell Jones Williams
- :Howells (department store)
- :Howick Farmhouse, Itton
- :Hu Gadarn
- :Hubberston
- :Hubert Rhys
- :Hueil mab Caw
- :Hugh Beaver Roberts
- :Hugh Davies (botanist)
- :Hugh Evans (politician)
- :Hugh Gore (bishop)
- :Hugh Hughes (poet)
- :Hugh Ingledew
- :Hugh John Vaughan Campbell, 6th Earl Cawdor
- :Hugh Johns
- :Hugh Lindsay (bishop)
- :Hugh Lloyd (bishop)
- :Hugh Maurice
- :Hugh Morriston Davies
- :Hugh Owen (educator)
- :Hugh Owen (minister)
- :Hugh Percy Wilkins
- :Hugh Roberts (politician)
- :Hugh Vaughan (Governor of Jersey)
- :Hugh Vincent
- :Hugh Williams (historian)
- :Hughes Memorial, Corris
- :Humphrey Lloyd (bishop)
- :Humphrey Mackworth
- :Humphrey Owen Jones
- :Hundleton
- :Huw Morus
- :Huw Owen
- :Huw Richards
- :Huw Thomas (Welsh politician)
- :Huw Williams
- :Huwal of the West Welsh
- :Hwb
- :Hwyl Nofio
- :Hyam's Mineral Water Works
- :Hygga House Dovecote, Trellech
- :Hymns to the Stone
- :Hywel Bennett
- :Hywel Gwynfryn
- :Hywel Sele
- :Hywel Williams
- :Hywel ap Ieuaf
- :Hywel the Great
- :ITV Cymru Wales
- :Iago ap Beli
- :Iain Rogerson
- :Ian Buckett
- :Ian Hillier
- :Ian Johnston (police commissioner)
- :Ian Parrott
- :Ian Skidmore
- :Ian Watson (rugby league)
- :Ianto Davies
- :Ida de Grey
- :Idris Cox
- :Idris Davies
- :Idris Foster
- :Idris Gawr
- :Idris Hopkins
- :Idris Lewis
- :Idwal Foel
- :Idwal Iwrch
- :Iestyn George
- :Ieuan Morris
- :Ieuan Rees
- :Ieuan ap Hywel Swrdwal
- :Ieuan ap Rhydderch ab Ieuan Llwyd
- :Ifor Bach
- :Ifor Owen
- :Ike Fowler
- :Illtyd (electoral ward)
- :Ilston
- :Ilston Book
- :Imogen Thomas
- :In Parenthesis
- :Inabwy
- :Independent Nation: Should Wales Leave the UK?
- :Infantry Battle School
- :Infrastructure Planning Commission
- :Ingimundr (tenth century)
- :Inglis Bridge, Monmouth
- :Inmos microprocessor factory
- :Institute of Art and Ideas
- :Institute of Biological, Environmental and Rural Sciences
- :Institute of Chartered Accountants in England and Wales
- :Interim Morgan administration
- :Internal Fire Museum of Power
- :International Convention Centre Wales
- :International Film Festival of Wales
- :International Open Series
- :Ioan Bowen Rees
- :Iolo Goch
- :Iolo Williams
- :Iorrie Isaacs
- :Iorwerth Goch ap Maredudd
- :Iorwerth Peate
- :Iris Gower
- :Iris Williams
- :Irma Chilton
- :Irreligion in Wales
- :Isaac Christie-Davies
- :Isaac Davis (advisor)
- :Isaac Foulkes
- :Isaac Jones (priest)
- :Isabella Gifford
- :Iscoed
- :Iscoyd Park
- :Island House, Laugharne
- :Isle of Anglesey electoral boundary changes 2012
- :Islwyn Borough Transport
- :Isycoed
- :Itton
- :Itton Court
- :Ivor Barry
- :Ivor Davies (rugby union, born 1892)
- :Ivor Gregory
- :Ivor Guest, 1st Baron Wimborne
- :Ivor Roberts-Jones
- :Iwan Bala
- :J. Dunn & Co., Tenby
- :J. G. Parry-Thomas
- :J. Glyn Davies
- :J. Gwyn Griffiths
- :J. S. Pughe
- :J. Vyrnwy Morgan
- :J W Poundley and D Walker
- :Jack Harris (singer-songwriter)
- :Jack Hurrell
- :Jack Jones (rugby union, born 1886)
- :Jack Marshman
- :Jack Mary Ann
- :Jack Perrett
- :Jack Petersen (boxer)
- :Jack Sargeant (politician)
- :Jack Shore
- :Jack Sound
- :Jack Williams (rugby union)
- :Jack o' Kent
- :Jack to a King
- :Jackie Jones
- :Jacob Youde William Lloyd
- :Jak Jones
- :Jake Charles
- :Jake Taylor (footballer, born 1991)
- :Jakokoyak
- :Jamal Easter
- :James Ashwell
- :James Bevan
- :James Conway Davies
- :James Davis (satirist)
- :James Edmund Vincent
- :James Eirian Davies
- :James Fynn
- :James Goronwy Mathias
- :James Harrison (British Army officer)
- :James Howell
- :James Loveridge
- :James Madison Carpenter
- :James Perrot
- :James Philipps
- :James Price (of Monachty)
- :James Roberts (British athlete)
- :James Stephens (trade unionist)
- :James Waite (footballer, born 1999)
- :James Whitley (archaeologist)
- :James Williams (priest, died 1872)
- :Jameston
- :Jamie Lucas
- :Jamie Reed (footballer)
- :Jamie Wallis
- :Jane Aaron (educator)
- :Jane Brereton
- :Jane Cave
- :Jane Helen Rowlands
- :Jane Hughes (poet)
- :Jane Williams (Ysgafell)
- :Janet Haworth
- :Janet Henderson
- :Janet Price
- :Jasmine Joyce-Butchers
- :Jason Brown (footballer)
- :Jason Cook (boxer)
- :Jason Mohammad
- :Jason Rees
- :Jay Simon
- :Jayne Bryant
- :Jayne Ludlow
- :Jazmin Carlin
- :Jean-François Le Gonidec
- :Jeffrey Cuthbert
- :Jeffrey Weeks (sociologist)
- :Jeffreyston
- :Jehdeiah Bowen
- :Jehoida Hodges
- :Jemima Phillips
- :Jemma Lowe
- :Jennie Eirian Davies
- :Jennifer Sullivan (writer)
- :Jenny James (swimmer)
- :Jenny McLoughlin
- :Jenny Ogwen
- :Jenny Randerson, Baroness Randerson
- :Jenny Willott
- :Jeremiah Azu
- :Jeremy Huw Williams
- :Jerry Hunter
- :Jerry the Tyke
- :Jerusalem Chapel, Bethesda
- :Jerusalem Chapel, Penrhiwceiber
- :Jerusalem Chapel, Ynysybwl
- :Jess Taylor-Roberts
- :Jessica Garlick
- :Jessica Roberts
- :Jessie Ace and Margaret Wright
- :Jillian Lane
- :Jim Burns
- :Jim Lang (rugby union)
- :Jim Pressdee
- :Jimmy Austin
- :Jimmy Jewell (climber)
- :Jo Price
- :Jo Stevens
- :Joan Williams (artist)
- :Joanna Gruesome
- :Jocelyn Burton
- :Joe Cordina
- :Joe Dunthorne
- :Joe Erskine (Welsh boxer)
- :Joe Johns (boxer)
- :Joe Low
- :Joe Westwood
- :Joel Colwill
- :Joel Makin
- :Joey Jones
- :John Ballinger (librarian)
- :John Barnie
- :John Bassett (died 1551)
- :John Beard (artist)
- :John Beddoes School
- :John Bevan (rugby union)
- :John Bryan Evans
- :John Bryn Edwards
- :John Callis (pirate)
- :John Campbell, 1st Earl Cawdor
- :John Campbell, 2nd Earl Cawdor
- :John Campbell of Cawdor
- :John Cledwyn Davies
- :John Collins (footballer, born 1949)
- :John David (musician)
- :John David Davies
- :John David Jenkins
- :John Davidson (cricketer, born 1964)
- :John Davies (Congregationalist minister, born 1804)
- :John Davies (Mallwyd)
- :John Davies (Unitarian minister, born 1795)
- :John Davies (bard)
- :John Davies (bibliographer and genealogist)
- :John Davies (priest, born 1795)
- :John Davies (translator)
- :John Davies of Nercwys
- :John Derrick (cricketer)
- :John Dyer
- :John Dyfnallt Owen
- :John Edward Daniel
- :John Edward Jones (governor)
- :John Edwards (Siôn Treredyn)
- :John Edwards (hymnist)
- :John Eldon Bankes
- :John Ellis (religious writer)
- :John Ellis Williams
- :John Evans (1702–1782)
- :John Evans (pirate)
- :John Evans (surgeon)
- :John Evans (topographical writer)
- :John Fitzalan (died 1240)
- :John Frost School
- :John Frost Square
- :John Gibson (editor and journalist)
- :John Gibson (sculptor)
- :John Glynne (judge)
- :John Griffith (journalist)
- :John Griffiths (Welsh politician)
- :John Griffiths (curator)
- :John Griffiths (mathematician)
- :John Gwenogvryn Evans
- :John Hanmer (bishop)
- :John Hardy (composer)
- :John Henry Evans
- :John Henry Salter
- :John Henry Vivian
- :John Herbert (Secretary of State)
- :John Hugh Jones
- :John Hughes (1873–1932)
- :John Hughes (antiquary)
- :John Hughes (businessman)
- :John Hughes (minister, 1796–1860)
- :John Hughes (priest, 1787–1860)
- :John Iltyd Nicholl
- :John Islan Jones
- :John Jeffery (rugby union)
- :John Jenkins (Ifor Ceri)
- :John Jenkins (Welsh politician)
- :John Jenkinson (bishop)
- :John Jones (16th-century physician)
- :John Jones (Benedictine)
- :John Jones (Coch Bach y Bala)
- :John Jones (Jac Glan-y-gors)
- :John Jones (archdeacon of Merioneth)
- :John Jones (footballer, born 1856)
- :John Jones (literary patron)
- :John Jones (physician, died 1709)
- :John Lansdown
- :John Laviers Wheatley
- :John Lewis (Radnor MP)
- :John Lewis (of Abernant)
- :John Lloyd-Jones
- :John Lloyd (Cardiganshire)
- :John Lloyd (judge)
- :John Lloyd (rector of Caerwys)
- :John Lloyd Davies
- :John Lloyd Thomas
- :John Lysaght and Co.
- :John Marek
- :John McGrath (artistic director)
- :John Morgan (poet)
- :John Morgan Lloyd
- :John Morris-Jones
- :John Nicholls (controversialist)
- :John Owen (Owain Alaw)
- :John Owen (bishop of St Asaph)
- :John Owen (chancellor of Bangor)
- :John Owen (epigrammatist)
- :John Parry (Mormon)
- :John Parry (harpist)
- :John Penry
- :John Pettingall
- :John Petts (artist)
- :John Powell (judge)
- :John Price (footballer, born 1854)
- :John Price (librarian)
- :John Price Davies
- :John Prise
- :John Pugh (of Mathafarn)
- :John Rawlins (rugby union)
- :John Rea (footballer)
- :John Rice Jones
- :John Roberts, 1st Baron Clwyd
- :John Roberts (Presbyterian)
- :John Roberts (footballer, born 1946)
- :John Roberts (missionary)
- :John Roland Phillips
- :John Romilly Allen
- :John Rowlands (Giraldus)
- :John Scourfield
- :John Stevens (Wisconsin inventor)
- :John Stone (curler)
- :John Strand-Jones
- :John T. Koch
- :John T. Lewis
- :John Treasure
- :John Vaughan, 1st Earl of Carbery
- :John Vaughan, 1st Viscount Lisburne
- :John Vaughan (chief justice)
- :John Vivian, 4th Baron Swansea
- :John Vivian (1750–1826)
- :John W. Thomas (Wisconsin politician)
- :John Whitlock Nicholl Carne
- :John William Duncan
- :John William Evans (Welsh politician)
- :John Williams (barrister)
- :John Williams (minister and physician)
- :John Wogan (MP died 1557)
- :John Wogan (MP died 1580)
- :John Woodcock (police officer)
- :John Wynne (bishop)
- :John Wynne (industrialist)
- :John ac Alun
- :John of Thoresby
- :Johnnie Morgan
- :Johnny Houlston
- :Johnny Morris (television presenter)
- :Johnstown and Hafod railway station
- :Joint Service Mountain Training Centre
- :Jon Worth
- :Jonah Jones (sculptor)
- :Jonathan Adams (architect)
- :Jonathan Brown (Welsh footballer)
- :Jonathan Davies (cricketer, born 1980)
- :Jonathan Edwards (Welsh politician)
- :Jonathan Edwards (poet)
- :Jonathan Edwards (priest)
- :Jonathan Phillips (ice hockey)
- :Jonathan Shipley
- :Jones' Village Bakery
- :Jones of Hendwr
- :Jonny Williams
- :Jordan Davies (footballer)
- :Jordanston Halt railway station
- :Joseph Bradney
- :Joseph Davies (priest)
- :Joseph Parry's Cottage
- :Josh Adams (rugby union)
- :Josh Hathaway
- :Josh Helps
- :Josh Wardle
- :Joshua Jones (TV series)
- :Joshua Parry
- :Joshua Thomas
- :Josiah D. Hicks
- :Josiah Rees
- :Jude Rogers
- :Judgement Day (rugby union)
- :Judges' Lodgings, Monmouth
- :Julian Cayo-Evans
- :Julie Morgan
- :July 2024 Welsh Labour leadership election
- :Junior Tour of Wales
- :Justiciar of South Wales
- :Kai Owen
- :Kale (Welsh Roma)
- :Kamal Ali
- :Kara Chesworth
- :Karen Davies
- :Karen Holford
- :Karl Jones
- :Kate McGill
- :Katherine Grant, 12th Countess of Dysart
- :Kathleen Lloyd Jones
- :Katie Prankerd
- :Katrina Jacks
- :Kay Morley-Brown
- :Kayleigh Powell
- :Kayne McLaggon
- :Keeping Faith (TV series)
- :Keira Bevan
- :Keith Best
- :Keith Bradshaw (rugby union)
- :Keith Kissack
- :Keith Lloyd
- :Keith Robbins
- :Kelly Lee Owens
- :Kelly Morgan
- :Kelsey Jones (rugby union)
- :Kelvin Smart
- :Kemeys Commander
- :Kemeys Manor
- :Ken Leek
- :Kendrick's Cave
- :Kendrick's Cave Decorated Horse Jaw
- :Kenfig
- :Kenfig Castle
- :Kenfig Hill
- :Kenfig Pool
- :Kennixton Farmhouse
- :Kenyon Jones
- :Kerry, Powys
- :Kerry Hill sheep
- :Kerry Morgan
- :Kerry Peers
- :Kevin Lloyd (footballer, born 1970)
- :Kevin Moseley
- :Kevin Sheedy (Irish footballer)
- :Kiban Rai
- :Kidwell-e Festival
- :Kidwelly Priory
- :Kidwelly Town Council
- :Kidwelly Town Hall
- :Kidwelly sex cult
- :Kieran Evans
- :Kieron Davies
- :Kieron Evans
- :Kieron Freeman
- :Kilgetty
- :Kilgetty/Begelly
- :Kilgwrrwg
- :Killay, Swansea
- :Killing of Ruth Williams
- :Kilsby Jones
- :Kilvey Community Woodland
- :Kilvey Hill
- :Kilvey Hill transmitting station
- :Kim Howells
- :Kimberley Nixon
- :King's Quoit
- :King Camber
- :King Henry VIII Grammar School
- :King Square, Barry
- :Kingsbridge, Swansea
- :Kington and Eardisley Railway
- :Kinmel Hall
- :Kinmel Park Training Area
- :Kinmel Park mutiny
- :Kirsty Williams
- :Kittle, Swansea
- :Knighton Community Centre
- :Knighton Hospital
- :Knights of the Royal Oak
- :Knucklas
- :Knucklas railway station
- :Kusha Petts
- :Kyle Letheren
- :Kyron Duke
- :LC, Swansea
- :LV 91
- :Labour for an Independent Wales
- :Lady Park Wood National Nature Reserve
- :Lake Vyrnwy Half Marathon
- :Lambrocus Thomas
- :Lampeter Castle
- :Lampeter Town Hall
- :Lampeter Town RFC
- :Lampeter Velfrey
- :Lampeter railway station
- :Lamphey
- :Lamphey Bishop's Palace
- :Land Authority for Wales
- :Land Transaction Tax
- :Land use in Wales
- :Landfill Disposals Tax
- :Landimore
- :Landore
- :Landore High Level railway station
- :Landore Viaduct
- :Langland Bay Golf Club
- :Languages of Wales
- :Lansbury Park
- :Lansdowne Primary School
- :Larkfield (electoral ward)
- :Lateysha Grace
- :Latin Mass Society of England and Wales
- :Laugharne Town Hall
- :Laugharne Township (electoral ward)
- :Laura Deas
- :Laura Evans-Williams
- :Laura Halford
- :Laura O'Sullivan
- :Lauren Harries
- :Lauren Parfitt
- :Lauren Price
- :Laurence Womock
- :Lavan Sands
- :Lavernock Battery
- :Lavernock railway station
- :Law Society of England and Wales
- :Lawrenny
- :Le Pub
- :Learned Society of Wales
- :Leckwith development
- :Lee Nogan
- :Lee Selby
- :Lee Thomas (rugby union)
- :Leekes
- :Legal Services Complaints Commissioner
- :Legal Services Ombudsman
- :Legislative consent motion
- :Leighton Samuel
- :Len Newcombe
- :Leo Newton
- :Leon Atkin
- :Leon Pownall
- :Leonora Brito
- :Leslie Bonnet
- :Leslie Jones (footballer)
- :Leslie Morris
- :Leslie Thomas
- :Letterston
- :Levy-Dew
- :Lewis Gilbertson
- :Lewis Jones (writer)
- :Lewis Morris (1701–1765)
- :Lewis ab Owen
- :Lewys Glyn Cothi
- :Lexcel
- :Leyland Arms, Llanelidan
- :Liam Cullen
- :Liam Hutchinson
- :Liam Williams (rugby union)
- :Libanus Chapel, Aberaman
- :Lichfield Gospels
- :Liddeston
- :Lidmore
- :Life Sciences Hub Wales
- :Life imprisonment in England and Wales
- :Lightship 2000
- :Lillian Griffith
- :Limekilns at Kiln Park, Pembrokeshire
- :Limeslade Mystery
- :Limpert Bay
- :Linda Parker (bowls)
- :Linda Vista Gardens
- :Lisa Diveney
- :Lisa Gwilym
- :Lisa Lee Dark
- :Lisa Neumann
- :Lisa Power
- :List of Fairbourne Railway rolling stock
- :List of Llangollen Railway rolling stock
- :List of stations and halts on the Vale of Rheidol Railway
- :Litchard
- :Little Haven
- :Little Llwygy Farmhouse, Cwmyoy
- :Little Newcastle
- :Little Orme
- :Little Pitt Cottage
- :Little and Broad Haven Lifeboat Station
- :Live at Treorchy
- :Livox Wood
- :Liz Johnson (swimmer)
- :Llais Gwynedd
- :Llan-ar-goll-en
- :Llan-dafel
- :Llan Ffestiniog
- :Llanafan Fawr
- :Llanarmon-yn-Iâl
- :Llanarmon Dyffryn Ceiriog
- :Llanarmon Mynydd Mawr
- :Llanbadarn Fawr, Ceredigion
- :Llanbadarn Fawr, Powys
- :Llanbadarn Fawr Community Council
- :Llanbedr
- :Llanbedr-y-Cennin
- :Llanbedr Dyffryn Clwyd
- :Llanbedrog
- :Llanberis Lake Railway
- :Llanberis railway station (Llanberis Lake Railway)
- :Llanberis railway station (Snowdon Mountain Railway)
- :Llanbethery Platform railway station
- :Llanbister
- :Llanboidy
- :Llanbradach
- :Llanbrynmair
- :Llancaiach railway station
- :Llancarfan
- :Llandaff Rowing Club
- :Llandarcy
- :Llanddaniel Fab
- :Llandderfel railway station
- :Llanddewi Court
- :Llanddewi Velfrey
- :Llanddoged and Maenan
- :Llanddona fish weir
- :Llanddulas and Rhyd-y-foel
- :Llanddyfnan
- :Llandegfan
- :Llandegfedd Reservoir
- :Llandegla
- :Llandegley International Airport
- :Llandeilo (electoral ward)
- :Llandeilo Bridge
- :Llandeilo Llwydarth
- :Llandeloy
- :Llandinam
- :Llandinam Bridge
- :Llandingat House
- :Llandogo
- :Llandough Castle
- :Llandough Platform railway station
- :Llandovery Bank
- :Llandovery Castle
- :Llandovery Hospital
- :Llandovery RFC
- :Llandovery Town Hall
- :Llandow
- :Llandow (Wick Road) Halt railway station
- :Llandow (electoral ward)
- :Llandow Halt railway station
- :Llandre
- :Llandrillo, Denbighshire
- :Llandrillo yn Rhos
- :Llandrindod East/West
- :Llandrindod Wells County War Memorial Hospital
- :Llandrindod Wells Deanery
- :Llandrindod Wells Library
- :Llandrindod Wells transmitting station
- :Llandrindod railway station
- :Llandrinio Bridge
- :Llandudno Cable Car
- :Llandudno F.C.
- :Llandudno General Hospital
- :Llandudno Junction railway station
- :Llandudno Ladies F.C.
- :Llandudno Lifeboat Station
- :Llandudno Open
- :Llandudno Town Hall
- :Llandudno and Colwyn Bay Electric Railway
- :Llandudno railway station
- :Llandyfriog transmitting station
- :Llandyrnog
- :Llanedeyrn High School
- :Llanegryn
- :Llanelieu
- :Llanelli (Senedd constituency)
- :Llanelli (UK Parliament constituency)
- :Llanelli Star
- :Llanelli Town Hall
- :Llanelli and Mynydd Mawr Railway
- :Llanelli railway station
- :Llanelli transmitting station
- :Llanelly Bank
- :Llanelly Tramways
- :Llanerch-Ayron Halt railway station
- :Llanerchrugog F.C.
- :Llanerchydol
- :Llanfachraeth
- :Llanfaelog
- :Llanfaes
- :Llanfaethlu
- :Llanfaglan
- :Llanfair-Nant-Gwyn
- :Llanfair Dyffryn Clwyd
- :Llanfair Grange
- :Llanfawr Quarries
- :Llanfechain
- :Llanfechan
- :Llanfechell
- :Llanferres
- :Llanfihangel-ar-Arth
- :Llanfihangel-yng-Ngwynfa
- :Llanfihangel (Powys electoral ward)
- :Llanfihangel Penbedw
- :Llanfihangel Talyllyn
- :Llanfihangel y Creuddyn
- :Llanfoist
- :Llanfynydd
- :Llanfynydd, Flintshire
- :Llanfyrnach
- :Llanfyrnach Rural District
- :Llangadwaladr, Powys
- :Llangaffo
- :Llangattock, Powys
- :Llangattock-Vibon-Avel
- :Llangattock Court
- :Llangedwyn
- :Llangefni Town F.C.
- :Llangefni railway station
- :Llangennech derailment
- :Llangennech railway station
- :Llangenny
- :Llangernyw
- :Llangernyw Yew
- :Llangoed Hall
- :Llangollen Bridge
- :Llangollen Canal Museum
- :Llangollen Community Hospital
- :Llangollen Town Hall
- :Llangrannog
- :Llangurig
- :Llangurig branch
- :Llangurig railway station
- :Llangwm, Conwy
- :Llangwm, Monmouthshire
- :Llangwm, Pembrokeshire
- :Llangwyryfon
- :Llangybi, Monmouthshire
- :Llangyfelach
- :Llangyndeyrn
- :Llangynidr Bridge
- :Llangynog
- :Llangynwyd
- :Llangynwyd Castle
- :Llanharan
- :Llanharan House
- :Llanharan RFC
- :Llanharan railway station
- :Llanhilleth
- :Llanhilleth RFC
- :Llanidan
- :Llanidloes Town Hall
- :Llanidloes War Memorial Hospital
- :Llanidloes transmitting station
- :Llanigon
- :Llanilar railway station
- :Llanishen, Monmouthshire
- :Llanishen Golf Club
- :Llanishen High School
- :Llanllwchaiarn
- :Llanmaes
- :Llanmartin
- :Llanmerewig
- :Llanmihangel Place
- :Llannerch-y-medd
- :Llannerch Hall
- :Llanon
- :Llanpumpsaint railway station
- :Llanpumsaint
- :Llanrhaeadr-ym-Mochnant
- :Llanrhian
- :Llanrhos
- :Llanrhydd
- :Llanrhystyd Road railway station
- :Llanrug
- :Llanrumney Hall
- :Llansaint
- :Llansamlet
- :Llansamlet (electoral ward)
- :Llansamlet railway station
- :Llansannor Court
- :Llansantffraed
- :Llansantffraed, Monmouthshire
- :Llansawel transmitting station
- :Llansilin
- :Llanstadwell
- :Llanstephan, Powys
- :Llanstinan
- :Llantarnam Abbey
- :Llantarnam Grange Arts Centre
- :Llantarnam railway station
- :Llanteg
- :Llanthony
- :Llanthony Priory
- :Llantood
- :Llantrisant Castle
- :Llantrisant Guildhall
- :Llantrisant–Aberthaw line
- :Llantwit Fardre
- :Llantwit Major (electoral ward)
- :Llantwit Major Roman Villa
- :Llantwit Major Town Hall
- :Llantwit Major railway station
- :Llantysilio Hall
- :Llanuwchllyn
- :Llanvaches
- :Llanvair Discoed
- :Llanvapley
- :Llanvihangel Crucorney
- :Llanwddyn (electoral ward)
- :Llanwenarth Baptist Chapel
- :Llanwenarth House
- :Llanwenarth Ultra
- :Llanwenog sheep
- :Llanwern (electoral ward)
- :Llanwnda, Pembrokeshire
- :Llanwrthwl
- :Llanwrtyd Wells transmitting station
- :Llanybri
- :Llanychaer
- :Llanymynech
- :Llanyre
- :Llawhaden
- :Llawhaden Bridge
- :Llawhaden Castle
- :Llay
- :Llech Ronw
- :Llechryd
- :Llechwedd Slate Caverns
- :Llechwedd quarry
- :Lledr Valley
- :Llef o'r Nant
- :Lleision ap Thomas
- :Llety'r Dryw
- :Llew Edwards
- :Llew Smith
- :Llewellyn Lloyd
- :Llewellyn baronets
- :Llewelyn, Saskatchewan
- :Llewelyn Lloyd (naturalist)
- :Lleweni Hall
- :Lliedi (electoral ward)
- :Lliswerry
- :Lliswerry A.F.C.
- :Lliw Valley
- :Llowes
- :Lloyd George Museum
- :Lloyd George Society
- :Lloyd Jones (figure skater)
- :Lloyd Street Chapel, Llanelli
- :Lloyd Woolf
- :Lludd Llaw Eraint
- :Lluest-wen Reservoir
- :Lluesty Hospital
- :Llugwy Hall
- :Llwydcoed
- :Llwydcoed (electoral ward)
- :Llwyn-celyn Farmhouse
- :Llwyn-y-gaer House, Tregare
- :Llwyn Bryn-Dinas
- :Llwyn Isaf
- :Llwyncelyn, Ceredigion
- :Llwyneinion
- :Llwyngwern quarry
- :Llwyngwril
- :Llwynypia
- :Llwynypia Hospital
- :Llwynywermod
- :Llygadwy
- :Llyn-y-Foel
- :Llyn Alaw
- :Llyn Bedydd
- :Llyn Bodgylched
- :Llyn Bodgynydd
- :Llyn Cefni
- :Llyn Conwy
- :Llyn Cwellyn
- :Llyn Cwm-y-ffynnon
- :Llyn Dinas
- :Llyn Dulyn
- :Llyn Eigiau
- :Llyn Elsi
- :Llyn Fanod
- :Llyn Geirionydd
- :Llyn Goddionduon
- :Llyn Idwal
- :Llyn Llech Owain
- :Llyn Llywenan
- :Llyn Mair
- :Llyn Melynllyn
- :Llyn Padarn
- :Llyn Peris
- :Llyn y Fan Fawr
- :Llynnau Mymbyr
- :Llynvi and Ogmore Railway
- :Llys Euryn
- :Llys Helig
- :Llys Rhosyr
- :Llysdinam
- :Llysfaen
- :Llysfaen railway station
- :Llysfasi College
- :Llywelyn Bren
- :Llŷr
- :Llŷr Ifans
- :Local Government (Religious etc. Observances) Act 2015
- :Local Government Association
- :Local Government Commission for Wales
- :Local board of health
- :Locws international
- :Loggerheads Country Park
- :Login, Carmarthenshire
- :London School of Commerce
- :London Welsh School
- :Lone Drøscher Nielsen
- :Lone Star (band)
- :Long Mountain transmitting station
- :Lonza Bowdler
- :Lord Chief Justice of England and Wales
- :Los Angeles St. David's Day Festival
- :Loughor Viaduct
- :Loughor railway station
- :Louie Myfanwy Thomas
- :Louis Barnett Abrahams
- :Louise Elliott
- :Love Jones-Parry (British Army officer)
- :Lower Celliau, Llangattock Lingoed
- :Lower Dyffryn House, Grosmont
- :Lower Hael Wood
- :Lower House Stream Section
- :Lower Penarth railway station
- :Lower Swansea valley
- :Lower Tresenny Barn
- :Lowri Gwilym
- :Lowri Morgan
- :Lucas de la Rua
- :Lucy Walter
- :Luke Jephcott
- :Luke Mariette
- :Luke Thomas (chef)
- :Lydart
- :Lydstep Haven
- :Lydstep Palace
- :Lyn Davies
- :Lyn Harding
- :Lyndon Jones
- :Lyndon Williams
- :Lynn Bowles
- :Lynn Davies
- :Lynn Ungoed-Thomas
- :MOMA, Wales
- :MVM Entertainment
- :Mab Jones
- :Mabon ap Modron
- :Machen
- :Machen House
- :Machen railway station
- :Machynlleth Festival
- :Machynlleth railway station
- :Machynlleth transmitting station
- :Machynys
- :Machynys Ponds
- :Mackenzie Martin
- :Madog Crypl
- :Madog Elfed
- :Madog ap Gruffydd Maelor
- :Madog ap Maredudd
- :Madoline Thomas
- :Madron (saint)
- :Maelgwn ap Rhys
- :Maelgwn ap Rhys (rebel)
- :Maelienydd
- :Maelor
- :Maelor Gawr
- :Maelor Saesneg
- :Maelor Way
- :Maen Achwyfan
- :Maenan
- :Maenclochog
- :Maenclochog (electoral ward)
- :Maenofferen quarry
- :Maentwrog
- :Maerdy
- :Maerdy Farmhouse, Llanvihangel-Ystern-Llewern
- :Maerdy railway station
- :Maes (eisteddfod)
- :Maes Manor
- :Maesgeirchen
- :Maesglas
- :Maesglase
- :Maeshafn
- :Maeshyfryd, Anglesey
- :Maesmawr Hall
- :Maesteg (Ewenny Road) railway station
- :Maesteg Community Hospital
- :Maesteg House
- :Maesteg Town Hall
- :Maesteg railway station
- :Maesycwmmer
- :Maesycwmmer railway station
- :Magenta (Welsh band)
- :Maggie Jones, Baroness Jones of Whitchurch
- :Magi Dodd
- :Magor, Monmouthshire
- :Magor Marsh
- :Magor and St Mellons Rural District
- :Mags Harries and Lajos Héder
- :Mahmood Hussein Mattan
- :Maiden Wells
- :Main Arts Building, Bangor University
- :Maindiff Court Hospital
- :Maindy Barracks
- :Maindy Centre
- :Mair Garside
- :Malator
- :Malcolm Bishop
- :Malcolm Nash
- :Malcolm Uphill
- :Malcolm Vaughan
- :Malltraeth
- :Mallwyd
- :Malpas, Newport
- :Manaw Gododdin
- :Manawydan
- :Manawydan fab Llŷr
- :Manon Steffan Ros
- :Manor Farmhouse, Crick
- :Manor Farmhouse and Manor Cottage, Portskewett
- :Manorbier
- :Manorbier Castle
- :Manorbier Dovecote
- :Manorbier Newton
- :Manordeifi
- :Manordeifi Old Church
- :Manorhaus, Ruthin
- :Manorowen
- :Mansion House, Cardiff
- :Mansion House, Newport
- :Mansion House, Swansea
- :Manufacturing Engineering Centre
- :Marc Phillips
- :Marc Rhys
- :Marc Treanor
- :Marcher Radio Group
- :Marchwiel
- :Marcross
- :Mared Williams
- :Maredudd ab Ieuan ap Robert
- :Maredudd ab Owain
- :Maredudd ap Rhys Gryg
- :Maredudd ap Tudur
- :Marford
- :Margam Abbey
- :Margam Knuckle Yard
- :Margaret Davies
- :Margaret Davies (writer)
- :Margaret Gordon (singer)
- :Margaret Grey
- :Margaret Hanmer
- :Margaret John
- :Margaret Jones (writer)
- :Margaret Lloyd (Moravian)
- :Margaret Phillips (actress)
- :Margaret Pritchard
- :Margaret Townsend Jenkins
- :Marguerite Florence Laura Jarvis
- :Mari Griffith
- :Mari Strachan
- :Maria Riddell
- :Mariamne Johnes
- :Marie Novello
- :Marine Character Area
- :Marine and Fisheries Division (Wales)
- :Marion Eames
- :Maritime Quarter
- :Mark Davies (cricketer, born 1969)
- :Mark Mouland
- :Mark O'Leary (cricket coach)
- :Mark Pilkington (golfer)
- :Mark Sampson
- :Mark Serwotka
- :Mark Tami
- :Mark Williams (politician)
- :Market Arcade, Newport
- :Markham, Caerphilly
- :Marl (Conwy electoral ward)
- :Marloes
- :Marloes Sands
- :Marloes and St Brides
- :Marmaduke Middleton
- :Marriage (Wales) Act 2010
- :Marros Sands
- :Marshes Turnpike Gate railway station
- :Marshfield, Newport
- :Marshfield railway station
- :Marteine Lloyd
- :Martha Llwyd
- :Martin Caton
- :Martin Moore-Bick
- :Martin Rossiter
- :Martletwy
- :Martyn Williams
- :Marvin Thompson
- :Marwnad yr Ehedydd
- :Mary Anne Edmunds
- :Mary Balogh
- :Mary Davies (lawn bowler)
- :Mary Dendy
- :Mary Drelincourt
- :Mary Edith Nepean
- :Mary Glynne
- :Mary Jane Evans
- :Mary Jane Innes
- :Mary Jestyn Jeffreys
- :Mary Lloyd (sculptor)
- :Mary Lloyd Jones
- :Mary Myfanwy Wood
- :Mary Oliver Jones
- :Mary Penry
- :Mason Jones (fighter)
- :Mason Ryan
- :Mass spectrometry at Swansea
- :Massey Sisters
- :Math fab Mathonwy
- :Mathafarn
- :Mathern
- :Mathern Mill
- :Mathew Owens
- :Mathias Maurice
- :Mathias baronets
- :Matholwch
- :Mathry
- :Mathry Road Halt railway station
- :Matt Bush (taekwondo)
- :Matt Jukes
- :Matt Ryan (actor)
- :Matt Whatley (footballer)
- :Matthew Maynard
- :Matthew Rees (footballer)
- :Matthew Smith (footballer, born 1999)
- :Matthew W. Davies
- :Matthew Watkins
- :Maurice FitzGerald, Lord of Llanstephan
- :Maurice Jones (priest)
- :Maurice O'Sullivan (boxer)
- :Maurice Parry
- :Mawddwy
- :Mawddwy Railway
- :Mawgan
- :Mayals
- :Mayor of Newport
- :Mayor of Wrexham
- :Mayzee Davies
- :McNally v R
- :Meat Promotion Wales
- :Media Wales
- :Medwyn Williams
- :Meees
- :Megan Davies (rugby union)
- :Megan Watts Hughes
- :Megan Webb
- :Megan York
- :Mei Jones
- :Meifod
- :Meinir Ffransis
- :Meirion Mill Railway
- :Meirionethshire Constabulary
- :Mel Nott
- :Mel Rees
- :Melbourne Welsh Church
- :Melin Adda
- :Melin Hywel
- :Melincourt Falls
- :Meline, Pembrokeshire
- :Melingriffith Brass Band
- :Melissa Fletcher
- :Melville Richards
- :Members of the 6th Senedd
- :Men of Harlech
- :Menai (Caernarfon ward)
- :Menai Bridge Tigers F.C.
- :Menai Bridge railway station
- :Menai Heritage Bridges Exhibition
- :Menefrida
- :Menna Fitzpatrick
- :Menna Gallie
- :Mental Capacity Act 2005
- :Merched y Wawr
- :Meredith (given name)
- :Merionethshire County Council
- :Merionethshire Railway
- :Merlin's Bridge
- :Mersley Park
- :Mert and Marcus
- :Merthyr Dyfan
- :Merthyr Mawr
- :Merthyr Mawr Sand Dunes
- :Merthyr Pioneer
- :Merthyr RFC
- :Merthyr Synagogue
- :Merthyr Tydfil Law Courts
- :Merthyr Tydfil Town Hall
- :Merthyr Tydfil railway station
- :Merthyr Vale railway station
- :Mervyn Bennett
- :Mervyn Davies, Baron Davies of Abersoch
- :Mervyn Roberts
- :Meurig Dafydd
- :Mewan
- :Mia Arnesby Brown
- :Michael Baer
- :Michael Bogdanov
- :Michael Crowe (footballer)
- :Michael D. Jones
- :Michael Harmer
- :Michael Johnston (Welsh footballer)
- :Michael Locke (stuntman)
- :Michael Tooby
- :Michael Wynn-Jones
- :Michaelston-le-Pit and Leckwith
- :Michaelston-y-Fedw
- :Michelle Brown
- :Mick Antoniw
- :Mid-Rhondda RLFC
- :Mid District Cup
- :Mid Wales Corporate Joint Committee
- :Mid and West Wales Fire and Rescue Service
- :Middle Mill
- :Middle Mouse
- :Middleholm
- :Middleton family
- :Mike Dowler
- :Mike Fantastic
- :Mike Hedges (politician)
- :Mike Jones (painter)
- :Mike Pearson (footballer)
- :Mildred Riddelsdell
- :Miles Thomas
- :Milford Central
- :Milford Hakin
- :Milford Haven Group
- :Milford Haven Museum
- :Milford Haven School
- :Milford Haven Town Hall
- :Milford West
- :Milford and Pembrokeshire Bank
- :Millbrook, Llanvihangel Crucorney
- :Millennium Coastal Park
- :Millennium Stadium Charitable Trust
- :Mind (charity)
- :Minera
- :Minera Lead Mines
- :Minffordd Hospital
- :Minwear
- :Minwear Wood
- :Miranda Aldhouse-Green
- :Miskin
- :Miskin Manor
- :Miskin Manor Cricket Club Ground
- :Mission Gallery
- :Mitch Clark (footballer, born 1999)
- :Mitchel Troy
- :Moat Lane Junction railway station
- :Moc Morgan
- :Mochdre, Conwy
- :Mochdre & Pabo railway station
- :Mochnant
- :Modron
- :Moel-y-Parc transmitting station
- :Moel Arthur
- :Moel Eilio
- :Moel Famau
- :Moel Maelogan
- :Moel Oernant
- :Moel Penderyn
- :Moel Ysgyfarnogod
- :Moel y Gaer, Bodfari
- :Moel y Gaer, Llanbedr
- :Moel y Gaer, Llantysilio
- :Moel y Gaer, Rhosesmor
- :Moel y Garnedd
- :Moel y Gest
- :Moel y Gydros
- :Moelfre, Anglesey
- :Mold Alexandra F.C.
- :Mold Castle
- :Mold Community Hospital
- :Mold Law Courts
- :Mold Town Hall
- :Mold and Denbigh Junction Railway
- :Molly Kelly (rugby union)
- :Molly Parkin
- :Momodou Touray
- :Monaughty House
- :Monington, Pembrokeshire
- :Monk Street, Monmouth
- :Monkton, Pembroke
- :Monmouth Baptist Church
- :Monmouth Cap
- :Monmouth Castle
- :Monmouth Cemetery
- :Monmouth County Gaol
- :Monmouth Methodist Church
- :Monmouth Museum
- :Monmouth Police Station
- :Monmouth Poor Law Union
- :Monmouth Troy railway station
- :Monmouth Women's Festival
- :Monmouth in the Mesolithic period
- :Monmouth town walls and defences
- :Monmouthpedia
- :Monmouthshire (UK Parliament constituency)
- :Monmouthshire Food Festival
- :Monmouthshire Libraries
- :Monnow Mill
- :Monnow Street
- :Monnow Vale Integrated Health and Social Care Facility
- :Montgomery County Infirmary
- :Montgomery Town Hall
- :Montgomery railway station
- :Monument to Sir Briggs
- :Morfa, Bridgend
- :Morfa, Swansea
- :Morfa Bychan
- :Morfa Conwy
- :Morfa Dyffryn
- :Morfa Nefyn
- :Morgan (surname)
- :Morgan B. Williams
- :Morgan Edwards
- :Morgan Gam
- :Morgan Hector Phillips
- :Morgan John Rhys
- :Morgan Morgans (engineer)
- :Morgan Morse
- :Morgan Owen
- :Morgan ab Athrwys
- :Morgan ab Owain
- :Morgan ap Hywel
- :Morgans Hotel, Swansea
- :Morganstown
- :Moriah Aman Chapel
- :Moridunum (Carmarthen)
- :Morlais Castle
- :Morris Castle
- :Morris Davies
- :Morris Williams
- :Morrys Scott
- :Morus Elfryn
- :Morvil
- :Morwyn Brebner
- :Morys Clynnog
- :Moss Valley, Wrexham
- :Moss Valley Branch
- :Mostyn
- :Mostyn (Llandudno electoral ward)
- :Mostyn (gallery)
- :Mostyn Colliery
- :Mostyn Hall
- :Mount Pleasant, Swansea
- :Mount Pleasant Hospital
- :Mountain (TV series)
- :Mountain Ash (electoral ward)
- :Mountain Ash East
- :Mountain Ash East (electoral ward)
- :Mountain Ash General Hospital
- :Mountain Ash RFC
- :Mountain Ash Town Hall
- :Mountain Ash railway station
- :Mountain rescue in England and Wales
- :Moylgrove
- :Mudiad Amddiffyn Cymru
- :Mumbles Battery
- :Mumbles Lighthouse
- :Mumbles Pier
- :Municipal Corporations Act 1835
- :Municipal Offices, Blaenavon
- :Murder of Muriel Drinkwater
- :MusicFest Aberystwyth
- :Mydan
- :Myddelton family
- :Myddfai
- :Myfanwy
- :Myfanwy Haycock
- :Myfanwy Howell
- :Myfanwy Pryce
- :Mynachlog-ddu
- :Mynydd-y-Gaer
- :Mynydd-y-Garreg
- :Mynydd-y-glog
- :Mynydd Allt-y-grug
- :Mynydd Bach
- :Mynydd Bach Trecastell
- :Mynydd Bedwellte
- :Mynydd Bodafon
- :Mynydd Carn-y-cefn
- :Mynydd Carningli
- :Mynydd Cilfach-yr-encil
- :Mynydd Dolgoed
- :Mynydd Eglwysilan
- :Mynydd Emroch television relay station
- :Mynydd Fforest
- :Mynydd Garnclochdy
- :Mynydd Graig Goch
- :Mynydd Hendre-ddu
- :Mynydd Illtud
- :Mynydd Llangorse
- :Mynydd Llangyndeyrn
- :Mynydd Llwyn-gwern
- :Mynydd Machen
- :Mynydd Mallaen
- :Mynydd Meio
- :Mynydd Merthyr
- :Mynydd Myddfai
- :Mynydd Nodol
- :Mynydd Pencarreg transmitting station
- :Mynydd Tir y Cwmwd
- :Mynydd Troed
- :Mynydd Twyn-glas
- :Mynydd William Meyrick
- :Mynydd y Betws
- :Mynydd y Dref
- :Mynydd y Drum
- :Mynydd y Gaer
- :Mynydd y Grug
- :Mynydd y Gwair
- :Mynydd y Lan
- :Mynyddbach Chapel
- :Mynyddislwyn
- :Mynytho
- :Myrddin Fardd
- :Myrddin Wyllt
- :Myriel Davies
- :Myrtle House
- :Môn FM
- :NCFE (charity)
- :NHS Pension Scheme
- :NHS Protect
- :NLW MS 20143A
- :NLW MS 24029A (Boston Manuscript)
- :Nancy Lee (writer)
- :Nancy Wright
- :Nannerch
- :Nansi Richards
- :Nansi Williams
- :Nant Ffrwdwyllt
- :Nant Glais Caves
- :Nant Gwrtheyrn
- :Nant Gwys
- :Nant Llech
- :Nant Menasgin
- :Nantclwyd y Dre
- :Nantcribba
- :Nanteos Mansion
- :Nantgarw
- :Nantgarw (High Level) Halt railway station
- :Nantgarw (Low Level) Halt railway station
- :Nantgarw China Works
- :Nantglyn
- :Nantlle Ridge
- :Nantlle railway station
- :Nantmel Landfill Site
- :Nantmor
- :Nantmor railway station
- :Nantybanw, Llantrisant
- :Nantybwch railway station
- :Nantycaws
- :Nantyglo
- :Nantyglo Round Towers
- :Nantyglo railway station
- :Narberth (electoral ward)
- :Narberth Castle
- :Narberth Hundred
- :Narberth Rural District
- :Narberth Town Hall
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- :Nash Manor
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- :Natasha Cockram
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- :National Health Service (Wales) Act 2006
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- :Neil Salathiel
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- :Nia Griffith
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- :Owen Owen (school inspector)
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- :Owen Thomas (politician)
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- :Padarn Halt railway station
- :Padarn Railway
- :Paddy Buckley Round
- :Paddy Hennessey
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- :Pantdreiniog quarry
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- :Panteg and Griffithstown railway station
- :Panteg cemetery
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- :Patience Agbabi
- :Patrick Jones (poet)
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- :Paul Brand (journalist)
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- :Paul Giles
- :Paul Griffiths (director)
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- :Pembroke Dock railway station
- :Pembroke Monkton and St Mary South
- :Pembroke Refinery
- :Pembroke River
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- :Pembroke Town Hall
- :Pembroke town walls
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- :Pen-y-Mount Junction railway station
- :Pen-y-cae, Wrexham
- :Pen-y-clawdd
- :Pen-y-clawdd Farmhouse, Raglan
- :Pen-y-crug
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- :Pen-y-groes (electoral ward)
- :Pen-yr-Orsedd quarry
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- :Penallt Old Church
- :Penallta Colliery
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- :Penally Abbey
- :Penar branch line
- :Penarth (Newtown and Llanllwchaiarn)
- :Penarth Dock railway station
- :Penarth Fawr
- :Penarth Lifeboat Station
- :Penarth Town Council
- :Penarth railway station
- :Penbanc
- :Penboyr
- :Penbryn
- :Pencader Tunnel
- :Pencaer
- :Pencarreg Halt railway station
- :Penclawdd RFC
- :Pencoed RFC
- :Penderyn distillery
- :Penderyn transmitting station
- :Pendine
- :Pendraig
- :Penffordd, Pembrokeshire
- :Penfro (cantref)
- :Pengam
- :Pengwern
- :Penhow
- :Penhow Castle
- :Penhow Woodlands National Nature Reserve
- :Peniarth 109
- :Peniarth 20
- :Peniarth Manuscripts
- :Penley
- :Penley Community Hospital
- :Penlle'r Castell
- :Penllergaer
- :Penllergare
- :Penllyn (cantref)
- :Penllyn railway station (Wales)
- :Penmachno
- :Penmachno quarry
- :Penmaen, Caerphilly
- :Penmaenmawr & Welsh Granite Co.
- :Penmaenmawr Phoenix F.C.
- :Penmaenmawr railway station
- :Penmoelallt
- :Penmynydd
- :Pennard
- :Penoyre House
- :Penpergwm railway station
- :Penperlleni
- :Penrhiw-ceibr
- :Penrhiwceiber
- :Penrhos Feilw Standing Stones
- :Penrhyn-coch
- :Penrhyn Bay
- :Penrhyn Castle Railway Museum
- :Penrhyn Du Mines
- :Penrhyn Quarry Railway
- :Penrhys
- :Penrice Castle
- :Penrydd
- :Penstrowed
- :Penterry
- :Pentlepoir
- :Pentraeth
- :Pentre
- :Pentre Berw
- :Pentre Broughton
- :Pentre Bychan
- :Pentre Camp
- :Pentre Galar
- :Pentre Halkyn
- :Pentre Ifan
- :Pentre Maelor
- :Pentrebach
- :Pentrecourt Platform railway station
- :Pentrecwrt
- :Pentrefoelas
- :Pentrehobyn
- :Pentremawr Colliery
- :Pentrepiod Halt railway station (Monmouthshire)
- :Pentwyn, Cardiff
- :Pentwyn, Llanllowell
- :Pentwyn, Rockfield
- :Pentwyn Farm Grasslands
- :Pentyrch
- :Penuel Baptist Chapel, Carmarthen
- :Penwyllt
- :Penyberth
- :Penybont F.C.
- :Penychain railway station
- :Penycloddiau
- :Penycwm
- :Penyffordd
- :Penyffordd railway station
- :Penygraig
- :Penygraig RFC
- :Penygroes, Gwynedd
- :Penygroes, Pembrokeshire
- :Penylan
- :Penywaun
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- :People Against Wylfa-B
- :Percy Bush
- :Percy Hughes (footballer)
- :Percy Thomas
- :Peredur Lynch
- :Permanent Secretary of the Welsh Government
- :Personal Ordinariate of Our Lady of Walsingham
- :Persondy, Mamhilad
- :Perth-hir House
- :Perthi-Duon Burial Chamber
- :Pete's Eats Cafe
- :Pete Fowler
- :Pete Ham
- :Peter Anthony Freeman
- :Peter Bailey Williams
- :Peter Bartrum
- :Peter Black (Welsh politician)
- :Peter Dawson (trade unionist)
- :Peter Finch (poet)
- :Peter George (author)
- :Peter Greenaway
- :Peter Havard-Williams
- :Peter Howells (economist)
- :Peter Jones (surgeon)
- :Peter Lord (art historian)
- :Peter Moore (serial killer)
- :Peter Rees Jones
- :Peter Roberts (priest)
- :Peter Rogers (politician)
- :Peter Vaughan (police officer)
- :Peter Wingfield
- :Peter de Leia
- :Peterston-super-Ely (electoral ward)
- :Peterston railway station
- :Petty treason
- :Peulan
- :Phaldut Sharma
- :Phil Bennett
- :Phil Edwards (boxer)
- :Phil Prosser
- :Phil Tanner
- :Philip Bisse
- :Philip Ellis (priest)
- :Philip George (cricketer)
- :Philip Jones (civil servant)
- :Philip Naylor-Leyland
- :Philip Pugh
- :Philip Squire
- :Philip Yorke (antiquary)
- :Phillida Nicholson
- :Phineas John
- :Phoebe Richards
- :Phyllis Maud Performance Space
- :Physicians of Myddfai
- :Pierce Memorial Garden
- :Pill Fort
- :Pill Harriers RFC
- :Pillar of Eliseg
- :Pilleth
- :Pipton
- :Pistyll Cain
- :Pitt's Head
- :Planed Plant
- :Planning Aid Wales
- :Plantasia
- :Plas-y-Nant railway station
- :Plas Bennett
- :Plas Bodegroes
- :Plas Bodewryd
- :Plas Brondanw
- :Plas Cadnant
- :Plas Coch
- :Plas Coch, Ruthin
- :Plas Machen
- :Plas Machynlleth
- :Plas Madoc F.C.
- :Plas Menai
- :Plas Mynach
- :Plas Newydd, Llangollen
- :Plas Taliaris
- :Plas Teg
- :Plasau Duon
- :Plasmarl
- :Plasnewydd
- :Plaza cinema, Port Talbot
- :Plymouth, Merthyr Tydfil
- :Plynlimon
- :Plynlimon and Hafan Tramway
- :Pocket Venus
- :Point FM
- :Point Lynas Lighthouse
- :Point of Ayr
- :Police Central e-Crime Unit
- :Police Superintendents' Association
- :Polo Grounds, New Inn
- :Poly-Olbion
- :Ponciau
- :Pont-ar-Gothi
- :Pont Aberglaslyn
- :Pont Abraham Services
- :Pont Briwet
- :Pont Croesor railway station
- :Pont Cych
- :Pont Cysyllte
- :Pont Fawr
- :Pont Llanio railway station
- :Pont Minllyn
- :Pontamman
- :Pontardawe
- :Pontardawe Arts Centre
- :Pontardawe television relay station
- :Pontarddulais Male Choir
- :Pontarddulais railway station
- :Pontfadog Oak
- :Pontfaen
- :Ponthir railway station
- :Pontllanfraith
- :Pontneddfechan
- :Pontnewydd
- :Pontnewynydd
- :Pontnewynydd railway station
- :Pontprennau
- :Pontprennau and Old St Mellons
- :Pontrhydyfen
- :Pontrhydyrun Halt railway station
- :Pontsionnorton
- :Pontsticill Reservoir
- :Pontsticill railway station
- :Pontyates
- :Pontyglasier
- :Pontygwaith, Rhondda Cynon Taf
- :Pontymister
- :Pontypool Park
- :Pontypool Town Hall
- :Pontypridd Cottage Hospital
- :Pontypridd Graig railway station
- :Pontypridd RLFC
- :Pontypridd Tram Road railway station
- :Pontypridd and Rhondda Valley Tramway
- :Pontypridd railway accident
- :Pontypridd railway station
- :Pool Quay
- :Port Dinorwic railway station
- :Port Eynon
- :Port Talbot (electoral ward)
- :Port Talbot Town F.C.
- :Port Talbot War Memorial
- :Port of Holyhead
- :Port of Port Talbot
- :Porth-Mawr Gatehouse
- :Porth-y-carn, Usk
- :Porth Dafarch
- :Porth yr Aur
- :Porthcawl railway station
- :Porthclais
- :Porthdinllaen
- :Porthdinllaen Lifeboat Station
- :Porthgain
- :Porthgain Railway
- :Porthkerry
- :Porthmadog F.C.
- :Porthmadog Harbour railway station
- :Porthmadog railway station (Welsh Highland Heritage Railway)
- :Portmeirion Town Hall
- :Portobello House
- :Portrait of the Artist as a Young Dog
- :Portskewett Pier railway station
- :Portskewett railway station
- :Postgraduate Certificate in Education
- :Pot Hole quarry
- :Powis Almshouses
- :Powyseg
- :Poyser Street drill hall, Wrexham
- :Preiddeu Annwfn
- :Premiership Rugby Sevens Series
- :Prendergast, Pembrokeshire
- :Presaddfed Burial Chamber
- :Presbyterian Church of India
- :Preseli transmitting station
- :Prestatyn
- :Prestatyn Castle
- :Prestatyn North
- :Prestatyn Town F.C.
- :Prestatyn railway station
- :Preston Austin
- :Prevenge
- :Price (surname)
- :Prince Llewellyn quarry
- :Prince Philip Hospital
- :Prince William Cup
- :Prince of Wales Inn
- :Priodas Pum Mil
- :Priory (Abergavenny ward)
- :Prison Commission (England and Wales)
- :Prisoner and Escort
- :Privies of Wales
- :Pro14 Rainbow Cup
- :Probation Service (England and Wales)
- :Prophwyd y Jubili
- :Proposed Welsh independence referendum
- :Prosiect Z
- :Prosser (surname)
- :Pryce Pryce-Jones
- :Pryderi
- :Public Access Legal Support
- :Public Access Scheme
- :Public Audit (Wales) Act 2004
- :Public Policy Institute for Wales
- :Puffin Island (Anglesey)
- :Pumsaint
- :Punch House, Monmouth
- :Puncheston
- :Purple Plaques
- :Pwll, Tregare
- :Pwll y wrach
- :Pwllglas
- :Pwllgwaelod
- :Pwllgwaun
- :Pwllheli Corporation Tramways
- :Pwllheli Lifeboat Station
- :Pwllheli Sailing Club
- :Pwllheli and Llanbedrog Tramway
- :Pwllheli railway station
- :Pwllpriddog Oak
- :Pwllyrhwyad, Llanarth
- :Pwyll
- :Pye Corner railway station
- :Pyle
- :Pyle railway station
- :Q Tour
- :Quakers Yard
- :Quakers Yard railway station
- :Quarries of Vaynor
- :Queen Gwendolen
- :Queens Arcade
- :Queens Head, Monmouth
- :Queensferry, Flintshire
- :Question The Mark
- :Quicksand (Welsh band)
- :R. B. Jones
- :R. Gwynedd Parry
- :R. Ifor Parry
- :RAF Mona
- :RGC 1404
- :ROF Newport
- :Race Horses
- :Rachael Solomon
- :Rachel Bromwich
- :Rachel Davies (Rahel o Fôn)
- :Rachel Evans
- :Rachel Redford
- :Rachel Rice
- :Rachel Rowe
- :Rachel Taylor (rugby union)
- :Rachel Thomas (actress)
- :Radio Bronglais
- :Radio Cardiff
- :Radio Carmarthenshire
- :Radio Ceredigion
- :Radio Tircoed
- :Radnorshire Arms
- :Radyr Golf Club
- :Radyr Hydro Scheme
- :Raglan Barracks, Newport
- :Raglan Hundred
- :Raglan Library
- :Raglan Road Crossing Halt railway station
- :Raglan railway station
- :Railway with a Heart of Gold
- :Ralph Churton
- :Ralph Evans (boxer)
- :Ralph Hancock (landscape gardener)
- :Ramoth Chapel
- :Rape Crisis England & Wales
- :Rassa Railroad
- :Ratgoed Tramway
- :Ratgoed quarry
- :Ray Chan (art director)
- :Ray Daniel (Welsh footballer)
- :Ray Lambert
- :Rayner Memorial Clock Tower
- :Rebecca De Filippo
- :Rebecca Evans (soprano)
- :Rebecca Llewellyn
- :Recreation Ground, Llansantffraid-ym-Mechain
- :Recreation Ground, Tredegar
- :Red Book of Hergest
- :Red Dragon Centre
- :Red Roses
- :Red Wharf Bay and Benllech railway station
- :Red Wharf Bay branch line
- :Redbrook Incline Bridge
- :Redrow plc
- :Redwick, Newport
- :Redwood Building
- :Redwood Memorial Hospital
- :Rees Davies
- :Reg Parker (footballer)
- :Reg Turnell
- :Reggie Gibbs
- :Regimental Museum of The Royal Welsh
- :Regional Offender Manager
- :Registered historic parks and gardens in Blaenau Gwent
- :Registered historic parks and gardens in Cardiff
- :Registered historic parks and gardens in Torfaen
- :Rent regulation in England and Wales
- :Representative Body of the Church in Wales
- :Requiem (TV series)
- :Residential Property Tribunal Wales
- :Rest Bay (electoral ward)
- :Reynalton
- :Rhaeadr y Cwm
- :Rhayader
- :Rhayader railway station
- :Rhayader television relay station
- :Rheinallt Nantlais Williams
- :Rhian Cleverly
- :Rhian Edwards (poet)
- :Rhian Samuel
- :Rhiannon Roberts
- :Rhianon Passmore
- :Rhigos
- :Rhisiart Morgan Davies
- :Rhiw-goch quarry, Conwy
- :Rhiwbach Tramway
- :Rhiwbach quarry
- :Rhiwbina Garden Village
- :Rhiwderin railway station
- :Rhiwlas, Llandderfel
- :Rhobell Fawr
- :Rhod Gilbert
- :Rhodri Glyn Thomas
- :Rhodri Molwynog
- :Rhodri Talfan Davies
- :Rhondda East (UK Parliament constituency)
- :Rhondda Heritage Park
- :Rhondda Leader
- :Rhondda Tramways Company
- :Rhondda Transport Company
- :Rhondda Tunnel
- :Rhondda West (UK Parliament constituency)
- :Rhoose
- :Rhos-on-Sea
- :Rhos Aelwyd F.C.
- :Rhos Baptist Chapel, Mountain Ash
- :Rhoscrowther
- :Rhosddu
- :Rhosddu Recreation Ground
- :Rhosesmor
- :Rhoshill, Pembrokeshire
- :Rhosllanerchrugog F.C. (1889)
- :Rhosllanerchrugog F.C. (2017)
- :Rhosneigr railway station
- :Rhosnesni
- :Rhosnesni High School
- :Rhosrobin
- :Rhostyllen
- :Rhostyllen F.C.
- :Rhosybol
- :Rhosydd Llanpumsaint
- :Rhual
- :Rhuddlan
- :Rhuddlan Castle
- :Rhuddlan railway station
- :Rhug
- :Rhun Hir ap Maelgwn
- :Rhyd Ddu railway station
- :Rhydlafar
- :Rhydlewis
- :Rhydtalog
- :Rhydycroesau
- :Rhydyfelin
- :Rhydyfelin (Low Level) Halt railway station
- :Rhydypennau, Ceredigion
- :Rhyl Deanery
- :Rhyl Golf Club
- :Rhyl Ladies F.C.
- :Rhyl Lifeboat Station
- :Rhyl Miniature Railway
- :Rhyl Town Hall
- :Rhyl West
- :Rhyl railway station
- :Rhymney
- :Rhymney Bridge railway station
- :Rhymney Valley Ridgeway Walk
- :Rhymney railway station
- :Rhys Davies (golfer)
- :Rhys Edwards
- :Rhys Gabe
- :Rhys Gruffydd
- :Rhys Ifans
- :Rhys Jones (archaeologist)
- :Rhys Morgan (rugby union)
- :Rhys Norrington-Davies
- :Rhys Priestland
- :Rhys Taylor
- :Rhys Williams (Welsh actor)
- :Rhys Williams (hurdler)
- :Rhys Wilmot
- :Rhys ap Gruffydd (rebel)
- :Rhys ap Rhydderch
- :Ricemarch Psalter
- :Richard Booth
- :Richard Brake
- :Richard Bulkeley (died 1573)
- :Richard Bulkeley (died 1621)
- :Richard Davies (Quaker)
- :Richard Davies (bishop)
- :Richard Davies (trade unionist)
- :Richard Edwards (Welsh politician)
- :Richard Edwards (educator)
- :Richard Ellis (librarian)
- :Richard Fenton
- :Richard Geraint Rees
- :Richard Griffiths (industrialist)
- :Richard Gwyn (Welsh writer)
- :Richard Haig
- :Richard Hancorne
- :Richard Harries, Baron Harries of Pentregarth
- :Richard Hughes Williams
- :Richard Hurlin
- :Richard John Lloyd Price
- :Richard Jones (Ruthin priest)
- :Richard Jones (priest, born 1603)
- :Richard Lancaster
- :Richard Lathrop
- :Richard Livsey, Baron Livsey of Talgarth
- :Richard Lloyd (Cardigan politician)
- :Richard Llwyd
- :Richard Lucas (priest)
- :Richard Martin (Mayor of Swansea)
- :Richard Mathias
- :Richard Meade
- :Richard Meredith (bishop)
- :Richard Middleton (priest)
- :Richard Milbourne
- :Richard Owen (minister)
- :Richard Pain
- :Richard Parry-Jones
- :Richard Rawlins
- :Richard Richards (judge)
- :Richard Smalbroke
- :Richard Thomas (priest)
- :Richard Thomas and Baldwins
- :Richard Trevor (bishop)
- :Richard Valentine Pitchford
- :Richard Vaughan (died 1734)
- :Richard Williams (alias Cromwell)
- :Richards Brothers
- :Ricky Evans (rugby union)
- :Ricky Wright (ring announcer)
- :Rights of Children and Young Persons (Wales) Measure 2011
- :Rigrawst
- :Ring of bells
- :Ringland, Newport
- :Ririd Myddelton
- :Risca railway station
- :River Camlad
- :River Clywedog
- :River Dysynni
- :River Garw
- :River Gavenny
- :River Gwaun
- :River Gwenfro
- :River Haffes
- :River Honddu (Monmouthshire)
- :River Honddu (Powys)
- :River Kenfig
- :River Llynfi
- :River Mellte
- :River Neath
- :River Nevern
- :River Rhiw
- :River Sawdde
- :River Syfynwy
- :River Thaw
- :River Towy
- :Riverside, Cardiff
- :Riversimple
- :Roath
- :Roath Lock
- :Rob Evans (footballer)
- :Rob Howley
- :Rob McCusker
- :Rob Partridge
- :Rob Wainwright (civil servant)
- :Robbie Burton (footballer)
- :Robert Baugh
- :Robert Bryan (poet)
- :Robert Davies (antiquary, died 1728)
- :Robert Davies Roberts
- :Robert Francis Jenner
- :Robert Glatzel
- :Robert Huber
- :Robert Hughes (poet)
- :Robert Isaac Jones
- :Robert J. Davies
- :Robert Jones (writer)
- :Robert Jones Derfel
- :Robert Knight (cricketer, born 1858)
- :Robert Lee Roberts
- :Robert Lougher
- :Robert Mills-Roberts
- :Robert Morton Nance
- :Robert Myddelton (1678–1733)
- :Robert Owen (theologian)
- :Robert Pugh (Jesuit)
- :Robert Puleston
- :Robert Roberts (footballer, born 1864)
- :Robert Roberts (footballer, born 1865)
- :Robert Roberts (priest)
- :Robert Rowthorn
- :Robert Sherborne
- :Robert Shields (VC)
- :Robert Sidoli
- :Robert Thomas Jenkins
- :Robert Vaughn (Montana rancher)
- :Robert Williams (Robert ap Gwilym Ddu)
- :Robert Wynne (Chancellor of St Asaph)
- :Robin Hood Inn, Monmouth
- :Robin Huw Bowen
- :Robin Llwyd ab Owain
- :Robyn Lock
- :Rock Mill Llandysul
- :Rock cannon
- :Rockfield, Monmouthshire
- :Rockfield Studios
- :Roger Addison
- :Roger Edwards (Calvinist)
- :Roger Hackney
- :Roger Mortimer of Wigmore
- :Roger Roberts, Baron Roberts of Llandudno
- :Rogerstone railway station
- :Rogiet
- :Rogiet Primary School
- :Rollin Menayese
- :Roman Bridge railway station
- :Roman Catholic Diocese of Menevia
- :Roman Catholic Diocese of Newport and Menevia
- :Roman Catholic Diocese of Wrexham
- :Roman Jugg
- :Ron Davies (footballer, born 1942)
- :Ron Jones (commentator)
- :Ronald Lockley
- :Ronald Mathias
- :Ronnie Boon
- :Ronnie James
- :Rookwood Hospital
- :Rory Sutherland (advertising executive)
- :Rosalie K. Fry
- :Rosalind Hall
- :Rosalind Rusbridge
- :Rose Davies (activist)
- :Rosebush, Pembrokeshire
- :Rosemarket
- :Rosina Davies
- :Rossett
- :Rotherslade
- :Rough Cut (TV series)
- :Rowen, Conwy
- :Rowland Jones
- :Rowland Lee (bishop)
- :Rowland Meyrick
- :Rowland Phillips (rugby)
- :Rowland Vaughan (poet)
- :Rowland Williams (Hwfa Môn)
- :Rowland Williams (theologian)
- :Rowley Thomas
- :Roy Francis (rugby)
- :Roy John (rugby union)
- :Royal Arcade, Cardiff
- :Royal George House
- :Royal Glamorgan Hospital
- :Royal House, Machynlleth
- :Royal Porthcawl Golf Club
- :Royal Watercolour Society of Wales
- :Royal Welch Fusiliers Museum
- :Royal Welsh Ladies' Choir
- :Ruabon Brook Tramway
- :Ruabon Grammar School
- :Ruabon Moors
- :Ruabon railway station
- :Rubin Colwill
- :Rudbaxton
- :Rudbaxton Rath
- :Rumney, Cardiff
- :Rungano Nyoni
- :Runston Chapel
- :Ruperra Motte
- :Rupert Charles Barneby
- :Rupert Moon
- :Rupert Morris
- :Russell Deacon
- :Russell George (Welsh politician)
- :Russell Goodway
- :Rusty Shackle
- :Ruth Dunning
- :Ruth Frankenberg
- :Ruth Herbert Lewis
- :Rutherford Health
- :Ruthin Castle
- :Ruthin Community Hospital
- :Ruthin Craft Centre
- :Ruthin Gaol
- :Ruthin Rural District
- :Ruthin Town Hall
- :Ryan Conbeer
- :Ryan Davies
- :Ryan Day (snooker player)
- :Ryan Howley
- :Ryan Leak
- :Ryan Nicholls
- :Rydal Penrhos
- :S4C Digital Networks
- :SA1 Swansea Waterfront
- :SY postcode area
- :Sabrina Fortune
- :Sadie Allen
- :Safia Middleton-Patel
- :Sage Todz
- :Saint Afan
- :Saint Baglan
- :Saint Cadfan
- :Saint Callwen
- :Saint Canna
- :Saint Dyfnog
- :Saint Edern
- :Saint Elen
- :Saint Elli
- :Saint Eluned
- :Saint Grwst
- :Saint Iestyn
- :Saint Ilar
- :Saint Mary & Saint Philopateer Abu Saifain Coptic Orthodox Church
- :Saint Materiana
- :Saint Peris
- :Saint Tathyw
- :Saint Tudno
- :Saint Tudwal's Islands
- :Saint Twrog
- :Saint Tydecho
- :Salem Chapel, Robertstown
- :Salem Independent Chapel, Llandovery
- :Sali Hughes
- :Sally Peake
- :Sally Roberts Jones
- :Salt Island, Anglesey
- :Saltney
- :Salusbury baronets
- :Salvia (artist)
- :Sam Cross
- :Sam O'Connor (rugby union)
- :Samuel C. Hughes
- :Samuel Ellis and Company
- :Samuel Ifor Enoch
- :Samuel Instone
- :Samuel Jones (nonconformist)
- :Sanatorium Park
- :Sandfields, Port Talbot
- :Sandfields, Swansea
- :Sandfields West
- :Sandford principle
- :Sanjeev Gupta
- :Sara Head
- :Sara Sugarman
- :Sarah Edith Wynne
- :Sarah Jacob
- :Sarah Prescott
- :Sarah Thomas (centenarian)
- :Sarah Wiltshire
- :Sardis, south Pembrokeshire
- :Sardis, southeast Pembrokeshire
- :Sarn, Powys
- :Sarn Complex
- :Saron Chapel, Aberaman
- :Sarra Elgan
- :Saughall railway station
- :Saundersfoot Railway
- :Sbardun
- :Sbectel
- :Scarlet FM
- :Scarlet Rebels
- :Scethrog Tower
- :Scheduled monuments in Carmarthenshire
- :Scheduled monuments in Ceredigion
- :Scheduled monuments in Gwynedd
- :Scleddau
- :Scolton Manor
- :Scope (charity)
- :Scott Davies (cyclist)
- :Scott Smith (footballer, born 2001)
- :Scott van-der-Sluis
- :Scourfield baronets
- :Scouting in Wales
- :Scoveston
- :Scoveston Fort
- :Sea Roads
- :Sea Sketches
- :Seabank Hotel
- :Sealand railway station
- :Sealyham House
- :Sebastopol, Torfaen
- :Sebastopol railway station
- :Second Drakeford government
- :Secretary of State for Justice
- :Seelie
- :Seion Chapel, Cwmaman
- :Seiont (electoral ward)
- :Seisyll ap Clydog
- :Seithenyn
- :Selwyn Biggs
- :Senghenydd RFC
- :Seren Books
- :Seren Bundy-Davies
- :Seren Network
- :Seren Smale
- :Sesswick
- :Seth Joshua
- :Seth Powell
- :Seven Eyes
- :Seven Sisters, Neath Port Talbot
- :Seven Sisters (electoral ward)
- :Seven Sisters RFC
- :Severn (Caldicot ward)
- :Severnside
- :Sexual abuse scandal in the Roman Catholic Archdiocese of Cardiff
- :Seymour Berry, 1st Baron Buckland
- :Shaheen Jafargholi
- :Shan Morgan
- :Shaun Pejic
- :Sheep shagger
- :Shell Grotto, Pontypool
- :Sheriff of Carmarthen
- :Shire Hall, Haverfordwest
- :Shire Hall, Llandeilo
- :Shire Hall, Llangefni
- :Shire Hall, Newport
- :Shire Hall, Presteigne
- :Shirenewton
- :Shirenewton Hall
- :Shirley Dynevor
- :Shirley Jones (artist)
- :Shona Powell-Hughes
- :Shoni Sguborfawr
- :Short mat bowls
- :Shotton, Flintshire
- :Shotton railway station
- :Sian Gibson
- :Sian Williams (rugby union)
- :Sifil A.F.C.
- :Silian Halt railway station
- :Siloah Chapel, Llanelli
- :Siloh Chapel, Trecynon
- :Silvanus Bevan
- :Silver Star Holidays
- :Simon Davey
- :Simon Hart
- :Simon Lloyd (priest, born 1756)
- :Simon Thomas (politician)
- :Sinfonia Newydd
- :Singleton Park
- :Sioned Harries
- :Sioned James
- :Sioned Williams
- :Sir Charles Morgan, 2nd Baronet
- :Sir Edward Morgan, 1st Baronet
- :Sir Evan Williams, 1st Baronet
- :Sir Gruffydd Llwyd
- :Sir Haydn (locomotive)
- :Sir Hugh Owen, 1st Baronet
- :Sir Hugh Owen, 2nd Baronet (1641 creation)
- :Sir Hugh Owen Owen, 2nd Baronet
- :Sir John Owen, 1st Baronet
- :Sir John Philipps, 1st Baronet
- :Sir John Pryce, 1st Baronet
- :Sir Rhys ap Gruffydd
- :Sir Roger Mostyn, 3rd Baronet
- :Sir Thomas Lloyd, 1st Baronet
- :Sir Thomas Salusbury, 2nd Baronet
- :Sir Thomas Wynn, 1st Baronet
- :Sir William James Thomas, 1st Baronet
- :Sirhowy
- :Sirhowy Railway
- :Siwan Davies
- :Siwan Lillicrap
- :Six Bells
- :Six Bells Colliery
- :Six Bells Halt railway station
- :Sixth form college
- :Size of Wales
- :Siân Evans
- :Siân Pari Huws
- :Skanda Vale
- :Skanda Vale Hospice
- :Skenfrith
- :Sker House
- :Skerries Lighthouse
- :Sketty
- :Sketty Hall
- :Skewen
- :Skewen railway station
- :Skills and Volunteering Cymru
- :Skokholm Lighthouse
- :Skrinkle Sandstones Group
- :Slate operations on the Welsh Highland Railway
- :Sleath Farmhouse, Llangua
- :Slebech
- :Slowly Rolling Camera
- :Slwch Tump
- :Smallest House in Great Britain
- :Smalls Lighthouse
- :Smart's Bridge
- :Smarts Quarry
- :Snelling Sevens
- :Snowdon Ranger railway station
- :Snowdon Volcanic Group
- :Snowdonia Marathon
- :Snowdonia Society
- :Soar Chapel, Cwmaman
- :Soar Chapel, Llanelli
- :Soar Chapel, Llwydcoed
- :Society of Gentleman Practisers in the Courts of Law and Equity
- :Sodston Manor
- :Solicitor General for England and Wales
- :Solva
- :Solva Woollen Mill
- :Solva limekilns
- :Somerton Park
- :Somerton TARDIS
- :Sona Burstein
- :Sophia Crichton-Stuart, Marchioness of Bute
- :Sophia Gardens (cricket ground)
- :Sophia Smale
- :Sophie Anderson (author)
- :Sophie Howe
- :Sophie Melville
- :Sorba Thomas
- :Sosban Fach
- :Soul Crew
- :South Bishop Lighthouse
- :South East Wales Corporate Joint Committee
- :South East Wales Transport Alliance
- :South Glamorgan County Council
- :South Glamorganshire (UK Parliament constituency)
- :South Hook LNG terminal
- :South Monmouthshire (UK Parliament constituency)
- :South Stack
- :South Wales Coast and Severn Estuary Coastal Path
- :South Wales East (Senedd electoral region)
- :South Wales Geologists' Association
- :South Wales Men's League
- :South Wales Mineral Railway
- :South Wales Miners' Museum
- :South Wales Mountaineering Club
- :South Wales Trunk Road Agent
- :South West Wales Corporate Joint Committee
- :Southern Distributor Road
- :Southern Examining Group
- :Southerndown Coast
- :Southerndown Road railway station
- :Southgate, Swansea
- :Sparks in the Park
- :Spectrum Technologies
- :Spencer Davis
- :Spencer John
- :Spillers Records
- :Spittal, Pembrokeshire
- :St-y-Nyll
- :St. Athan railway station
- :St. David's Shopping Centre (Swansea)
- :St. Davids Polo and Racing Club
- :St Afan's Church, Llanafan
- :St Alban's Church, Llanelli
- :St Alban-on-the-Moors Church
- :St Andrew's Church, Bayvil
- :St Andrew's Church, Penrice
- :St Andrew's Church, Presteigne
- :St Andrew's Church, Tredunnock
- :St Andrews Major
- :St Anne's Church, Ynyshir
- :St Anne's House, Tintern
- :St Anno's Church, Llananno
- :St Asaph (Denbigh) Rural District
- :St Athan (electoral ward)
- :St Athan Road railway station
- :St Augustine's Church, Penarth
- :St Augustine's Church, Rumney
- :St Baglan's Church, Llanfaglan
- :St Bartholomew's Church, Llanover
- :St Bartholomew's Church, Sealand
- :St Benedict's Church, Gyffin
- :St Beuno's Church, Clynnog Fawr
- :St Beuno's Church, Penmorfa
- :St Beuno's Church, Pistyll
- :St Bilo's Church, Llanfilo
- :St Bride's Church, Llansantffraed
- :St Brides
- :St Brides Castle
- :St Brides Netherwent
- :St Bridget's Church, Skenfrith
- :St Bridget's Church, St Brides Wentlooge
- :St Brothen's Church, Llanfrothen
- :St Cadoc's Church, Caerleon
- :St Cadoc's Church, Cheriton
- :St Cadoc's Church, Glynneath
- :St Cadoc's Church, Llancarfan
- :St Cadoc's Church, Llangattock-juxta-Usk
- :St Cadoc's Church, Llangattock Lingoed
- :St Cadoc's Church, Llangattock Vibon Avel
- :St Cadoc's Church, Penrhos
- :St Cadoc's Church, Raglan
- :St Cadoc's Hospital
- :St Canna Church, Llangan
- :St Catharine's Church, Baglan
- :St Catherine's Church, Pontypridd
- :St Catherine's Fort
- :St Catherine's Island
- :St Catwg's Church, Cwmcarvan
- :St Catwg's Church, Gelligaer
- :St Cawrdaf's Church, Abererch
- :St Cenedlon's Church, Rockfield
- :St Cewydd's Church, Disserth
- :St Clears Town Hall
- :St Collen's Church, Llangollen
- :St Crallo's Church
- :St Cybi's Church, Llangybi, Monmouthshire
- :St Cynhaearn's Church, Ynyscynhaearn
- :St Cynhafal's Church, Llangynhafal
- :St Cynog's Church, Defynnog
- :St Cyres School
- :St David's, Cardiff
- :St David's (Pembrokeshire electoral ward)
- :St David's Catholic College
- :St David's Church, Glascwm
- :St David's Church, Hubberston
- :St David's Church, Laleston
- :St David's Church, Llanddew
- :St David's Church, Llanddewi Brefi
- :St David's Church, Llanddewi Rhydderch
- :St David's Church, Llanddewi Skirrid
- :St David's Church, Llanfaes
- :St David's Church, Llangeview
- :St David's Church, Llanthony
- :St David's Church, Trostrey
- :St David's Church (Eglwys Dewi Sant), Carmarthen
- :St David's Hospital, Carmarthen
- :St David's Hotel, Harlech
- :St David's Welsh Church, Colwyn Bay
- :St David Lewis and St Francis Xavier Church, Usk
- :St Davids City Hall
- :St Davids Society of Singapore
- :St Decuman's Church, Rhoscrowther
- :St Derfel's Church, Llandderfel
- :St Dingat's Church, Dingestow
- :St Dochdwy's Church, Llandough
- :St Dogmaels
- :St Dogmaels television relay station
- :St Dogmells Rural District
- :St Donat's Church, St Donats
- :St Donat's Church, Welsh St Donats
- :St Dyfnog's Church, Llanrhaeadr
- :St Edward's Church, Roath
- :St Elidyr's Church, Stackpole
- :St Elli's Church, Llanelly
- :St Ellyw's Church, Llanelieu
- :St Elvan's Church, Aberdare
- :St Elvis, Pembrokeshire
- :St Engan's Church, Llanengan
- :St Ethelwold's Church, Shotton
- :St Fagan's Church, Trecynon
- :St Fagans
- :St Fagans railway station
- :St Florence
- :St George's Channel
- :St Georges super Ely
- :St Govan's Chapel
- :St Govan's Church, Llangovan
- :St Gredifael's Church, Penmynydd
- :St Grwst's Church, Llanrwst
- :St Gwenog's Church
- :St Gwynhoydl's Church, Llangwnnadl
- :St Hilary's Church, St Hilary, Vale of Glamorgan
- :St Hilary Platform railway station
- :St Hilary transmitting station
- :St Hywyn's Church, Aberdaron
- :St Iestyn's Church, Llaniestyn, Gwynedd
- :St Illtyd
- :St Ishmaels
- :St Issui's Church, Partrishow
- :St James's Church, Llangua
- :St James's Church, Rudry
- :St James Square, Monmouth
- :St Jerome's Church, Llangwm
- :St John's, Monmouth
- :St John's Church, Aberdare
- :St John's Church, Llandenny
- :St John Ambulance Cymru
- :St John the Baptist Church, Cardiff
- :St John the Baptist Church, Porthcawl
- :St John the Baptist School, Aberdare
- :St Joseph's Cathedral, Swansea
- :St Joseph's Catholic and Anglican High School
- :St Joseph's Church, Cardiff
- :St Joseph's Church, Port Talbot
- :St Joseph's Hospital, Newport
- :St Joseph's Roman Catholic High School, Newport
- :St Julians, Newport
- :St Justinian
- :St Justinian's Chapel
- :St Lawrence Hospital, Chepstow
- :St Lythans
- :St Madoc's Church, Llanbadoc
- :St Maethlu's Church, Llanfaethlu
- :St Marcella's Church, Denbigh
- :St Margaret's Island
- :St Mark's Church, Connah's Quay
- :St Mark's Church, Newport
- :St Martin's Church, Cwmyoy
- :St Martin's Church, Pen-y-clawdd
- :St Martin's Comprehensive School
- :St Mary's (Chepstow ward)
- :St Mary's Abbey ruins, Bardsey Island
- :St Mary's Church, Beddgelert
- :St Mary's Church, Betws-y-Coed
- :St Mary's Church, Brecon
- :St Mary's Church, Caerhun
- :St Mary's Church, Caldicot
- :St Mary's Church, Carew
- :St Mary's Church, Chirk
- :St Mary's Church, Downe
- :St Mary's Church, Gladestry
- :St Mary's Church, Haverfordwest
- :St Mary's Church, Llanfair-ar-y-bryn
- :St Mary's Church, Llanfair-yn-Neubwll
- :St Mary's Church, Llanfairpwllgwyngyll
- :St Mary's Church, Llanllwch
- :St Mary's Church, Magor
- :St Mary's Church, Nash
- :St Mary's Church, Pembroke
- :St Mary's Church, Penllech
- :St Mary's Church, Portskewett
- :St Mary's Church, Rogiet
- :St Mary's Church, Ruabon
- :St Mary's Church, St Fagans
- :St Mary's Church, Swansea
- :St Mary's Church, Tenby
- :St Mary's Church, Tregare
- :St Mary's Church, Undy
- :St Mary's Church, Welshpool
- :St Mary's Church, Whitchurch
- :St Mary's College, Aberystwyth
- :St Mary's Roman Catholic Church, Monmouth
- :St Mary Church Road railway station
- :St Mary Hill
- :St Mary Magdalene's Church, Bleddfa
- :St Mary Out Liberty
- :St Mary Street/High Street
- :St Mary and All Saints' Church, Conwy
- :St Mary and St Bodfan Church, Llanaber
- :St Mary and St Egryn's Church, Llanegryn
- :St Matthew's Church, Llandefalle
- :St Matthew's Church, Saltney
- :St Mechell's Church, Llanfechell
- :St Mellons Church
- :St Mellons Rural District
- :St Meugan's Church, Llanrhydd
- :St Michael's Church, Llanfihangel Tor-y-Mynydd
- :St Michael's Church, Llanvihangel Crucorney
- :St Michael's Church, Llanvihangel Gobion
- :St Michael's Church, Michaelchurch-on-Arrow
- :St Michael's Church, Michaelston-le-Pit
- :St Michael's Church, Myddfai
- :St Michael's Church, Rudbaxton
- :St Michael's Church, Tremain
- :St Michael's School, Llanelli
- :St Michael and All Angels' Church, Welshampton
- :St Michael and All Angels, Mitchel Troy
- :St Michael and All Angels Church, Colwinston
- :St Michael and All Angels Church, Llanfihangel Rogiet
- :St Michael and All Angels Church, Tongwynlais
- :St Nicholas & St John, Monkton
- :St Nicholas Church, Church Stoke
- :St Odoceus' Church, Llandawke
- :St Padarn's Church, Llanberis
- :St Padarn's Institute
- :St Padrig's Church, Llanbadrig
- :St Patrick's Church, Newport
- :St Paul's Church, Colwyn Bay
- :St Paul's Church, Newport, Wales
- :St Peris's Church, Nant Peris
- :St Peter's Church, Bryngwyn
- :St Peter's Church, Glasbury
- :St Peter's Church, Llanwenarth
- :St Peter's Church, Roath
- :St Peter's Church, Wentlooge
- :St Peter ad Vincula, Pennal
- :St Philip's Church, Caerdeon
- :St Pierre, Monmouthshire
- :St Saeran's Church, Llanynys
- :St Saviour's Church, Splott
- :St Senwyr's Church
- :St Silin's Church, Llansilin
- :St Teilo's Church, Llanarth
- :St Teilo's Church, Llandeilo
- :St Teilo's Church, Llandeilo Tal-y-bont
- :St Teilo's Church, Llandeloy
- :St Teilo's Church, Llantilio Crossenny
- :St Teilo's Church, Llantilio Pertholey
- :St Teilo's Church in Wales High School
- :St Tewdric's Church
- :St Theodore's Church, Port Talbot
- :St Thomas, Swansea
- :St Thomas à Becket Chapel, Milford Haven
- :St Trygarn's Church, Llandrygarn
- :St Twrog's Church, Maentwrog
- :St Tydfil's Hospital
- :St Tyfi's Church, Llandyfeisant
- :St Tysilio's Church, Llantysilio
- :St Tysoi's Church, Llansoy
- :St Winefride's Church, Holywell
- :St Winifred's School
- :St Wonnow's Church, Wonastow
- :St Woolos Hospital
- :Stable Block, Tredegar House
- :Stack Rock Fort
- :Stackpole Estate
- :Stackpole and Castlemartin
- :Stagecoach South Wales
- :Stan Richards (footballer)
- :Stanage Park
- :Stanley Cornwell Lewis
- :Stanley Embankment
- :Stanley Sailors' Hospital
- :Stanley Winmill
- :Stansty
- :Star, Pembrokeshire
- :Stebonheath Park
- :Steel Company of Wales Ground
- :Steelfab
- :Steelhouse Festival
- :Steeltown Murders
- :Stefan Jenkins
- :Steffan Lewis
- :Steffan Rhodri
- :Stelvio House, Newport
- :Stepaside, Pembrokeshire
- :Stephen Knight (poet)
- :Stephen Morris (runner)
- :Stephen Williams (cyclist)
- :Stepney baronets
- :Steve Curtis (boxer)
- :Steve Morris (rugby union)
- :Steve Rowland (footballer)
- :Steve Sims (boxer)
- :Steynton
- :Stow Hill
- :Stradey Castle
- :Strata Florida railway station
- :Strata Marcella
- :Striguil
- :Strumble Head
- :Strumble Head Lighthouse
- :Stryt Las Park
- :Stuart Davies (rugby union)
- :Stuart Harrison
- :Stuart Richardson
- :Stuart Williams (footballer)
- :Studio with Gloves
- :Stwnsh
- :Submarine (2010 film)
- :Sudbrook, Monmouthshire
- :Sue Butterworth
- :Sue Jones-Davies
- :Sugar Loaf, Monmouthshire
- :Sugar Loaf railway station
- :Sully Centurions Cricket Club Ground
- :Sully Hospital
- :Sully Island
- :Sully railway station
- :Summerhill, Pembrokeshire
- :Summerhill, Wrexham
- :Summit railway station (Snowdon Mountain Railway)
- :Survey of Anglo-Welsh Dialects
- :Susan Elan Jones
- :Susannah Jane Rankin
- :Suspensory Act 1914
- :Swanbridge railway station
- :Swanline
- :Swansea Airport
- :Swansea Barrage
- :Swansea Bay (region)
- :Swansea Bay City Region
- :Swansea Bay Radio
- :Swansea Beach
- :Swansea Civic Centre
- :Swansea Constitution Hill Incline Tramway
- :Swansea Crown Court
- :Swansea Devil
- :Swansea District line
- :Swansea Enterprise Park
- :Swansea Grand Theatre
- :Swansea Guildhall
- :Swansea Harriers Athletics Club
- :Swansea Improvements and Tramway Company
- :Swansea Jack
- :Swansea Magpies
- :Swansea Maliphant Depot
- :Swansea Metropolitan University
- :Swansea Museum
- :Swansea NHS Trust
- :Swansea Philharmonic Choir
- :Swansea SW Wales (DAB Multiplex)
- :Swansea University Medical School
- :Swansea Vale Railway
- :Swansea War Memorial
- :Swing Bridge, River Neath
- :Swiss Cottage, Rockfield
- :Swyddfa'r Sir
- :Swyddffynnon
- :Sychdyn
- :Sychnant Pass
- :Syd Morgan
- :Syd Thomas
- :Syd Worgan
- :Sylvia Gore
- :Syr Hywel y Fwyall
- :Sŵnami
- :T. E. Nicholas
- :T. Gwynn Jones
- :T. Rowland Hughes
- :TJ's
- :TSS St David (1947)
- :Tabernacle Baptist Chapel, Cwmyoy
- :Tabernacle Chapel, Abercynon
- :Tabernacle Chapel, Aberdare
- :Tabernacle Chapel, Llandovery
- :Tabernacle Chapel, Morriston
- :Tabernacle Chapel, Ynysybwl
- :Tafarn Sinc
- :Taff's Well
- :Taff Bargoed
- :Taff Vale Park
- :Taffs Well railway station
- :Taffy was a Welshman
- :Taibach
- :Taint (band)
- :Tair Carn Uchaf
- :Tako Taal
- :Tal-y-Cafn
- :Tal-y-Cafn railway station
- :Tal-y-bont, Ceredigion
- :Tal-y-bont, Conwy
- :Tal-y-llyn, Anglesey
- :Tal-y-llyn, Gwynedd
- :Tal-y-llyn Lake
- :Tal Selley
- :Tal y Fan
- :Talbot Athletic Ground
- :Talbot Green
- :Tales from the Green Valley
- :Talgarth Town Hall
- :Talgarth railway station
- :Taliesin Arts Centre
- :Taliesin Williams
- :Talisa García
- :Talley Lakes
- :Talley transmitting station
- :Talsarn Halt railway station
- :Talybont-on-Usk
- :Talybont-on-Usk (electoral ward)
- :Talyllyn (locomotive)
- :Talysarn
- :Talywain
- :Tammy Jones
- :Tamsin Dunwoody
- :Tan-y-Bwlch railway station
- :Tan-y-Manod railway station
- :Tanyfron
- :Tanygrisiau
- :Taplas
- :Tara Bethan
- :Tarian y Gweithiwr
- :Tarki Micallef
- :Tavernspite
- :Tawe-Uchaf
- :Tawe Phoenix Boat Club
- :Technium
- :Ted Peterson
- :Ted Robbins (football administrator)
- :Ted Rowlands, Baron Rowlands
- :Tegan Nox
- :Tegau Eurfron
- :Tegeingl
- :Tegid Foel
- :Tegryn
- :Tegwared y Bais Wen
- :Tegwen Matthews
- :Teigl Halt railway station
- :Teleri Bevan
- :Teleri Wyn Davies
- :Temperance Town, Cardiff
- :Templeton, Pembrokeshire
- :Tempore
- :Tenby Cottage Hospital
- :Tenby Davies
- :Tenby Town Hall
- :Tenby railway station
- :Tenby transmitting station
- :Tenpin Bowling Association of Wales
- :Terry Gooding
- :Terry Morris (artist and photographer)
- :Terwyn Davies
- :Tesni Murphy
- :Test, Trace, Protect
- :Tewdrig
- :Tewdwr Mawr
- :The 16' Club
- :The Aberdare Leader
- :The Airfield
- :The Angel Hotel, Abergavenny
- :The Angel Hotel, Monmouth
- :The Anglo-Welsh Review
- :The Argoed, Penallt
- :The Artha, Tregare
- :The Ash Grove
- :The Barcud Derwen Group
- :The Bards of Wales
- :The Beauties of England and Wales
- :The Bells of Aberdovey
- :The Bendricks
- :The Big Welsh Bite Food Festival
- :The Bitches
- :The Blue Anchor Inn
- :The Bull Hotel, Llangefni
- :The Bulwarks, Porthkerry
- :The Bush Inn
- :The Call Centre
- :The Captain's Wife
- :The Cardiff Times
- :The Celts (2000 TV series)
- :The Chase, Ross-on-Wye
- :The Church of Jesus Christ of Latter-day Saints in Wales
- :The Cross, Monmouth
- :The Cwm, Llantrisant, Monmouthshire
- :The Cynon Valley Party
- :The Descent from the Cross (David Folley)
- :The Dream of Rhonabwy
- :The Elizabethan Madrigal Singers
- :The Full Ponty
- :The Gaer House
- :The Gate Arts Centre
- :The Gauntlet (novel)
- :The Georgian Group
- :The Gnoll
- :The Gop
- :The Great Deed of Gwilym Bevan
- :The Griffin, Monmouth
- :The Grove, Narberth
- :The Grove (Pembrokeshire hotel)
- :The Havens
- :The Hayes
- :The Herberts
- :The Hobbit's Tale
- :The Hotel Portmeirion
- :The Interns (band)
- :The Joy Formidable
- :The Kardomah Gang
- :The Land (adventure playground)
- :The Leader (Welsh newspaper)
- :The Life Story of David Lloyd George
- :The Light in the Hall
- :The Maelor School
- :The Martini Henry Rifles
- :The Morning Star, Ruthin
- :The Mumbles Lifeboat Station
- :The Mynde (Caerleon)
- :The National (Wales)
- :The Old Cottage, Treadam, Llantilio Crossenny
- :The Old Court House, Ruthin
- :The Old Mill, Ruthin
- :The Old Rectory, Llanbedr
- :The Oval (Llandudno)
- :The Pant, Llanvihangel-Ystern-Llewern
- :The Parlour
- :The Pembrokeshire Murders
- :The Peth
- :The Point, Cardiff
- :The Poppies (Welsh band)
- :The Procurator's House, Magor
- :The Rivers Trust
- :The Rock, Rhosymedre
- :The Rofft
- :The Royal Welch Fusiliers (march)
- :The Saga of Erik the Viking
- :The Secret Room
- :The Skerries, Isle of Anglesey
- :The Skirrid Inn
- :The Three Horseshoes, Monmouth
- :The Tithe Barn, Abergavenny
- :The Tower, Meridian Quay
- :The Tubs
- :The Vine Tree
- :The Walnut Tree (restaurant)
- :The Welsh Boat Race
- :The Welsh Group
- :The Widow (TV series)
- :Theatr Clwyd
- :Theatr Gwaun
- :Theo Wharton
- :Theodore Huckle
- :Theodore Price
- :Theophilus Jones (historian)
- :This Week (newspaper)
- :Thomas Artemus Jones
- :Thomas Barker (painter)
- :Thomas Bartley (footballer)
- :Thomas Benbow Phillips
- :Thomas Bevan (missionary)
- :Thomas Briscoe
- :Thomas Button
- :Thomas Chapman (footballer)
- :Thomas Charles-Edwards
- :Thomas Coke (bishop)
- :Thomas David Frank Evans
- :Thomas Davies (footballer, born 2003)
- :Thomas Davies (physician)
- :Thomas E. Stephens (artist)
- :Thomas Ellis (priest, died 1673)
- :Thomas Ellis (priest, died 1792)
- :Thomas Floyd
- :Thomas Gee
- :Thomas Glyn Watkin
- :Thomas Hanbury-Tracy, 2nd Baron Sudeley
- :Thomas Hancorne (1642 – 1731)
- :Thomas Hancorne (1752–1838)
- :Thomas Henry Blythe
- :Thomas Herbert, 8th Earl of Pembroke
- :Thomas Hill of Dennis
- :Thomas Huet
- :Thomas Hughes Jones
- :Thomas Iorwerth Ellis
- :Thomas John Jones
- :Thomas Johnes (died 1780)
- :Thomas Johns (minister)
- :Thomas Jones (minister)
- :Thomas Jones (priest)
- :Thomas L. Thomas
- :Thomas Levi
- :Thomas Llewellyn Thomas
- :Thomas Mansel, 1st Baron Mansel
- :Thomas Morgan (Afanwyson)
- :Thomas Morgan (navy chaplain)
- :Thomas Nicholas (antiquary)
- :Thomas Owen (priest)
- :Thomas Pardo
- :Thomas Parry (Comptroller of the Household)
- :Thomas Pearson Moody
- :Thomas Powel
- :Thomas Powell (Cardiganshire MP)
- :Thomas Powell (rector of Cantref)
- :Thomas Purnell (critic)
- :Thomas Rees (Congregational minister)
- :Thomas Rees (Twm Carnabwth)
- :Thomas Rhondda Williams
- :Thomas Richard Lloyd
- :Thomas Richards (priest)
- :Thomas Roberts (radical writer)
- :Thomas Scott-Ellis, 8th Baron Howard de Walden
- :Thomas Skevington
- :Thomas Thomas (architect)
- :Thomas Thomas (priest)
- :Thomas Wallensis
- :Thomas Williams Phillips
- :Thomas Young (bishop)
- :Thornhill, Cardiff
- :Thornhill Cemetery and Cardiff Crematorium
- :Thornton, Pembrokeshire
- :Those Damn Crows
- :Three Castles Walk, Monmouthshire
- :Three Cocks
- :Thyrza Anne Leyshon
- :Tich Gwilym
- :Tiers Cross
- :Tiger Bay Brawlers
- :Tiger Bay Warriors
- :Tigertailz
- :Tim Vincent
- :Tinopolis
- :Tintern
- :Tintern Wireworks Branch
- :Tintern railway station
- :Tir Gofal
- :Tollgate House, Mitchel Troy
- :Tom Burns (bishop)
- :Tom Cullen
- :Tom Doran (boxer)
- :Tom Hopkins (rugby league)
- :Tom Lockyer
- :Tom Lucas (trade unionist)
- :Tom Norris (boxer)
- :Tom Pook
- :Tom Rhys Harries
- :Tom Rolt (locomotive)
- :Tom Walley
- :Tom Ward
- :Tom Williams (rugby union, born 1887)
- :Tom Worthington (footballer)
- :Tomen y Mur
- :Tomen yr Allt
- :Tommy Bamford
- :Tommy David
- :Tommy Davies
- :Tommy Farr
- :Ton Farmhouse, Llangybi
- :Tondu railway station
- :Tonfanau railway station
- :Tongwynlais
- :Tongwynlais railway station
- :Tonna, Neath
- :Tonna Hospital
- :Tonna RFC
- :Tonteg
- :Tonteg Halt railway station
- :Tony Bianchi
- :Tony Charles
- :Tony Etoria
- :Tony James (Welsh footballer, born 1978)
- :Tony Jewell (doctor)
- :Tony Lewis
- :Tony Roberts (footballer)
- :Tonyrefail
- :Tonyrefail East
- :Torch Theatre, Milford Haven
- :Torchwood (audio drama series)
- :Torfaen (UK Parliament constituency)
- :Torfaen Museum
- :Torfaen Tigers
- :Torpantau railway station
- :Tour de Gwent
- :Town, Merthyr Tydfil
- :Town Farm, Grosmont
- :Trade Centre Group
- :Trade Union (Wales) Act 2017
- :Traeth Bychan
- :Traeth Mawr
- :Traeth Mawr Loop
- :Trahaearn ap Caradog
- :Transport for Wales
- :Transport for Wales Rail
- :TrawsCambria
- :Trawscoed fort
- :Trawscoed railway station
- :Trawsfynydd
- :Trawsgoed
- :Tre'r Ceiri
- :Tre-Taliesin
- :Treachery of the Blue Books
- :Trearddur
- :Treaty of Aberconwy
- :Treaty of Gwerneigron
- :Trebanog
- :Trebanos
- :Treberfydd
- :Treborth Botanic Garden
- :Treborth railway station
- :Trecwn
- :Trecynon
- :Tredean House, Devauden
- :Tredegar General Hospital
- :Tredegar House
- :Tredegar Iron and Coal Company
- :Tredegar Park and Marshfield
- :Tredegar Town Band
- :Tredegar Town Hall
- :Tredegar railway station
- :Tredunnock
- :Tref Alaw
- :Trefasser
- :Trefeca
- :Trefelin B.G.C.
- :Treffgarne
- :Treffgarne Bridge Quarry
- :Treffgarne Hall
- :Trefignath
- :Trefil
- :Trefin
- :Trefor Quarry railway
- :Trefor Richard Morgan
- :Treforest Estate railway station
- :Treforest railway station
- :Trefriw Woollen Mills
- :Tregaron Hospital
- :Tregaron railway station
- :Tregarth
- :Tregeiriog
- :Tregeiriog House, Llanishen, Monmouthshire
- :Tregrug Castle
- :Tregyb Woodlands
- :Tregynon
- :Trehafod
- :Treherbert RLFC
- :Treherbert railway station
- :Trellech United
- :Trelleck Grange
- :Trelystan
- :Tremadog Town Hall
- :Tremeirchion
- :Treorchy Male Choir
- :Treorchy RFC
- :Treorchy railway station
- :Trerhyngyll and Maendy Halt railway station
- :Tresaith
- :Trethomas
- :Trevelin
- :Trevethin Community School
- :Trevil Halt railway station
- :Trevor, Wrexham
- :Trevor Boyns
- :Trevor Brewer
- :Trevor Evans (journalist)
- :Trevor Fishlock
- :Trevor Hall, Denbighshire
- :Trevor Jones (Welsh footballer)
- :Trevor Lawless
- :Trevor Llewellyn
- :Trewent Point
- :Trewern Hall
- :Trewern United F.C.
- :Treworgan Manor, Llansoy
- :Trewyn Farm barn, Llanvihangel Crucorney
- :Trewyn House
- :Trichrug
- :Tricky Nixon
- :Trimsaran
- :Trinity University College
- :Trip Hazard: My Great British Adventure
- :Trivor Farmhouse, St Maughans
- :Troed-y-rhiw
- :Trostrey
- :Trostrey Court
- :Trust PA
- :Trwyn Du Lighthouse
- :Tryfan Junction railway station
- :Trystan Gravelle
- :Trystan Owain Hughes
- :Tsunami Relief Cardiff
- :Tudno (electoral ward)
- :Tudno FM
- :Tudor Court, Penley
- :Tudor Edwards
- :Tudor Merchant's House
- :Tudor Trader House
- :Tudor poor laws
- :Tudur ap Goronwy
- :Tudweiliog
- :Tufton, Pembrokeshire
- :Tumble, Carmarthenshire
- :Tumuli Shroomaroom
- :Turf Hotel
- :Turner House Gallery
- :Twm Siôn Cati
- :Twm o'r Nant
- :Twmbarlwm
- :Twrch Trwyth
- :Twthill, Rhuddlan
- :Twyn Community Centre
- :Ty'n-y-bryn quarry
- :Ty-Cooke Farmhouse, Mamhilad
- :Ty-Hwnt-y-Bwlch Farmhouse, Cwmyoy
- :Ty-asch, Mamhilad
- :Ty-mawr Farmhouse, Cwmyoy
- :Ty-uchaf Farmhouse, Llanelly
- :Ty Bronna
- :Ty Coch Cruck Barn, Llangynhafal, Denbighshire
- :Ty Gwyn, Lisvane
- :Ty Mawr Reservoir
- :Tycroes
- :Tyisha
- :Tylorstown
- :Tylwyth Teg
- :Tynewydd, Rhondda Cynon Taf
- :Tynged yr Iaith
- :Tyrone Maullin
- :Tyrone O'Sullivan
- :Tyrrau Mawr
- :Tysilio
- :Tythegston
- :Tywyn
- :Tywyn Hospital
- :Tŷ Canol Wood
- :Tŷ Croes railway station
- :Tŷ Mawr, Castle Caereinion
- :Tŷ Mawr, Dingestow
- :Tŷ Mawr Wybrnant
- :Tŷ Newydd
- :Tŷ Newydd Burial Chamber
- :Tŷ unnos
- :Uhtred (bishop of Llandaff)
- :Ultra (personal rapid transit)
- :Un Nos Ola Leuad
- :Under Milk Wood
- :Under Milk Wood (2015 film)
- :Under the Driftwood Tree
- :Under the Thatch
- :Uned 5
- :Union School of Theology
- :Union dividend
- :Union of Welsh Independents
- :Universal Colliery
- :Universities' Police Science Institute
- :University of Wales, Newport
- :University of Wales Institute of Science and Technology
- :Untitled (Evans)
- :Upper Boat
- :Upper Boat Halt railway station
- :Upper Boat railway station
- :Upper Corris Tramway
- :Upper Dyffryn House, Grosmont
- :Upper Green, Llantilio Crossenny
- :Upper Pengelli, Kerry (Montgomeryshire)
- :Upper Pontnewydd railway station
- :Upper Red House, Llanvihangel-Ystern-Llewern
- :Upper Tal-y-fan, Dingestow
- :Upper White Castle Farmhouse
- :Upper Wye Gorge
- :Upton, Pembrokeshire
- :Upton Castle
- :Urien Yrechwydd
- :Ursula Masson
- :Usk Bridge (Brecon)
- :Usk Bridge (Usk)
- :Usk Railway Bridge
- :Usk Valley Walk
- :Usk railway station (Great Western Railway)
- :Uskmouth power stations
- :Uvedale Corbett Junior
- :Uzmaston
- :Uzmaston, Boulston and Slebech
- :Uí Ímair
- :Vaendre Hall
- :Vale Vikings
- :Vale of Clwyd
- :Vale of Clwyd Railway
- :Vale of Glamorgan Borough Council
- :Vale of Glamorgan Line
- :Vale of Glamorgan Railway
- :Valentine Morris
- :Valerie Randle
- :Valle Crucis Abbey
- :Valley Cougars
- :Valley Greyhound Stadium
- :Valley Lines (train operating company)
- :Valley Wetlands
- :Valley railway station
- :Valor Ecclesiasticus
- :Valuation Tribunal for Wales
- :Varteg railway station
- :Vates
- :Vaughan Gething
- :Vaux Passional
- :Vaynor
- :Venue Cymru
- :Vernon Watkins
- :Veronica German
- :Very Annie Mary
- :Vetch Field
- :Vian Bakir
- :Vicki Thomas
- :Victim Support
- :Victoria Gardens, Neath
- :Victoria Memorial Hospital
- :Victoria Park, Cardiff
- :Vikki Howells
- :Vincent Evans (artist)
- :Violet Alford
- :Viral Landscapes
- :Virginia Park (Caerphilly)
- :Viv Woodward (Welsh footballer)
- :Viva Machine
- :Vivian & Sons
- :Vivian Jenkins
- :Vivian Naylor-Leyland
- :Vivian family (baronets and barons)
- :Votty & Bowydd quarry
- :W. R. P. George
- :W. S. Gwynn Williams
- :WPA World Nine-ball Championship
- :WRU Challenge Cup
- :WRU Division Three North
- :WRU Division Three West A
- :Waenavon railway station
- :Wakestock (Wales)
- :Waking the Dragon
- :Wales & Borders franchise
- :Wales (European Parliament constituency)
- :Wales (magazine)
- :Wales Air Ambulance
- :Wales Arts Review
- :Wales Autism Research Centre
- :Wales Centre for Public Policy
- :Wales Co-operative Centre
- :Wales Genocide Memorial
- :Wales Governance Centre
- :Wales Institute for Research in Art and Design
- :Wales Interpretation and Translation Service
- :Wales National County Cricket Club
- :Wales University Officers' Training Corps
- :Wales Way
- :Wales West and North Television
- :Wales at Six
- :Wales at the 1930 British Empire Games
- :Wales at the 1934 British Empire Games
- :Wales at the 1958 British Empire and Commonwealth Games
- :Wales at the 1962 British Empire and Commonwealth Games
- :Wales at the 2002 Commonwealth Games
- :Wales at the 2006 Commonwealth Games
- :Wales at the 2010 Commonwealth Games
- :Wales at the 2014 Commonwealth Games
- :Wales at the 2018 Commonwealth Games
- :Wales at the 2022 Commonwealth Games
- :Wales at the Commonwealth Games
- :Wales at the FIFA World Cup
- :Wales bucket hat
- :Wales in the Junior Eurovision Song Contest
- :Wales in the Junior Eurovision Song Contest 2018
- :Wales in the Junior Eurovision Song Contest 2019
- :Wales men's national basketball team
- :Wales national under-18 football team
- :Wales national under-20 rugby union team
- :Wales women's national rugby league team
- :Wallace Building, Swansea
- :Walley Barnes
- :Wallis Thomas
- :Walnut Tree Viaduct
- :Walter E. Rees
- :Walter Evans (footballer, born 1867)
- :Walter Jenkin Evans
- :Walter Jenkins (civil servant)
- :Walter Map
- :Walter Overbury
- :Walter Rice (MP)
- :Walter Rice Evans
- :Walter Robbins
- :Walter T. Griffiths
- :Walter of Hereford
- :Walton East
- :Walwyn's Castle
- :Warren, Pembrokeshire
- :Wartski
- :Watcyn Samuel Jones
- :Waterfall railway station (Snowdon Mountain Railway)
- :Waterfront, Swansea
- :Waterston
- :Watkin George
- :Watkin Hezekiah Williams
- :Watkin Roberts
- :Wattstown
- :Wattsville
- :Waun Fach
- :Waun Rydd
- :Waunfawr railway station
- :Wawffactor
- :Wayne David
- :Wayne Ellis
- :We'll Keep a Welcome
- :We'll Keep a Welcome (album)
- :We All Had Doctors' Papers
- :Wedding dress of Princess Charlotte of Wales
- :Wedi 7
- :Weekend (Welsh band)
- :Welsh (Plural)
- :Welsh 0-6-2T locomotives
- :Welsh Amateur Championship (snooker)
- :Welsh Australian Rules Football League
- :Welsh Basin
- :Welsh Black cattle
- :Welsh Championships
- :Welsh Church (Amendment) Act 1938
- :Welsh Church (Burial Grounds) Act 1945
- :Welsh Church of Central London
- :Welsh Covered Court Championships
- :Welsh Football League Cup
- :Welsh Greyhound Derby
- :Welsh Harlequin
- :Welsh Highland Heritage Railway
- :Welsh International
- :Welsh Italians
- :Welsh Labour Students
- :Welsh Language Music Day
- :Welsh Liberal Democrats inaugural Assembly group election
- :Welsh Liberal Party
- :Welsh Local Government Association
- :Welsh Manuscripts Society
- :Welsh National Gymanfa Ganu Association
- :Welsh National and Universal Mining Disaster Memorial Garden
- :Welsh Poetry Competition
- :Welsh Premier Division
- :Welsh Presbyterian Church (Los Angeles)
- :Welsh Rates of Income Tax
- :Welsh Republican Movement
- :Welsh Rowing
- :Welsh Rugby Players Association
- :Welsh Sea Rowing Association
- :Welsh Seal
- :Welsh Singers Competition
- :Welsh St Donats
- :Welsh Terrier
- :Welsh Theatre Company
- :Welsh Tract
- :Welsh Triathlon
- :Welsh Varsity
- :Welsh Wig
- :Welsh Wildlife Centre
- :Welsh apples
- :Welsh artefacts in museums outside Wales
- :Welsh bow
- :Welsh dresser
- :Welsh fiscal balance
- :Welsh handball
- :Welsh hip hop
- :Welsh regional rugby
- :Welsh units
- :Welshampton rail crash
- :Welshpool Town Hall
- :Welshpool railway station
- :Wenallt Hill
- :Wendy Mulford
- :Wentnor Group
- :Wentwood
- :Wenvoe
- :Wenvoe Castle
- :Wenvoe Tunnel
- :Wenvoe transmitting station
- :Wern-ddu Farmhouse, Llantilio Pertholey
- :Wern Ddu Claypits
- :Wernffrwd
- :West Cross
- :West End (Caldicot ward)
- :West Grove, Cardiff
- :West Hockey Association
- :West Monmouthshire (UK Parliament constituency)
- :West Tarr Mediaeval House
- :West Usk Lighthouse
- :West Wales Parkway railway station
- :West Wales Raiders
- :Western Miners' Association
- :Western Welsh
- :Wheatsheaf Junction
- :Whistle Inn Halt railway station
- :Whitchurch, Pembrokeshire
- :Whitchurch High School
- :Whitchurch Hospital
- :Whitchurch railway station (Wales)
- :White Book of Rhydderch
- :White City Stadium, Cardiff
- :White Hart Inn, Llangybi
- :White dragon
- :Whitebrook
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- :Whiteford Sands
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- :Whitland railway station
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- :Wilfred Risdon
- :WillGriff John
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- :Will Joseph (rugby union, born 1877)
- :William A. Jones (politician)
- :William Addams Williams
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- :William Aubrey
- :William Bassett (died 1586)
- :William Bevan (priest)
- :William Boyd Dawkins
- :William Brace
- :William David Davies
- :William Davies (footballer, born 1854)
- :William Davies Thomas
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- :William Edwards (school inspector)
- :William Erbery
- :William Evans (Wil Ifan)
- :William Evans (cardiologist)
- :William Evans (footballer)
- :William Evans (rugby union, born 1892)
- :William Foxwist
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- :William McConnel
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- :William Morgan (of Machen and Tredegar)
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- :William Rees (priest and writer)
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- :William Roberts (footballer, born 1863)
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- :2018–19 Welsh Premier Women's League
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- :A4050 road
- :Aaron Amadi-Holloway
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- :Alison Halford
- :Alun Davies (politician)
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- :Angharad Golden-Hand
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- :Annes Elwy
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- :Arthur Henderson, Baron Rowley
- :Arthur Jenkins (British politician)
- :Barry Jones, Baron Jones
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- :Bwlch Penbarras
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- :Ceryl Tindall-Jones
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- :Co-operation between the Green Party and Plaid Cymru
- :Cymreigyddion y Fenni
- :Daniel Hopkin
- :David Grenfell
- :David Hanson, Baron Hanson of Flint
- :David Morris (Labour politician)
- :David Mort
- :David Rees (politician)
- :David Williams (Swansea East MP)
- :Dean Reynolds (darts player)
- :Debbie Wilcox, Baroness Wilcox of Newport
- :Denzil Davies
- :Dominic Dale
- :Don Touhig
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- :Dorothy Rees
- :Eddie Butler (rugby union)
- :Edmund Stonelake
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- :Eirene White, Baroness White
- :Elystan Morgan
- :Emrys Hughes
- :Eric Ramsay (football manager)
- :Fforest Fach
- :Frank Soskice
- :Frederic Morgan, 5th Baron Tredegar
- :Gainor Hughes
- :Gareth Thomas (Welsh politician)
- :Gareth Wardell
- :George Hall, 1st Viscount Hall
- :Goronwy Rees
- :Goronwy Roberts, Baron Goronwy-Roberts
- :Granville West, Baron Granville-West
- :Green Gartside
- :Gruffydd Aled Williams
- :Gwenda Thomas
- :Gwilym Prichard
- :Gwilym Prys Davies, Baron Prys-Davies
- :Gwynoro Jones
- :Hefin David
- :Hilary Marquand
- :Horace Mayhew
- :Huw T. Edwards
- :Ifor Davies
- :Ivor Gwynne
- :Jamie Clarke (snooker player)
- :Jane Davidson
- :Jeff Jones (Welsh politician)
- :Jeffrey Thomas (politician)
- :Jessica Morden
- :John Jones Maesygarnedd
- :John Metcalf (composer)
- :John Smith (Welsh politician)
- :John Williams (Gower MP)
- :Jon Owen Jones
- :Joyce Daniel
- :Joyce Watson
- :Julie James
- :Kanishka Narayan
- :Karen Sinclair
- :Kathy Pearce
- :Kirsti Bohata
- :Lesley Griffiths
- :Lewis Jones (rugby, born 1931)
- :Lost Boys and Fairies
- :Ludovic Lloyd
- :Lynne Neagle
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- :Mark Taubert
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- :Morgan Phillips
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- :Non Parry
- :Ochr 1
- :Owen John Thomas
- :Pontypridd F.C.
- :Richard Gwent
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- :Roger Thomas (British politician)
- :Roy Hughes, Baron Islwyn
- :Saint Gelert
- :Sam Parker (Welsh footballer)
- :Sandy Mewies
- :Shash Appan
- :Siân James (politician)
- :St Catherine's Church, Canton
- :St David's Church, Nottage
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- :St Mary's Church, Aberavon
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- :Swansea Cork Ferries
- :Swansea University RFC
- :TSS Cambria (1920)
- :The Sun Also Rises (duo)
- :Thomas Griffiths (politician)
- :Tomen y Rhodwydd
- :Tripartite Indenture
- :Trydan Gwyrdd Cymru
- :Tudor Watkins, Baron Watkins
- :Val Feld
- :Walter Lewis (trade unionist)
- :Will Owen (politician)
- :Wrexham, Shropshire & Midlands Railway
- :Wynnstay Arms Hotel, Ruabon
- :Y Beibl cyssegr-lan
- :Yws Gwynedd
- :Zonia Bowen
Stub-Class
- :Amgueddfa Cymru – Museum Wales
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- :Chris Freeman (scientist)
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- :D. J. Williams (politician)
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- :Dogfeiling
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- :East Wales
- :Ebbw River
- :Edwin Seward
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- :Encyclopaedia of Wales
- :Erb of Gwent
- :Evan Rees (Dyfed)
- :First Jones government
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- :General Teaching Council for Wales
- :Geraint Thomas National Velodrome
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- :Gwalia
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- :Hendregadredd Manuscript
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- :John Davies (historian)
- :John Graham Chambers
- :John Walter Jones (Wales)
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- :Johnny Williams (boxer)
- :Jonathan Williams (priest)
- :Justices Protection Act 1848
- :Kathrin Thomas
- :Lady Windsor Colliery
- :Lewis Davies
- :Llangollen and Corwen Railway
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- :Lleucu Roberts
- :Llywelyn ap Merfyn
- :Maes-e
- :Mark Isherwood (politician)
- :Meic Stevens
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- :National Cycle Museum
- :National Poet of Wales
- :Newcastle Higher
- :Newchurch, Monmouthshire
- :Nic Parry
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- :North West Wales
- :Noson lawen
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- :Palace Theatre, Swansea
- :Pant-y-Goitre Bridge
- :Penmaenpool
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- :Planning (Listed Buildings and Conservation Areas) Act 1990
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- :Public Services Ombudsman (Wales) Act 2005
- :RAF Haverfordwest
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- :RNAS Dale (HMS Goldcrest)
- :Race the Train
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- :Redundancy in United Kingdom law
- :Registered Intermediary
- :Results of the 2021 Senedd election
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- :Schools Sites Act 1841
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- :Welsh chronicles
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- :Yny lhyvyr hwnn
- :.wales
- :11th century in Wales
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- :1722 in Wales
- :1854 Cardiganshire by-election
- :1870 Merionethshire by-election
- :1877–78 Welsh Cup
- :1878 Welsh Cup final
- :1879 Welsh Cup final
- :1880 Caernarvonshire by-election
- :1880 Radnor Boroughs by-election
- :1881 Welsh Cup final
- :1882 Caernarvon Boroughs by-election
- :1882 Carmarthen Boroughs by-election
- :1882–83 Welsh Cup
- :1883–84 Welsh Cup
- :1884 Radnor Boroughs by-election
- :1884–85 Welsh Cup
- :1885 Denbighshire by-election
- :1885–86 Welsh Cup
- :1886 Flintshire by-election
- :1886–87 Welsh Cup
- :1887–88 Welsh Cup
- :1888–89 Welsh Cup
- :1889 Montgomeryshire County Council election
- :1889 Swansea County Borough Council election
- :1889 Welsh Cup final
- :1890 Swansea County Borough Council election
- :1890–91 Welsh Amateur Cup
- :1891 Swansea County Borough Council election
- :1891–92 Welsh Amateur Cup
- :1892 Pembrokeshire County Council election
- :1892–93 Welsh Amateur Cup
- :1893 Swansea District by-election
- :1893–94 Welsh Amateur Cup
- :1894 Llandeilo Rural District Council election
- :1894 Ogmore and Garw Urban District Council election
- :1894–95 Welsh Amateur Cup
- :1895–96 North Wales Coast League
- :1895–96 Welsh Amateur Cup
- :1896 Aberdare Urban District Council election
- :1896–97 Welsh Amateur Cup
- :1897 East Denbighshire by-election
- :1897–98 Welsh Amateur Cup
- :1898 Pembrokeshire by-election
- :1898–99 Welsh Amateur Cup
- :1899 Aberdare Urban District Council election
- :1899 Merionethshire by-election
- :1899–1900 Welsh Amateur Cup
- :1900 Aberdare Urban District Council election
- :1900–01 Welsh Amateur Cup
- :1901 Aberdare Urban District Council election
- :1901 Llandeilo Rural District Council election
- :1901–02 Welsh Amateur Cup
- :1902 Aberdare Urban District Council election
- :1902–03 Welsh Amateur Cup
- :1903 Aberdare Urban District Council election
- :1903–04 Welsh Amateur Cup
- :1904 Carmarthen Rural District Council election
- :1904 Llandeilo Rural District Council election
- :1904 Pembrokeshire County Council election
- :1904–05 Welsh Amateur Cup
- :1905–06 Welsh Amateur Cup
- :1906–07 Welsh Amateur Cup
- :1907 Llandeilo Rural District Council election
- :1909–10 Welsh Amateur Cup
- :1910 Llandeilo Rural District Council election
- :1910–11 Welsh Amateur Cup
- :1913 Carmarthen Rural District Council election
- :1913 Llandeilo Rural District Council election
- :1913–14 Welsh Amateur Cup
- :1915 Carmarthen Boroughs by-election
- :1919 Llandeilo Rural District Council election
- :1919–20 Welsh Amateur Cup
- :1933–34 Cardiff City F.C. season
- :1934–35 Cardiff City F.C. season
- :1946 Ogmore by-election
- :1966–67 Cardiff City F.C. season
- :1971–72 Newport County A.F.C. season
- :1973 Japan rugby union tour of Wales, England and France
- :1974 New Zealand rugby union tour of Ireland, Wales and England
- :1975 Wales rugby union tour of Asia
- :1976 Dinefwr Borough Council election
- :1978 Wales rugby union tour of Australia
- :1979 Canada rugby union tour of England, Wales and France
- :1982 Welsh Professional Championship
- :1982–83 Cardiff City F.C. season
- :1983 Dinefwr Borough Council election
- :1983 Llanelli Borough Council election
- :1983 Welsh Professional Championship
- :1983–84 Newport County A.F.C. season
- :1984 Llŷn Peninsula earthquake
- :1984–85 Cardiff City F.C. season
- :1984–85 Newport County A.F.C. season
- :1985 Mid Glamorgan County Council election
- :1985 Pontins Professional
- :1985 South Glamorgan County Council election
- :1985–86 Newport County A.F.C. season
- :1985–86 Welsh Alliance League
- :1986 Wales rugby union tour of the South Pacific
- :1986 Welsh Professional Championship
- :1986–87 Welsh Alliance League
- :1986–87 Welsh Cup
- :1987 United States rugby union tour of Wales
- :1987 Welsh Professional Championship
- :1987–88 Welsh Alliance League
- :1988 Welsh Professional Championship
- :1988–89 Welsh Alliance League
- :1988–89 Welsh Cup
- :1989 New Zealand rugby union tour of Canada and the British Isles
- :1989 South Glamorgan County Council election
- :1989 Welsh Professional Championship
- :1989–90 Welsh Alliance League
- :1989–90 Welsh Cup
- :1990 Welsh Professional Championship
- :1990–91 Welsh Alliance League
- :1990–91 Welsh Cup
- :1991 Welsh Professional Championship
- :1991–92 Welsh Alliance League
- :1992–93 Welsh Alliance League
- :1993 Japan rugby union tour of Wales
- :1993 Wales rugby union tour of Zimbabwe and Namibia
- :1993–94 League of Wales
- :1993–94 Welsh Alliance League
- :1994 Wales rugby union tour of Canada and Oceania
- :1994–95 League of Wales
- :1994–95 Welsh Alliance League
- :1995 Bridgend County Borough Council election
- :1995 City and County of Swansea Council election
- :1995 Fiji rugby union tour of Wales and Ireland
- :1995–96 League of Wales
- :1995–96 Welsh Alliance League
- :1996 Rover British Clay Court Championships
- :1996–97 Cardiff City F.C. season
- :1996–97 League of Wales
- :1996–97 Welsh Alliance League
- :1997 Welsh International Open – Doubles
- :1997 Welsh International Open – Singles
- :1997 Welsh Open (snooker)
- :1997–98 FAW Premier Cup
- :1997–98 FAW Premier Cup group stage
- :1997–98 League of Wales
- :1998 Wales rugby union tour of Africa
- :1998–99 League of Wales
- :1999 United States rugby union tour of Australia and Great Britain
- :1999 Welsh Open (snooker)
- :1999–2000 League of Wales
- :1999–2000 Welsh Alliance League
- :1 and 2 Tai Cochion
- :2000 Welsh Open (snooker)
- :2000–01 League of Wales
- :2000–01 Welsh Alliance League
- :2001 Wales rugby union tour of Japan
- :2001–02 League of Wales
- :2001–02 Welsh Alliance League
- :2002 New Zealand rugby union tour of Europe
- :2002–03 Welsh Alliance League
- :2002–03 Welsh Premier League
- :2002–03 in Welsh football
- :2003 Wales rugby union tour of Australia and New Zealand
- :2003–04 Welsh Alliance League
- :2003–04 Welsh Premier League
- :2004 Isle of Anglesey County Council election
- :2004–05 Welsh Alliance League
- :2004–05 Welsh League Cup
- :2004–05 Welsh Premier League
- :2004–05 in Welsh football
- :2005 Wales Rally GB
- :2005 Wales rugby union tour of North America
- :2005–06 Swansea City A.F.C. season
- :2005–06 Welsh Alliance League
- :2005–06 Welsh League Cup
- :2005–06 Welsh Premier League
- :2005–06 in Welsh football
- :2006–07 Welsh Premier League
- :2006–07 in Welsh football
- :2007–08 Welsh League Cup
- :2008 Isle of Anglesey County Council election
- :2008–09 Welsh National League (Wrexham Area)
- :2008–09 in Welsh football
- :2009–10 Welsh Cup
- :2009–10 Welsh League Cup
- :2009–10 in Welsh football
- :2010 Speedway Grand Prix of Great Britain
- :2010 United Kingdom general election in Wales
- :2010–11 Welsh Football League Division Three
- :2010–11 Welsh Football League Division Two
- :2010–11 Welsh League Cup
- :2010–11 Welsh Premier Women's League
- :2010–11 in Welsh football
- :2011–12 Newport County A.F.C. season
- :2011–12 in Welsh football
- :2012 Autumn International Series
- :2012 Blaenau Gwent County Borough Council election
- :2012 Bridgend County Borough Council election
- :2012 Caerphilly County Borough Council election
- :2012 Flintshire County Council election
- :2012 Gwynedd Council election
- :2012 Merthyr Tydfil County Borough Council election
- :2012 Monmouthshire County Council election
- :2012 Rhondda Cynon Taf County Borough Council election
- :2012 Torfaen County Borough Council election
- :2012 Vale of Glamorgan Council election
- :2012 Wales Rally GB
- :2012 Wrexham County Borough Council election
- :2012–13 Newport County A.F.C. season
- :2013 Conference Premier play-off final
- :2013 Rugby League World Cup Group D
- :2013 Wales Rally GB
- :2013–14 FA Vase
- :2013–14 Welsh Football League Division One
- :2014–15 Newport County A.F.C. season
- :2014–15 Scarlets season
- :2014–15 Welsh Cup
- :2015–16 Welsh Cup
- :2015–16 Welsh Football League Division One
- :2016 Wales Rally GB
- :2016–17 Welsh Football League Division Two
- :2017 Carmarthenshire County Council election
- :2017 Conwy County Borough Council election
- :2017 Flintshire County Council election
- :2017 Monmouthshire County Council election
- :2017 Pembrokeshire County Council election
- :2017 Powys County Council election
- :2017 Vale of Glamorgan Council election
- :2017 in Wales
- :2017–18 Cymru Alliance
- :2018 Welsh Open (snooker)
- :2018 Women's Six Nations Championship
- :2018 in Wales
- :2018–19 Cymru Alliance
- :2020–21 Ardal NE
- :2020–21 Ardal NW
- :2020–21 Ardal SE
- :2020–21 Ardal SW
- :2020–21 Cymru South
- :2021 Welsh Conservatives leadership election
- :2021–22 Cymru Premier
- :2021–22 Cymru South
- :2021–22 Indigo Group Premiership
- :2021–22 WRU Championship
- :2022 Flintshire County Council election
- :2022–23 Wrexham A.F.C. season
- :2023 British Cycling National Track Championships
- :2023–24 Adran Premier
- :2023–24 Adran Trophy
- :216 Cardiff–Bristol Airport
- :3SL
- :9Bach
- :A4055 road
- :A4109 road
- :A4113 road
- :A4136 road
- :A4234 road
- :A468 road
- :A469 road
- :A476 road
- :A478 road
- :A486 road
- :A489 road
- :A490 road
- :A499 road
- :A541 road
- :A Tour in Scotland, 1769
- :Aaron Aby
- :Aaron James (English footballer)
- :Aaron Shingler
- :Abbas Farid
- :Abbeycwmhir
- :Abel Hayes
- :Abel Hughes
- :Aber, Ceredigion
- :Aber-arad
- :Aber-giar
- :Aber Alaw
- :Aber Bargoed railway station
- :Aber Dinlle Fault
- :Aber Mawr Formation
- :Aber Swing Bridge
- :Aber Valley
- :Aber Valley F.C.
- :Aber Village
- :Aberaeron F.C.
- :Aberaeron Hospital
- :Aberaeron Urban District
- :Aberafan Centre
- :Aberafan Maesteg (UK Parliament constituency)
- :Aberaman (electoral ward)
- :Aberaman railway station
- :Aberangell
- :Aberarth
- :Aberarth – Carreg Wylan
- :Aberavon Seaside railway station
- :Aberavon Town railway station
- :Aberayron railway station
- :Aberbanc
- :Aberbargoed Hospital
- :Aberbechan
- :Aberbeeg railway station
- :Aberbowlan
- :Aberbran railway station
- :Aberbrân
- :Abercamlais railway station
- :Abercanaid railway station
- :Abercarn RFC
- :Abercarn United A.F.C.
- :Abercegir
- :Abercrave railway station
- :Abercriban Quarries
- :Abercrychan
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- :Abercwmboi RFC
- :Abercynon North railway station
- :Abercynon RFC
- :Aberdare Golf Club
- :Aberdare High School
- :Aberdare Low Level railway station
- :Aberdare Park
- :Aberdare Town F.C.
- :Aberderfyn Halt railway station
- :Aberdesach
- :Aberdylais Halt railway station
- :Aberedw
- :Aberedw railway station
- :Abererch
- :Aberfan railway station
- :Aberffraw (cantref)
- :Aberffrwd, Ceredigion
- :Aberffrwd, Monmouthshire
- :Aberffrwd railway station
- :Abergarw
- :Abergarwed
- :Abergavenny fireworks display
- :Abergeirw
- :Abergorlech
- :Abergwesyn
- :Abergwili (electoral ward)
- :Abergwili railway station
- :Abergwydol
- :Abergwynfi
- :Abergwynfi railway station
- :Aberhafesp
- :Aberhosan
- :Abermagwr
- :Abermenai Point
- :Abermeurig
- :Abermule
- :Abermule A.F.C.
- :Abermule with Llandyssil
- :Abernant, Carmarthenshire
- :Abernant, Powys
- :Abernant railway station
- :Aberoer
- :Aberpergwm
- :Abersoch Golf Club
- :Abersychan Low Level railway station
- :Abersychan School
- :Abertafol railway station
- :Aberthaw High Level railway station
- :Aberthaw Low Level railway station
- :Aberthin Platform railway station
- :Abertillery Learning Community
- :Abertillery and District Hospital
- :Abertridwr, Caerphilly
- :Abertridwr, Powys
- :Abertridwr railway station
- :Abertrinant
- :Abertysswg railway station
- :Aberwheeler
- :Aberyscir
- :Aberystwyth League
- :Aberystwyth Rural District
- :Aberystwyth Times
- :Aberystwyth University Ceramics Collection
- :Aberystwyth University F.C.
- :Abraham (Bishop of St Davids)
- :Acrefair
- :Acrefair railway station
- :Active Travel (Wales) Act 2013
- :Adam Buick
- :Adam Jones (referee)
- :Adam Lively
- :Adam Ottley
- :Adam Street railway station
- :Adam Thomas (rugby union)
- :Adam the Welshman
- :Adamsdown Primary School
- :Adda Fras
- :Addysgydd
- :Adfa, Powys
- :Admiral Rodney's Pillar
- :Adpar
- :Adrian Meikle
- :Adwen
- :Aergol Lawhir
- :Aethwy Rural District
- :Afallach
- :Afon Aber
- :Afon Alaw
- :Afon Alun
- :Afon Angell
- :Afon Annell
- :Afon Brân
- :Afon Cadnant
- :Afon Cefni
- :Afon Cegin
- :Afon Ceirig
- :Afon Cerist
- :Afon Cilieni
- :Afon Colwyn
- :Afon Crai
- :Afon Crawnon
- :Afon Cwmnantcol
- :Afon Cynrig
- :Afon Ddu
- :Afon Deri
- :Afon Dringarth
- :Afon Dulas
- :Afon Dulyn
- :Afon Dyffryn Gwyn
- :Afon Eden
- :Afon Eigiau
- :Afon Elan
- :Afon Erch
- :Afon Ffinnant Formation
- :Afon Ffraw
- :Afon Gwili (Loughor)
- :Afon Gwydderig
- :Afon Gwyrfai
- :Afon Hydfer
- :Afon Iwrch
- :Afon Leri
- :Afon Llafar
- :Afon Llafar (Dee)
- :Afon Lledr
- :Afon Llia
- :Afon Lloer
- :Afon Llyfni
- :Afon Llynfi (Wye)
- :Afon Marlais, Carmarthenshire
- :Afon Marlas
- :Afon Marteg
- :Afon Meillionen
- :Afon Melynllyn
- :Afon Merddwr
- :Afon Morlais
- :Afon Mynach
- :Afon Porth-llwyd
- :Afon Pyrddin
- :Afon Rhythallt
- :Afon Roe
- :Afon Seiont
- :Afon Senni
- :Afon Soch
- :Afon Tafolog
- :Afon Tarell
- :Afon Twrch, Carmarthenshire
- :Afon Twymyn
- :Afon Wyre
- :Afon Ysgethin
- :Afon Ysgir
- :Afon y Maes
- :Afonwen
- :Agricultural Advisory Panel for Wales
- :Agricultural Land Classification
- :Aileen Richards
- :Aithnen
- :Alabum
- :Alan Alan
- :Alan Edmunds
- :Alan Edwards (rugby)
- :Alan Jarvis
- :Alan Jevons
- :Alan Jones (footballer, born 1939)
- :Alan Reynolds (rugby union)
- :Alan Simons
- :Alan Williams (Carmarthen MP)
- :Alasdair Whittle
- :Alban Thomas
- :Albert Freethy
- :Albert Gladstone
- :Albert Gower-Rees
- :Albert Hawkins
- :Albert Jones (footballer, born 1883)
- :Albert Lewis (priest)
- :Albert Lockley
- :Albert Love
- :Albert Parry
- :Albert Pryce-Jones
- :Albert Thomas Davies
- :Albert Wardell
- :Albert Young (footballer)
- :Alberta Place Halt railway station
- :Albion Rovers F.C. (Newport)
- :Aldred Williams
- :Aled Gravelle
- :Aled Hall
- :Aled Owen
- :Aled Wyn Davies
- :Alex Cuthbert
- :Alex Finlayson (rugby union)
- :Alex Givvons
- :Alex Gough (squash player)
- :Alex Jones (rugby league)
- :Alex Mann (rugby union)
- :Alexander Griffith
- :Alexander Hunter (footballer)
- :Alf Davies
- :Alfred Ernest Watkins
- :Alfred Francis
- :Alfred Lewis Jones
- :Alfred Oliver
- :Alfred Owen Davies
- :Alfred Townsend
- :Algy Thomas
- :Ali Loke
- :Alice Springs Golf Club
- :Alis Wen
- :All Nations Centre
- :All Under One Banner Cymru
- :Allan Garraway
- :Allen's of Tenby
- :Allen Price
- :Allt-fawr
- :Allt-y-Main
- :Allt Cynhelyg
- :Allt Ddu Formation
- :Allt Lwyd
- :Allt Penycoed Stream Section
- :Allt Pontfaen - Coed Gelli-fawr
- :Allt y Benglog National Nature Reserve
- :Alltddu Halt railway station
- :Alltmawr
- :Alltwalis Wind Farm
- :Alltyblacca
- :Alt-y-Graig railway station
- :Alun Carter
- :Alun Davies (historian)
- :Alun Davies (priest)
- :Alun Davies (rugby union)
- :Alun Donovan
- :Alun Evans (priest)
- :Alun Hawkins
- :Alun Herbert Davies
- :Alun Lawrence
- :Alun Pask
- :Alun Priday
- :Alun Pugh
- :Alun Tan Lan
- :Alun Wyn Davies
- :Alyn Gorge
- :Alyn Valley Woods and Alyn Gorge Caves
- :Alyn Waters
- :Alys Conran
- :Alys Williams (singer)
- :Ambrose Mason
- :Amddiffynydd yr Eglwys
- :Amelia Ritchie
- :Amenity society
- :Amlwch Port
- :Amlwch railway station
- :Ammanford (electoral ward)
- :Ammanford Colliery Halt railway station
- :Ammanford railway station (GWR)
- :Ammanford transmitting station
- :Amober
- :Amroth (electoral ward)
- :Amser Te
- :Amy Guy
- :Amy Williams (bowls)
- :An Overshot Mill in Aberdulais, Wales
- :Anafon River
- :Andres Jones
- :Andrew Brereton
- :Andrew Davies (weightlifter)
- :Andrew Fleming (bowls)
- :Andrew House
- :Andrew Jones (priest)
- :Andrew Matthews-Owen
- :Andrew Morris (gymnast)
- :Andrew Morris (priest)
- :Andrew Phillips (priest)
- :Andrew Rowell
- :Andy Allen (rugby union)
- :Andy Booth (rugby union)
- :Andy Edwards (footballer, born 1965)
- :Andy Grimwood
- :Andy Herrick
- :Andy Marinos
- :Anebolithus
- :Aneirin Talfan Davies
- :Aneurin Hughes
- :Aneurin Livermore
- :Aneurin Owen (rugby union)
- :Aneurin Richards
- :Angel Romaeo
- :Angharad Price
- :Angharad ferch Llywelyn
- :Angharad ferch Meurig
- :Anglesey Coalfield
- :Anglesey League
- :Anglesey Mining
- :Anian II (bishop of St Asaph)
- :Anian I (bishop of St Asaph)
- :Ankst
- :Ann Dainton
- :Ann Davies (politician)
- :Ann Harriet Hughes
- :Anna Thomas (comedian)
- :Anne Adams
- :Anne Beauchamp, 15th Countess of Warwick
- :Anneliese Heard
- :Annie Davies
- :Annie Foulkes
- :Annie Powell
- :Anoma Sooriyaarachchi
- :Ansel Marshal
- :Anthony Hulme
- :Anthony Jones (priest)
- :Anthony Morgan of Marshfield and Casebuchan
- :Anthony O'Donnell (actor)
- :Anthony Pierce
- :Ar Lan y Môr
- :Aran Benllyn
- :Aran Volcanic Group
- :Arash Amel
- :Archibald Lush
- :Archie Bastock
- :Archie Hughes (rugby union)
- :Archives Wales
- :Ardal North Cup
- :Ardal South Cup
- :Arddleen
- :Arenig Fawr South Ridge Top
- :Arenig Fawr South Top
- :Arenig railway station
- :Arfon Gwilym
- :Arfon Haines Davies
- :Arfon Williams
- :Arfordir Abereiddi
- :Arfordir Gogleddol Penmon
- :Argoed, Caerphilly
- :Argoed, Flintshire
- :Argoed, Powys
- :Argoed railway station
- :Arise Evans
- :Armorial of local councils in Wales
- :Arnold Butler
- :Arofan
- :Aron ap Rhys
- :Arowry
- :Arthen ap Seisyll
- :Arthog
- :Arthog railway station
- :Arthur Bulkeley
- :Arthur Daniels
- :Arthur Davies (footballer)
- :Arthur Drabble
- :Arthur Evanson
- :Arthur Green (Welsh footballer)
- :Arthur Griffiths (cyclist)
- :Arthur Hickman
- :Arthur Howard Williams
- :Arthur Hughes (Welsh footballer)
- :Arthur Jones (footballer, born 1912)
- :Arthur Kelton
- :Arthur Lloyd (Welsh footballer)
- :Arthur Lloyd (rugby league)
- :Arthur Smith (Welsh footballer)
- :Arts Connect
- :Arwel Richards
- :Arwel Thomas
- :Asbri
- :Ashley Griffiths
- :Ashley Sweet
- :Ashley Williams (boxer)
- :Ashton Hewitt
- :Ashvale, Blaenau Gwent
- :Association of Welsh Translators and Interpreters
- :Aston Park, Flintshire
- :Atgof o'r Sêr
- :Athraw
- :Aubrey Hill (cricketer)
- :Audience Council Wales
- :Audrey Bates
- :Augustus Buckland
- :Austin Savage (field hockey)
- :Avon Inflatables
- :B4319 road
- :B4518 road
- :BAFTA Cymru
- :BBC Cymru Fyw
- :BBC One Wales
- :BT Tower (Swansea)
- :Babel, Carmarthenshire
- :Babell
- :Bachau
- :Bache Hill
- :Backe, Carmarthenshire
- :Badger Face Welsh Mountain sheep
- :Bagillt railway station
- :Baglan Dragons F.C.
- :Baglan Sands Halt railway station
- :Baháʼí Faith in Wales
- :Bala (Penybont) railway station
- :Bala Fault
- :Baldwin de Boulers
- :Baldwins Halt railway station
- :Banc-y-Warren
- :Banc-y-môr
- :Banc Bugeilyn
- :Banc y Mwldan
- :Bancyfelin
- :Bandit (TV series)
- :Baner ac Amserau Cymru
- :Baner y Groes
- :Baneswell
- :Bangor-on-Dee railway station
- :Bangor Aberconwy (UK Parliament constituency)
- :Bangor Teifi
- :Bangor University F.C.
- :Bank of Wales
- :Bank of Williams and Rowland
- :Barbara Margaret Trimble
- :Bardsey Bird and Field Observatory
- :Bargoed railway station
- :Barmouth & Dyffryn United F.C.
- :Barmouth Bay
- :Barnardtown
- :Baron Mostyn
- :Baron of Cymmer-yn-Edeirnion
- :Barrack Hill
- :Barrie Evans
- :Barry (UK Parliament constituency)
- :Barry Clegg (rugby union)
- :Barry College
- :Barry Hospital
- :Barry Metcalf (cricketer)
- :Barry Pier railway station
- :Bassaleg School
- :Bastion Road
- :Bathafarn
- :Battle, Powys
- :Battle of Aberconwy
- :Battle of Bron yr Erw
- :Battle of Bryn Derwin
- :Battle of Cefn Digoll
- :Battle of Hereford
- :Battle of Llandeilo Fawr
- :Battle of Mechain
- :Battle of Pencon
- :Battle of Rhyd Y Groes
- :Battle of Tuthill
- :Bausley with Criggion
- :Baynham Hall
- :Beacon Hill, Powys
- :Beag Fair Siding railway station
- :Beaufort Theatre
- :Beaumaris Town F.C.
- :Beaver's Hill Halt railway station
- :Bedd Arthur
- :Bedd Taliesin
- :Beddau
- :Beddau Halt railway station
- :Beddgelert Fault
- :Beddgeraint
- :Bedlinog
- :Bedlinog railway station
- :Bedo Aeddren
- :Bedo Brwynllys
- :Bedo Hafesp
- :Bedo Phylip Bach
- :Bedwas Workmen's Hall
- :Bedwas railway station
- :Bedwellty (UK Parliament constituency)
- :Bedwellty Greyhound Track
- :Bedwyr Lewis Jones
- :Beechwood, Newport
- :Befis
- :Beggar's Bush, Powys
- :Belan, Powys
- :Beli ab Eiludd
- :Belle Vue, Rhyl
- :Belonging (TV series)
- :Ben Addis
- :Ben Cambriani
- :Ben Carter (rugby union)
- :Ben Castle (rugby union)
- :Ben Davies (Independent minister and author)
- :Ben Davies (poet)
- :Ben Jones (rugby union, born 1998)
- :Ben Lake
- :Ben Platt (cricketer)
- :Ben Thomas (rugby union)
- :Benjamin Alec Lewis
- :Benjamin Davies (Hebraist)
- :Benjamin Jones-Perrott
- :Benlli
- :Benton Fault
- :Bera Bach
- :Bera Mawr
- :Bernard Knight
- :Bernard Thomas
- :Berriew F.C.
- :Bert Cronin
- :Bert Lumberg
- :Bert Williams (footballer, born 1905)
- :Berthyfedwen
- :Bertie Lewis (priest)
- :Bertram Hughes
- :Berw Fault
- :Berw Road Halt railway station
- :Berwig Halt railway station
- :Berwyn, Denbighshire
- :Berwyn Rangers F.C.
- :Berwyn railway station
- :Beryl Hughes
- :Bethan Ellis Owen
- :Bethan Witcomb
- :Bethania, Ceredigion
- :Bethania Chapel, Aberdare
- :Bethesda Urban District
- :Bethesda branch line
- :Bethesda railway station
- :Bethlehem, Carmarthenshire
- :Betsan Llwyd
- :Bettisfield
- :Bettws Cedewain
- :Bettws RFC
- :Betty Gray
- :Betty Morgan (politician)
- :Betws, Carmarthenshire (electoral ward)
- :Betws-y-Coed F.C.
- :Betws Bledrws
- :Betws Garmon
- :Betws Gwerfil Goch
- :Betws Ifan
- :Betws yn Rhos
- :Beulah, Ceredigion
- :Beulah, Powys
- :Beulah Halt railway station
- :Bickerton Edwards
- :Bidofydd
- :Big Pit Halt railway station
- :Big Pool Wood
- :Bigyn (electoral ward)
- :Bill Evans (rugby union)
- :Bill Johnson (rugby league)
- :Bill Lanyon
- :Bill Morgan (rugby)
- :Bill Perry (rugby union)
- :Bill Sweet
- :Bill Thomas (priest)
- :Billy Bassett (Welsh footballer)
- :Billy Hole
- :Billy Hughes (footballer, born 1865)
- :Billy Matthews (footballer, born 1883)
- :Billy Matthews (footballer, born 1897)
- :Billy Mays (footballer)
- :Billy Poyntz
- :Billy Richards (footballer, born 1905)
- :Billy Thomas (rugby league)
- :Billy Thomas (rugby union)
- :Billy Watkins (rugby union)
- :Billy Williams (footballer, born 1896)
- :Birchgrove, Cardiff
- :Bishop's Wood
- :Bishop's messenger
- :Bishop Hedley High School
- :Bishop Vaughan Catholic School
- :Bishop of Llandaff Church in Wales High School
- :Bishop of Penrydd
- :Bishop of Swansea
- :Bishops Castle Town F.C.
- :Bishops Town
- :Bishpool
- :Black Lion Crossing Halt railway station
- :Black Mixen
- :Black Mountain South Top
- :Black Rock Halt railway station
- :Blackmill railway station
- :Blackpill railway station
- :Blackwood Bulldogs
- :Blaen-geuffordd
- :Blaen-pant
- :Blaen-y-Maes
- :Blaen-y-glyn
- :Blaen Celyn
- :Blaenau Gwent and Rhymney (UK Parliament constituency)
- :Blaenavon Low Level railway station
- :Blaenbedw Fawr
- :Blaenborthyn
- :Blaencediw Formation
- :Blaendare Road Halt railway station
- :Blaengarw railway station
- :Blaengwawr Comprehensive School
- :Blaengwynfi
- :Blaenhonddan
- :Blaenllechau
- :Blaenplwyf
- :Blaenrheidol
- :Blaenrhondda Road Cutting
- :Blaenrhondda railway station
- :Blaenycoed
- :Blaina & District Hospital
- :Bleddfa
- :Bleddyn Ddu
- :Bleddyn Fardd
- :Bleddyn Jones
- :Bledri
- :Bleiddwn
- :Blodau Yr Oes
- :Blodau cerdd
- :Blue Pool Bay
- :Boating Lake Park
- :Bob Colville
- :Bob Delyn a'r Ebillion
- :Bob Griffiths (priest)
- :Bob Kennard
- :Bob Lock
- :Bob Pugh
- :Bob Shaw (athlete)
- :Bobby Jones (rugby union)
- :Bod Deiniol Formation
- :Bodeidda Mudstone
- :Bodewryd
- :Bodfach
- :Bodfari
- :Bodfari railway station
- :Bodferin
- :Bodffordd
- :Bodlondeb Woods
- :Boduan
- :Bodwyn
- :Bon-y-maen
- :Boncath railway station
- :Bonedd y Saint
- :Bont Dolgadfan
- :Bont F.C.
- :Bont Fawr
- :Bont Goch
- :Bont Newydd railway station
- :Bontddu
- :Bontnewydd, Ceredigion
- :Bontnewydd, Gwynedd
- :Bontnewydd railway station
- :Bontuchel
- :Bonwm Halt railway station
- :Bonymaen Broncos
- :Book of Aneirin
- :Book of Cynog
- :Borras Park
- :Borras Park Albion F.C.
- :Borth United F.C.
- :Borth railway station
- :Borthwnog
- :Bosherston Lakes
- :Boss Brewing
- :Botany Bay, Monmouthshire
- :Botwnnog
- :Boughrood
- :Boughrood & Llyswen railway station
- :Boughrood Brest
- :Bow Street railway station
- :Boyd Clack
- :Boyo James
- :Bracelet Bay
- :Bradley Park Rangers F.C.
- :Bragod
- :Braint
- :Brandy Cove
- :Brandy Hill, Wales
- :Branwen (film)
- :Branwen Gwyn
- :Breaksea Point
- :Brechfa Forest Wind Farm
- :Brecknock Hill Cheviot
- :Brecknock Rural District
- :Brecknock Society and Museum Friends
- :Brecon, Radnor and Cwm Tawe (UK Parliament constituency)
- :Brecon Buff Goose
- :Breidden railway station
- :Bretton Bridge
- :Bretton Hall, Flintshire
- :Brian Cresswell
- :Brian Davies (rugby union)
- :Brian James (priest)
- :Brian Jarvis
- :Brian Jones (rugby union)
- :Brian Lewis (cricketer)
- :Brian Rees
- :Bridge End Inn
- :Bridge FM (Wales)
- :Bridgend Industrial Estate
- :Bridgend railway station (L&OG)
- :Bristol Channel Fault Zone
- :Brithdir, Caerphilly
- :Brithdir, Ceredigion
- :Brithdir, Gwynedd
- :Brithdir, Powys
- :Brithdir and Llanfachreth
- :Brithdir railway station
- :British Association of International Mountain Leaders
- :British Coastal Deposits Group
- :British Rhondda Halt railway station
- :British Steel (Port Talbot) Golf Club
- :Briton Ferry Athletic F.C.
- :Briton Ferry East railway station
- :Briton Ferry Llansawel A.F.C.
- :Briton Ferry RFC
- :Briton Ferry Road railway station
- :Briton Ferry West railway station
- :Bro Aberffraw
- :Bro Cernyw F.C.
- :Bro Garmon
- :Bro Goronwy F.C.
- :Broad Oak and Thornhill Meadows
- :Broad Water
- :Broadfield, Pembrokeshire
- :Brockweir Halt railway station
- :Broginin
- :Bronaber
- :Bronant
- :Brondyffryn Trust
- :Brongest
- :Bronglais Hospital
- :Brongwyn
- :Bronington
- :Bronnant Fault
- :Bronydd Formation
- :Brook Street Halt railway station
- :Broughton, Vale of Glamorgan
- :Broughton & Bretton railway station
- :Broughton Hall, Flintshire
- :Broughton and Bretton
- :Brown Lenox & Co Ltd
- :Brut y Saeson
- :Bryan D. White
- :Bryan Richards
- :Bryan Williams (priest)
- :Brymbo West Crossing Halt railway station
- :Brymbo railway station (Great Central Railway)
- :Brymbo railway station (Great Western Railway)
- :Bryn, Llanelli
- :Bryn-Celynog Halt railway station
- :Bryn Alyn
- :Bryn Cader Faner
- :Bryn Celyn
- :Bryn Celynnog Comprehensive School
- :Bryn Day
- :Bryn Du
- :Bryn Eryr
- :Bryn Euryn
- :Bryn Hafod
- :Bryn Hynod Halt railway station
- :Bryn Offa
- :Bryn Rovers A.F.C.
- :Bryn Siltstone
- :Bryn railway station (Glamorgan)
- :Bryn yr Ŵyn
- :Brynafan
- :Brynamman East railway station
- :Brynamman West railway station
- :Bryncarnau Grasslands, Llwydcoed
- :Bryncethin
- :Bryncoch
- :Bryncoch North
- :Bryncroes
- :Bryncrug
- :Bryndioddef-isaf
- :Bryneglwys
- :Bryneglwys Fault
- :Brynford
- :Bryngolau
- :Bryngwran Bulls F.C.
- :Bryngwyn
- :Bryngwyn, Ceredigion
- :Bryngwyn Comprehensive School
- :Bryngwyn Halt railway station
- :Brynhoffnant
- :Brynhyfryd, Swansea
- :Brynkir railway station
- :Brynmawr Foundation School
- :Brynmawr Urban District
- :Brynmenyn railway station
- :Brynmill railway station
- :Brynna a Wern Tarw
- :Brynsadler
- :Bryntail lead mine
- :Brynteg, Anglesey
- :Brynteg, Wrexham
- :Bryn–bach, Cefn Cribwr
- :Buckland Coach House & Ice House
- :Buckley Claypits and Commons
- :Builth Volcanic
- :Builth Wells F.C.
- :Builth Wells RFC
- :Builth Wells Urban District
- :Builth Wells railway station
- :Bull Bay, Anglesey
- :Bulmore
- :Burgedin
- :Burrium
- :Burry Holms
- :Burry Inlet and Loughor Estuary
- :Burry Port (electoral ward)
- :Burry Port RFC
- :Burry Port railway station
- :Burton's, Abergavenny
- :Burton, Wrexham
- :Burton (Pembrokeshire electoral ward)
- :Burwen
- :Bute Dock Police
- :Bute Town
- :Butetown railway station
- :Buttington
- :Buttington railway station
- :Bwlch-y-cibau
- :Bwlchyfadfa
- :Bwletin Cymdeithas Emynau Cymru
- :Bwrdd Arthur
- :Bye-gones
- :Bylchau
- :Bynea
- :Bynea railway station
- :C.P.D. Caer Clwyd
- :C.P.D. Gwalchmai
- :C.P.D. Y Rhyl 1879
- :C.P.D. Yr Wyddgrug
- :CEWC-Cymru
- :CF99
- :CK Swiss Valley A.F.C.
- :CWFA Challenge Cup
- :Cadair Bronwen
- :Cadair Ifan Goch
- :Cadell Ddyrnllwg
- :Cadell ap Brochfael
- :Cadell ap Rhodri
- :Cader
- :Cadfarch
- :Cadoxton, Vale of Glamorgan
- :Cadoxton Terrace Halt railway station
- :Cadwalader's Ice Cream
- :Cadwalader Hughes
- :Cadwaladr Cesail
- :Cadwaladr Price
- :Cadwaladr ap Rhys Trefnant
- :Cadwgan Delynor
- :Cadwgan Ffôl
- :Cadwgan ab Owain
- :Cadwgan ap Meurig
- :Cae-y-Castell
- :Cae Blaen-dyffryn
- :Cae Cilmaenllwyd
- :Cae Cwm-tywyll
- :Cae Gwernllertai
- :Cae Gwyn SSSI
- :Cae Gwynfryn
- :Cae Maes-y-ffynnon
- :Caeathro
- :Caeau Afon Gwili
- :Caeau Blaen-yr-Orfa
- :Caeau Blaenau-mawr
- :Caeau Bronydd-mawr
- :Caeau Capel Hendre
- :Caeau Caradog
- :Caeau Cefn Cribwr
- :Caeau Cnwch a Ty'n-y-graig
- :Caeau Heol y Llidiart-coch
- :Caeau Llety-cybi
- :Caeau Nant Garenig
- :Caeau Nant y Llechau
- :Caeau Nantsais
- :Caeau Pen-y-coed
- :Caeau Rhyd-y-gwiail
- :Caeau Tir-mawr
- :Caeau Ty'n-llwyni
- :Caegarw
- :Caehopkin
- :Caemawr Greyhound Stadium
- :Caer Gybi (fort)
- :Caer Sidi
- :Caerau, Anglesey
- :Caerau, Bridgend
- :Caerau railway station
- :Caereinion
- :Caerfarchell
- :Caergeiliog
- :Caerleon Bridge
- :Caerleon Tramroad
- :Caerleon Urban District
- :Caernarfon Airworld Aviation Museum
- :Caernarfon Bay
- :Caerphilly District Miners Hospital
- :Caerphilly F.C.
- :Caerphilly Golf Club
- :Caersws Roman Forts
- :Caerwedros
- :Caerwedros (commote)
- :Caerwys Rectory
- :Caerwys Tufa
- :Caerwys railway station
- :Cafnan
- :Cai Evans
- :Caim, Anglesey
- :Caio, Carmarthenshire
- :Calan (band)
- :Calcoed
- :Caldicot Hundred
- :Caledonia Glacigenic Group
- :Calendar of saints (Church in Wales)
- :Callum Carson
- :Callum Taylor (Welsh cricketer)
- :Callum Williams
- :Calvert Jones
- :Cambria (journal)
- :Cambrian Caving Council
- :Cambrian Law Review
- :Camddwr
- :Camddwr, Teifi
- :Cameleon (film)
- :Cameron Evans
- :Cameron Herring
- :Cameron Winnett
- :Cameron Wright (weapons scientist)
- :Camnant Mudstone
- :Canolbarth Môn
- :Canovium
- :Canton F.C.
- :Cantonian High School
- :Cantref Llŷn
- :Cantref Mawr
- :Capel Bangor
- :Capel Betws Lleucu
- :Capel Celyn Halt railway station
- :Capel Coch
- :Capel Dewi, Carmarthenshire
- :Capel Dewi, Faenor
- :Capel Dewi, Llandysul
- :Capel Garmon
- :Capel Gwyn
- :Capel Mawr
- :Capel Parc
- :Capel Salem, Pwllheli
- :Capel Tygwydd
- :Capel Y Crwys
- :Capital Cymru
- :Capitol Theatre, Cardiff
- :Caradog (Griffith Rhys Jones)
- :Caradog Falls Halt railway station
- :Cardiff (UK Parliament constituency)
- :Cardiff Arena
- :Cardiff Bay Retail Park
- :Cardiff Celts
- :Cardiff Celts Volleyball Club
- :Cardiff City F.C. (women)
- :Cardiff Crockherbtown railway station
- :Cardiff Draconians F.C.
- :Cardiff Film Festival
- :Cardiff Horse Show
- :Cardiff Huskies
- :Cardiff Marathon
- :Cardiff North West (UK Parliament constituency)
- :Cardiff Parkrun
- :Cardiff Parkway railway station
- :Cardiff RLFC
- :Cardiff Reform Synagogue
- :Cardiff Riverside Branch
- :Cardiff Sevens
- :Cardiff South (UK Parliament constituency)
- :Cardiff South East (UK Parliament constituency)
- :Cardiff and Vale College
- :Cardiff–Newport metropolitan area
- :Cardigan County School
- :Cardinal Newman Roman Catholic School, Rhydyfelin
- :Cardonnel Halt railway station
- :Cariad Cywir
- :Carissa Turner
- :Carlyle Witton-Davies
- :Carmarthen Cemetery Chapel
- :Carmarthen Grammar School
- :Carmarthen Group
- :Carmarthen Journal
- :Carmarthen Park
- :Carmarthen Public Rooms
- :Carmarthen Quins RFC
- :Carmarthen Rural District
- :Carmarthen Weekly Reporter
- :Carmarthenshire (UK Parliament constituency)
- :Carmarthenshire County Museum
- :Carmel, Anglesey
- :Carmel, Carmarthenshire
- :Carmel, Flintshire
- :Carmel, Gwynedd
- :Carmel Head
- :Carmel Head Thrust
- :Carn Fadryn
- :Carn Gafallt
- :Carn Ingli
- :Carnarvon Ironopolis F.C.
- :Carnedd Iago Formation
- :Carnedd Llechwedd-llyfn
- :Carnedd y Ddelw
- :Carnedd y Filiast (Cerrigydrudion)
- :Carnedd y Filiast (Glyderau)
- :Carnetown
- :Carnguwch
- :Carno
- :Carol Evans
- :Caroline, Lady Wilkinson
- :Carreg Cennan
- :Carreg Coetan Arthur
- :Carreg yr Imbill
- :Carreghofa
- :Carreghofa Halt railway station
- :Carreglefn
- :Carrick McDonough
- :Carrog
- :Carrog, Anglesey
- :Carrog railway station
- :Carway
- :Carwyn Ellis
- :Carwyn Jones (rugby union)
- :Carwyn Penny
- :Carwyn Tuipulotu
- :Caryl Parry Jones
- :Carys Parry
- :Carys Phillips
- :Cascob
- :Casnodyn
- :Cassia Pike
- :Castell Cawr
- :Castell Deudraeth
- :Castell Madoc
- :Castell y Gwynt
- :Castle Caereinion railway station
- :Castle Cinema
- :Castle Farmhouse, St Georges-super-Ely
- :Castle Hill, Ceredigion
- :Castle Hotel, Aberaeron
- :Castle House, Laugharne
- :Castle Park, Caerphilly
- :Castlebythe Halt railway station
- :Castlemartin Corse
- :Castleton, Newport
- :Cat's Ash
- :Catbrook
- :Cathays Methodist Church
- :Cathedral Road, Cardiff
- :Catherine Fookes
- :Catherine Prichard
- :Cathinog Hundred
- :Cathy Dawson
- :Catnic
- :Catrin Jones
- :Catrin ferch Owain Glyndŵr
- :Cayo Hundred
- :Cebur
- :Cecil Smith (footballer, born 1904)
- :Ceffyl Dŵr
- :Ceffyl Pren
- :Cefn, Wrexham
- :Cefn-cerig road
- :Cefn-y-Llwyd
- :Cefn-y-bedd
- :Cefn Caves
- :Cefn Coch
- :Cefn Coed Colliery Halt railway station
- :Cefn Coed railway station
- :Cefn Cribwr F.C.
- :Cefn Croes Wind Farm
- :Cefn Fforest
- :Cefn Glas
- :Cefn Gwlad
- :Cefn Gwyntog
- :Cefn Hengoed
- :Cefn Hengoed, Swansea
- :Cefn Llechid
- :Cefn Mably House
- :Cefn Meadow
- :Cefn Rhigos
- :Cefn railway station
- :Cefn yr Ogof
- :Cefnddwysarn
- :Cefneithin
- :Cefntilla Halt railway station
- :Ceibwr Bay Fault
- :Ceidio
- :Ceint railway station
- :Ceiriog Rural District
- :Ceiswyn Formation
- :Ceitho
- :Celtic Blue Rock Community Arts Festival
- :Celtic Trail cycle route
- :Celtic Weekly Newspapers
- :Celtic rainforest
- :Celynen North Halt railway station
- :Cemais (Anglesey)
- :Cemlyn
- :Cemmaes
- :Cemmaes Road
- :Cenarth Falls
- :Ceneu
- :Cennad
- :Cennych
- :Cennydd Traherne
- :Central Wales Football League
- :Central Wales Lineament
- :Cephalonian method
- :Cerddor y Tonic Sol-ffa
- :Ceredigion (journal)
- :Ceredigion Historical Society
- :Ceredigion League
- :Ceredigion Museum
- :Ceredigion Preseli (UK Parliament constituency)
- :Ceri Dallimore
- :Ceri Holland
- :Ceri Sherlock
- :Cerist railway station
- :Cernydd Carmel
- :Cerrig Mân
- :Cerrigceinwen
- :Cestyll Garden
- :Ceulanamaesmawr
- :Ceunant Cynfal National Nature Reserve
- :Ceunant Llennyrch National Nature Reserve
- :Champion Beer of Wales
- :Chancery, Ceredigion
- :Change, Grow, Live
- :Charles Cecil (bishop)
- :Charles Coltman-Rogers
- :Charles Conde
- :Charles Dale
- :Charles Davies (Baptist minister)
- :Charles Edwards (footballer)
- :Charles Griffith (priest)
- :Charles Horace Watkins
- :Charles Kemeys-Tynte, 8th Baron Wharton
- :Charles Ketley
- :Charles Lawrence, 2nd Baron Trevethin
- :Charles Lewis (priest)
- :Charles Norris (etcher)
- :Charles Prestwood Lucas
- :Charles Price (Welsh politician)
- :Charles Roberts (priest)
- :Charles Thomas (footballer)
- :Charlie Caton
- :Charlie Dyke
- :Charlie Estcourt
- :Charlie Faulkner
- :Charlie Smith (footballer)
- :Charlotte Williams-Wynn (aristocrat)
- :Charlotte Wingfield
- :Charubel
- :Che Hope
- :Cheetah Marketing
- :Chelsea Lewis (netball)
- :Chem Campbell
- :Chepstow Rural District
- :Chief Coroner of England and Wales
- :Chirk AAA F.C.
- :Chirk Rural District
- :Chirk Town F.C.
- :Chirkland
- :Chloe Bull
- :Chloe Chivers
- :Chloé Tutton
- :Chris Birch (stroke survivor)
- :Chris Bridges
- :Chris Davies (Conservative politician)
- :Chris Fry (footballer)
- :Chris Potter (priest)
- :Chris Riley (Welsh footballer)
- :Chris Smith (priest)
- :Chris Stephens (rugby union)
- :Chris Venables
- :Chris Wells (curler)
- :Christ Church, Bala
- :Christ Church, Carmarthen
- :Christ Church, Radyr
- :Christ College, Brecon
- :Christian Purslow
- :Christina Booth
- :Christine Evans
- :Christine Humphreys
- :Christopher Flynn
- :Christopher Gwynne Lewis
- :Christopher Mends
- :Christopher Salmon
- :Church Village Halt railway station
- :Church of St Michael and All Angels, Forden
- :Churchstoke F.C.
- :Chwalfa
- :Chwarel Pant Glas
- :Chwarel Singret
- :Chwilog railway station
- :Cil-y-groeslwyd Woods, Eyarth Woods & Rocks & Craig Adwy-wynt
- :Cilcain Hall
- :Cilcennin
- :Cilfrew railway station
- :Cilfynydd railway station
- :Ciliau Aeron
- :Cilmeri
- :Cilmeri railway station
- :Cilycwm
- :Cilycwm (electoral ward)
- :Cim, Caernarfonshire
- :Cissy Davies
- :City, Vale of Glamorgan
- :Civic Trust for Wales
- :Civil Aid Voluntary Rescue Association
- :Claerwen
- :Claerwen Fault
- :Claire Evans
- :Claire Summers
- :Clarach Bay
- :Clarence Road railway station
- :Clarenceux King of Arms
- :Clark Shiels
- :Clase
- :Clatter, Powys
- :Clawdd Poncen
- :Clawddnewydd
- :Clayton Thomas
- :Cledan Mears
- :Cliff Lloyd
- :Cliff Williams (rugby, born 1939)
- :Cliff Wood – Golden Stairs
- :Clifford Dyment
- :Clifford Lloyd
- :Clipyn Du
- :Clocaenog
- :Clogau Quarry
- :Cloten of Dyfed and Brycheiniog
- :Cloy Brook Pastures
- :Cloy Halt railway station
- :Clwyd-Powys Archaeological Trust
- :Clwyd County Council
- :Clwyd East (UK Parliament constituency)
- :Clwyd North (UK Parliament constituency)
- :Clwyd North West (UK Parliament constituency)
- :Clydach-on-Tawe railway station
- :Clydach (electoral ward)
- :Clydach Court Halt railway station
- :Clydau (electoral ward)
- :Clydwyn
- :Clyne, Neath Port Talbot
- :Clyne Halt railway station
- :Clyro
- :Clytha
- :Clywedog Trail
- :Cnap Twt
- :Cneppyn Gwerthrynion
- :Cnicht
- :Cnicht North Top
- :Coal Face
- :Cochwillan
- :Cockshead
- :Coed-Ely
- :Coed-y-Cerrig National Nature Reserve
- :Coed-y-bryn
- :Coed-y-paen
- :Coed Camlyn National Nature Reserve
- :Coed Cwm Clettwr
- :Coed Cymerau National Nature Reserve
- :Coed Dolgarrog National Nature Reserve
- :Coed Ely railway station
- :Coed Eva
- :Coed Ganllwyd National Nature Reserve
- :Coed Gorswen National Nature Reserve
- :Coed Gwempa
- :Coed Llandyfan
- :Coed Morgan
- :Coed Nant Menascin
- :Coed Poeth railway station
- :Coed Rheidol National Nature Reserve
- :Coed Talon
- :Coed Talon Marsh
- :Coed Talon railway station
- :Coed Tremadog National Nature Reserve
- :Coed y Bwl
- :Coed y Ciliau
- :Coed y Crychydd
- :Coed y Garth, Ceredigion
- :Coed y Gopa
- :Coed y Rhygen National Nature Reserve
- :Coedana
- :Coedcae School
- :Coedffranc
- :Coedffranc Central
- :Coedkernew
- :Coedmor National Nature Reserve
- :Coedpenmaen
- :Coedpenmaen railway station
- :Coedydd Aber National Nature Reserve
- :Coedydd Capel Dyddgen
- :Coedydd Dyffryn Alwen
- :Coedydd Maentwrog National Nature Reserve
- :Coedydd y Garn
- :Coedyfoel
- :Coedymwstwr Woodlands
- :Coelbren, Powys
- :Coetan Arthur
- :Coetmor
- :Cog Moors
- :Cold Knap
- :Coldra
- :Coleford railway station
- :Coleg Ceredigion
- :Coleg Elidyr
- :Coleg Gwent
- :Coleg Harlech
- :Coleg Meirion-Dwyfor
- :Coleg Menai
- :Coleg Morgannwg
- :Coleg Powys
- :Coleshill, Flintshire
- :Colin Jones (boxer)
- :Colin Standing
- :Colin Treharne
- :Coliseum Theatre (Aberdare)
- :Colston, Pembrokeshire
- :Colwyn Castle
- :Colwyn Rural District
- :Coming Home (British TV series)
- :Coming Up Roses (1986 film)
- :Comins Coch
- :Commercial Street Platform railway station
- :Commins, Denbighshire
- :Commins Coch
- :Commins Coch Halt railway station
- :Commissioner for Older People (Wales) Act 2006
- :Compendium Competorum
- :Compurgation
- :Connah's Quay High School
- :Connah's Quay Ponds and Woodland
- :Connah's Quay Town Football Club
- :Connah's Quay railway station
- :Connor Brown (cricketer)
- :Connor Edwards
- :Connor Farrer
- :Contention of the Bards in Gwynedd
- :Conway Marsh railway station
- :Conway Rees
- :Conway Street drill hall, Brecon
- :Conway baronets
- :Conwy Rural District
- :Conwy Valley Railway Museum
- :Conybeare Bruce
- :Cook's Bridge, Rossett
- :Corey Baldwin
- :Cornelly
- :Cornist Hall
- :Corris Railway Grand Tour
- :Corris Uchaf
- :Cors Bodeilio National Nature Reserve
- :Cors Bryn-y-Gaer
- :Cors Dyfi nature reserve
- :Cors Erddreiniog National Nature Reserve
- :Cors Farlais
- :Cors Geirch National Nature Reserve
- :Cors Goch National Nature Reserve (Anglesey)
- :Cors Goch National Nature Reserve (Llanllwch)
- :Cors Nantcwnlle
- :Cors y Llyn National Nature Reserve
- :Corsydd Llangloffan
- :Corsydd a Rwyth Cilyblaidd
- :Corwen railway station
- :Coryton, Cardiff
- :Coryton Line
- :County Hospital, Torfaen
- :County Observer and Monmouthshire Central Advertiser
- :County Voluntary Council
- :Court Sart railway station
- :Court leet
- :Courtney Davies
- :Covenant Society of the Free Welsh
- :Cowbridge (Roman town)
- :Cowbridge Road East
- :Cowbridge Road West
- :Cowbridge with Llanblethian
- :Cradoc, Powys
- :Cradoc railway station
- :Crai, Powys
- :Crai (village)
- :Crai Reservoir
- :Craig-cefn-parc
- :Craig-y-llyn
- :Craig-y-nos railway station
- :Craig-y-penrhyn
- :Craig-y-pistyll
- :Craig Barnsley
- :Craig Cerrig-gleisiad
- :Craig Cerrig-gleisiad and Fan Frynych National Nature Reserve
- :Craig Cwm Amarch
- :Craig Cwm Silyn
- :Craig Cywarch
- :Craig Ddu–Wharley Point Cliffs
- :Craig Eigiau
- :Craig Evans (Welsh cricketer)
- :Craig Evans (rugby union referee)
- :Craig Goch Dam
- :Craig Gwaun Taf
- :Craig Hawkins
- :Craig Pilling
- :Craig Pont Rhondda
- :Craig Rhos-y-felin
- :Craig Williams (British politician)
- :Craig y Cilau
- :Craig y Forwyn (Denbighshire)
- :Craig yr Hafod Tramroad
- :Craiglon Bridge Halt railway station
- :Craiglwyn
- :Craigysgafn
- :Cray railway station
- :Creation Management
- :Creigiau Gleision North Top
- :Creigiau railway station
- :Cremlyn
- :Cresswell Castle
- :Crest Mawr Wood
- :Creuddyn, Ceredigion
- :Creuddyn Peninsula
- :Crew Green railway station
- :Crib-y-rhiw
- :Cribarth Disturbance
- :Cribin Fawr
- :Cribyn
- :Criccieth Golf Course
- :Criccieth Urban District
- :Crickhowell High School
- :Criggion
- :Criggion railway station
- :Crime and disorder reduction partnership
- :Crindau
- :Crindau Marina
- :Cristiolus
- :Cristion
- :Croes-lan
- :Croesor
- :Croespenmaen
- :Cromlech, Anglesey
- :Cronicl (Llanbrynmair)
- :Cronicl y Cerddor
- :Cronicl y Cymdeithasau Crefyddol
- :Cronicl yr Ysgol Sabbothol
- :Cross Ash
- :Cross Hands
- :Cross Inn
- :Cross Inn, Llantrisant
- :Cross Inn railway station
- :Crossgates, Powys
- :Crossgates Coaches
- :Crosskeys College
- :Crossway, Monmouthshire
- :Cruciform passage grave
- :Crucorney
- :Crug Eryr Castle
- :Crug Hywel
- :Crugyreryr
- :Crumlin railway station (Wales)
- :Crwst
- :Crwys Road railway station
- :Crychan Forest Tracks
- :Crychan Formation
- :Crynant New Colliery Halt railway station
- :Crynfryn
- :Culturenet Cymru
- :Cuneglasus
- :Custos Rotulorum of Anglesey
- :Custos Rotulorum of Caernarvonshire
- :Custos Rotulorum of Cardiganshire
- :Custos Rotulorum of Monmouthshire
- :Custos Rotulorum of Radnorshire
- :Cwar Glas Quarry and Sawdde Gorge
- :Cwm, Denbighshire
- :Cwm-Hwnt
- :Cwm-y-Glo railway station
- :Cwm Bach, Sychpant
- :Cwm Bargoed railway station
- :Cwm Cadlan
- :Cwm Caseg
- :Cwm Clydach, Kidwelly
- :Cwm Craig-ddu Quarry
- :Cwm Crymlyn Road Section
- :Cwm Cydfin, Leckwith
- :Cwm Cyffog
- :Cwm Dewi
- :Cwm Doethie – Mynydd Mallaen
- :Cwm Du Woodlands
- :Cwm Felin Boeth Formation
- :Cwm Glo
- :Cwm Llwyd Fault
- :Cwm Nantcol
- :Cwm Penmachno
- :Cwm Pennant Fault
- :Cwm Risca Meadow
- :Cwm Silicon
- :Cwm Taf Fechan Woodlands
- :Cwm Wanderers A.F.C.
- :Cwm yr Abbey Stream Section
- :Cwmaman Colliery Halt railway station
- :Cwmaman Crossing Halt railway station
- :Cwmann
- :Cwmavon Glam railway station
- :Cwmbach
- :Cwmbach, Carmarthenshire
- :Cwmbach railway station
- :Cwmbran Central
- :Cwmbran High School
- :Cwmbran Stadium
- :Cwmbrwyno
- :Cwmcarn railway station
- :Cwmcarnhywel
- :Cwmcarvan
- :Cwmcoednerth
- :Cwmdauddwr
- :Cwmdu, Swansea
- :Cwmdu railway station
- :Cwmduad
- :Cwmfelin
- :Cwmfelinfach
- :Cwmffrwd
- :Cwmffrwd Halt railway station
- :Cwmffrwdoer Halt railway station
- :Cwmgiedd
- :Cwmllynfell
- :Cwmllynfell railway station
- :Cwmneol Halt railway station
- :Cwmpennar
- :Cwmrhyd-y-Gau Halt railway station
- :Cwmrhydyceirw
- :Cwmsychbant
- :Cwmsyfiog Halt railway station
- :Cwmsymlog
- :Cwmtawe Community School
- :Cwmtwrch RFC
- :Cwmwysg
- :Cwmynyscoy
- :Cwmystwyth
- :Cwrt-y-Gollen
- :Cwrt Herbert
- :Cwrtnewydd
- :Cy Thomas
- :Cycling at the 1958 British Empire and Commonwealth Games – Men's individual pursuit
- :Cyfaill Deoniaeth Llanbadarn Fawr
- :Cyfaill o'r Hen Wlad yn America
- :Cyfarthfa
- :Cyffylliog
- :Cyfrinach y Bedyddwyr
- :Cyfronydd Hall
- :Cyfronydd railway station
- :Cyfrwy
- :Cyfyw
- :Cylch-grawn Cynmraeg
- :Cyledr Wyllt
- :Cymau
- :Cymdeithas Edward Llwyd
- :Cymdeithas Lyfrau Ceredigion
- :Cymdeithas y Dysgwyr
- :Cymer Abbey
- :Cymerig Limestone
- :Cymmer Afan railway station
- :Cymmer Corrwg railway station
- :Cymru Alliance League Cup
- :Cymyran Strait
- :Cynan Nant Nyfer
- :Cynan ap Hywel
- :Cynan ap Maredudd
- :Cynffig
- :Cynffig/Kenfig SSSI
- :Cynfrig ap Madog
- :Cynghordy
- :Cynghordy railway station
- :Cynhaiarn
- :Cynheidre Colliery
- :Cynllaith
- :Cynllo
- :Cynnull-mawr
- :Cynonville Halt railway station
- :Cynwyd, Denbighshire
- :Cynwyd Forest Quarry
- :Cynwyd railway station (Wales)
- :Cynwyl Elfed
- :Cynwyl Elfed (electoral ward)
- :Cynwyl Gaeo
- :Cynwyl Gaeo (electoral ward)
- :Cyril Davies (rugby union)
- :Cyril John Harvey
- :Cyril Jones (footballer)
- :Cyril Le Marquand
- :Cyril Trailor
- :Cyril the Swan
- :Cyrn Formation
- :Cytgan
- :Cytir Mawr
- :Cytûn
- :Cywarch
- :Cywydd
- :D. Ben Rees
- :D. C. Harries
- :D. Huw Owen
- :Dafen, Carmarthenshire
- :Dafen (electoral ward)
- :Dafydd Alaw
- :Dafydd Bach ap Madog Wladaidd
- :Dafydd Baentiwr
- :Dafydd Benfras
- :Dafydd Benwyn
- :Dafydd Cadwaladr
- :Dafydd Ddu o Hiraddug
- :Dafydd Emlyn
- :Dafydd Epynt
- :Dafydd Fynglwyd
- :Dafydd Glyn Dyfrdwy
- :Dafydd Glyn Jones
- :Dafydd Goch Brydydd o Fuallt
- :Dafydd Gorlech
- :Dafydd Ieuan
- :Dafydd Ifans
- :Dafydd Jenkins (rugby union)
- :Dafydd Llwyd ap Dafydd ab Einion ap Hywel
- :Dafydd Llyfni
- :Dafydd Offeiriad
- :Dafydd Roberts
- :Dafydd Trefor
- :Dafydd ab Ieuan ab Iorwerth
- :Dafydd ab Owain (bishop)
- :Dafydd ap Bleddyn
- :Dafydd ap Dafydd Llwyd
- :Dafydd ap Gruffydd (poet)
- :Dafydd ap Harri Wyn
- :Dafydd ap Huw'r Gof
- :Dafydd ap Hwlcyn ap Madog
- :Dafydd ap Hywel Grythor
- :Dafydd ap Ieuan Llwyd
- :Dafydd ap Ieuan ab Owen
- :Dafydd ap Llywelyn ap Madog
- :Dafydd ap Maredudd Glais
- :Dafydd ap Maredudd ab Ednyfed
- :Dafydd ap Maredudd ap Tudur
- :Dafydd ap Phylip ap Rhys
- :Dafydd ap Rhys o Fenai
- :Dafydd y Coed
- :Dai Astley
- :Dai Bevan
- :Dai Collier
- :Dai Hopkins (footballer, born 1902)
- :Dai Lawrence
- :Dai Lewis (footballer)
- :Dai Llwyd
- :Dai Maesmor
- :Dai Powell
- :Dai Rees (rugby, born c. 1885)
- :Dai Thomas (footballer, born 1926)
- :Dail Glaswellt
- :Daily Post (North Wales)
- :Dal: Yma/Nawr
- :Dal Ati
- :Dan-Lan-Y-Castell Quarry
- :Dan Edwards (rugby union)
- :Dan Isaac Davies
- :Dan Newton
- :Daniel Davies (bishop)
- :Daniel Davies (physician, born 1899)
- :Daniel Font
- :Daniel John Davies
- :Daniel Lewis Lloyd
- :Daniel Pearson (cyclist)
- :Daniel Price (priest)
- :Daniel ap Llosgwrn Mew
- :Danycoed Halt railway station
- :Danygraig Halt railway station
- :Daren
- :Daren Fach
- :Daren y Dimbath
- :Darius Jokarzadeh
- :Dark Horse: The Incredible True Story of Dream Alliance
- :Darland High School
- :Darlunydd
- :Darran Valley
- :Darren Waters
- :Datblygu
- :Dave Campbell (Welsh footballer)
- :Dave Jones (footballer, born 1932)
- :Dave Thomas (rugby union, born 1941)
- :David Archard Williams
- :David Bartlett (bishop)
- :David Blodwell
- :David Bowen, Felinfoel
- :David Bowen (pathologist)
- :David Bryant (rugby union)
- :David Bryn-Jones
- :David Burcher
- :David Charles (minister)
- :David Christopher Davies
- :David Christopher Davies (missionary)
- :David D'Auria
- :David Daron
- :David Davies (Baptist minister)
- :David Davies (Dean of Wellington)
- :David Davies (Independent minister and magazine editor)
- :David Davies (Welsh priest)
- :David Davies (archdeacon of Llandaff)
- :David Davies (composer)
- :David Davies (harpist)
- :David Davies (physician)
- :David Davies (rugby league, born c. 1915)
- :David Davis (Castellhywel)
- :David Edwardes (deputy herald)
- :David Edwardes Davies
- :David Edwards (footballer, born 1934)
- :David Emrys Lewis
- :David Evans (MP for Cardiff)
- :David Evans (archdeacon of St Asaph)
- :David Evans (rugby union, born 1988)
- :David Glyn Bowen
- :David Griffith (Clwydfardd)
- :David Griffiths (archdeacon of Monmouth)
- :David Griffiths (sport shooter)
- :David Herbert Lloyd
- :David Howell (priest)
- :David Jacobs (Welsh athlete)
- :David James Jenkins
- :David John Davies
- :David John Hayward
- :David John Sully
- :David Jones (antiquary, fl. 1560–1590)
- :David Jones (antiquary, fl. 1750–1780)
- :David Jones (archdeacon of Carmarthen)
- :David Jones (footballer, born 1910)
- :David Jones (footballer, born 1952)
- :David Joshua Davies
- :David Lambert (footballer)
- :David Lee (archdeacon of Llandaff)
- :David Lewis (British MP)
- :David Lewis Davies
- :David Lewis Jones
- :David Lloyd (biographer)
- :David Lloyd (tenor)
- :David Lloyd George, 2nd Viscount Tenby
- :David Maddocks
- :David Maurice
- :David Morral Lewis
- :David Morris (footballer, born 1957)
- :David Murray (1748–1794)
- :David Nicholas (rugby union)
- :David O'Dowd
- :David Owen (Dewi Wyn o Eifion)
- :David Parry-Jones
- :David Parry (scholar)
- :David Phelps (sport shooter)
- :David Pugh (footballer, born 1947)
- :David Reece (bishop)
- :David Rees-Williams, 1st Baron Ogmore
- :David Rees (British cross-country skier)
- :David Richards (footballer, born 1910)
- :David Richards (rugby union, born 1999)
- :David Roberts (priest)
- :David Stephen Davies
- :David Thaxton
- :David Thomas (Dewi Hefin)
- :David Thomas (archdeacon of Cardigan)
- :David Thomas (archdeacon of Gower)
- :David Thomas (bishop)
- :David Thomas (composer)
- :David Thomas (field hockey)
- :David Thomas Davies
- :David Watcyn Morgan
- :David Waters (rugby union)
- :David Weatherley (rugby union)
- :David Weaver (rugby union)
- :David Williams (Archdeacon of St Davids)
- :David Williams (Methodist minister, born 1877)
- :David Williams (businessman, born 1969)
- :David Williams (historian)
- :David Williams (minister, born 1709)
- :David Williams (priest, born 1841)
- :David Williams (priest, born 1862)
- :David Yeoman
- :David Young (cleric)
- :Dawn Kurtagich
- :Ddol Uchaf
- :Dduallt
- :Dean of Llandaff
- :Deborah's Hole Camp
- :Deborah Evans-Quek
- :Deborah Kay Davies
- :Dechrau Canu, Dechrau Canmol
- :Decline and abolition of the poor law system
- :Dedwyddfa
- :Dee Valley Dragons
- :Dee Valley Way
- :Deep Sleep (hotel)
- :Deeside Consortium
- :Deeside Leisure Centre
- :Deeside Parkway railway station
- :Deeside Stadium
- :Deganwy Castle
- :Deio ab Ieuan Du
- :Denbigh, Ruthin and Corwen Railway
- :Denbigh, Ruthin and Vale of Clwyd Free Press
- :Denbigh Golf Club
- :Denbigh railway station
- :Denis Evans (rugby union)
- :Denis Reardon
- :Dennis Fowles
- :Dennis Heywood
- :Dennis Lambourne
- :Dennis Madden
- :Dennis Wight
- :Denzil Thomas
- :Deputy First Minister of Wales
- :Derek Howes
- :Derek Williams (art collector)
- :Derek Williams (footballer, born 1934)
- :Derfel Limestone
- :Deri, Caerphilly
- :Derlwyn, Ceredigion
- :Derrick Main
- :Derry Ormond
- :Derry Ormond railway station
- :Derwen
- :Derwen-fach Meadow
- :Derwen railway station
- :Derwenlas
- :Derwydd, Carmarthenshire
- :Derwydd Road railway station
- :Des Case
- :Des Greenslade
- :Devynock & Sennybridge railway station
- :Dewar Cup Aberavon
- :Dewi Bridges
- :Dewi Cross
- :Dewi Griffiths
- :Dewi Havhesp
- :Dewi Lake
- :Dewi Morgan
- :Dewi Sant Hospital
- :Deytheur Grammar School
- :Dic Aberdaron
- :Dic Jones
- :Dick Doncaster
- :Dick Finnigan
- :Dick Hosier
- :Dick Krzywicki
- :Dick Thomas (rugby league)
- :Dick Turner (footballer)
- :Dick Uzzell
- :Dick Wilcock
- :Dieulacres Chronicle
- :Diffwys
- :Diffwys West Top
- :Digain
- :Dihewyd
- :Dimmy Franks
- :Dinas, Gwynedd
- :Dinas Cromlech
- :Dinas Mawddwy
- :Dinas Rhondda
- :Dinas Rhondda railway station
- :Dindaethwy
- :Dinefwr Estate
- :Dingestow railway station
- :Dinieithon
- :Dinmael
- :Dinorwig
- :Disgwylfa Chapel
- :Disserth and Trecoed
- :District of Monmouth
- :Dmitri Arhip
- :Do not go gentle festival
- :Dogfan
- :Dol-gau
- :Dol-y-pandy
- :Dol Formation
- :Dolanog
- :Dolarddyn Crossing railway station
- :Dolau
- :Dolau railway station
- :Dolauhirion Bridge
- :Dolbenmaen
- :Dole, Ceredigion
- :Dolfach
- :Dolfor
- :Dolgarrog Railway
- :Dolgellau railway station
- :Dolgerdd
- :Dolgoch Falls
- :Dolgran
- :Dolhir Formation
- :Dollwen
- :Dolman Theatre
- :Dolserau Halt railway station
- :Dolwen railway station
- :Dolwyddelan railway station
- :Dolyhir
- :Dolyhir railway station
- :Domen Fawr, Tafolwern
- :Don Emery
- :Donald Farquharson (athlete)
- :Donna Edwards (actress)
- :Donna Rose (rugby union)
- :Doreen Jones
- :Doris Gubbins
- :Dorothy Summers (gymnast)
- :Dorrien Davies
- :Doug Curtin
- :Doug Rees (rugby union)
- :Dougie Oliver
- :Dovecote, Angle
- :Dowlais
- :Dowlais (High Street) railway station
- :Dowlais Cae Harris railway station
- :Dowlais Central railway station
- :Dowlais Top (LNWR) railway station
- :Dowlais Top railway station
- :Downs, Vale of Glamorgan
- :Dowrog Common
- :Dr Williams' School
- :Dragon's Eye (TV programme)
- :Dragon Radio
- :Drefach, Ceredigion
- :Drope
- :Drosgl
- :Dru yoga
- :Druid, Denbighshire
- :Druidston
- :Drum (Wales)
- :Drws-y-Nant
- :Drws-y-Nant railway station
- :Dryslwyn railway station
- :Duffryn Rhondda Halt railway station
- :Duhonw
- :Dulas, Anglesey
- :Dulas, Irfon
- :Dulas, Ithon
- :Dumbarton House School
- :Duncan Bush
- :Duncan Evans
- :Dunoding
- :Dwrhyd Pit
- :Dwyfan and Dwyfach
- :Dwyfor
- :Dwygyfylchi
- :Dwyran
- :Dwyran Rural District
- :Dwyriw
- :Dwywe
- :Dyfed Archaeological Trust
- :Dyfed County Council
- :Dyfed Steels
- :Dyfedeg
- :Dyffryn-bern
- :Dyffryn Ardudwy railway station
- :Dyffryn Arth
- :Dyffryn Cellwen
- :Dyffryn Cennen
- :Dyffryn Clwyd
- :Dyffryn Gwaun
- :Dyfi National Nature Reserve
- :Dyfi hills
- :Dyfnan
- :Dyl Harris
- :Dylan Hughes
- :Dylan Moss
- :Dylan Thomas Theatre
- :Dyserth Quarry Limestone
- :Dyserth Waterfall
- :Dyserth railway station
- :Dysgedydd y Plant
- :Dà Mhìle Distillery
- :Dôl-y-bont
- :E. D. Jones
- :Earlswood, Monmouthshire
- :East Aberthaw Coast
- :East Glamorgan General Hospital
- :East Mouse
- :East Orchard Castle
- :Eastside, Swansea
- :Ebbw Vale North
- :Ebbw Vale South
- :Ebbw Valley Walk
- :Eddie Avoth
- :Eddie Beynon
- :Eddie Dowdall
- :Eddie Jenkins
- :Eddie Lawrence (footballer)
- :Edeirnion
- :Edern, Gwynedd
- :Edling
- :Edmund Birkhead
- :Edmund Howell
- :Edmund Meyrick (archdeacon of Bangor)
- :Edmund Morgan (of Llandaff)
- :Education Workforce Council
- :Education administration in the United Kingdom
- :Edward Bassenet
- :Edward Bevan (bishop)
- :Edward Bowen (footballer, born 1858)
- :Edward Cadwaladr
- :Edward Cresset
- :Edward Dafydd
- :Edward Dodd (police officer)
- :Edward Edwards (archdeacon of Brecon)
- :Edward Evans (poet)
- :Edward Evelyn (footballer)
- :Edward Gamage
- :Edward Jenkins (priest)
- :Edward Lincoln Lewis
- :Edward Morris (footballer)
- :Edward Owen (priest)
- :Edward Parry (preacher and poet)
- :Edward Pugh (artist)
- :Edward Roberts (footballer)
- :Edward Roberts (priest)
- :Edward Shaw (footballer)
- :Edward Talley (priest)
- :Edward Taylor Jones
- :Edward Tegla Davies
- :Edward Vaughan (Welsh priest)
- :Edward Welch (architect)
- :Edwin Davies (publisher)
- :Edwin Humphreys
- :Edwin James (footballer)
- :Edwin Williams (footballer)
- :Edwin ap Hywel
- :Edwina McGrail
- :Edwinsford
- :Efail Isaf
- :Efail Isaf railway station
- :Efailnewydd
- :Efan Daniel
- :Efenechtyd
- :Efrydiau Athronyddol
- :Egerton Grey Country House Hotel
- :Eglwys Fach
- :Eglwys Newydd Church
- :Eglwys Sant Ioan, Carmarthen
- :Eglwyscummin
- :Eifion Evans (archdeacon of Cardigan)
- :Eigion
- :Eigron
- :Eiludd Powys
- :Einion Wan
- :Einion Yrth ap Cunedda
- :Einion ap Gwalchmai
- :Einion ap Gwgon
- :Einir Jones
- :Eirian Williams
- :Eirias Park
- :Eirug Wyn
- :Eirwyn George
- :Eisingrug
- :Eisteddfa Gurig
- :Elaine Hugh-Jones
- :Elaine Morgan (singer)
- :Elan Valley Railway
- :Elan Village
- :Eldra
- :Eleanor Coster
- :Elen Rhys
- :Eleri Earnshaw
- :Eleri Mills
- :Elfed Evans
- :Elidir Sais
- :Eliezer Griffiths
- :Elim, Anglesey
- :Elin's Tower
- :Elin Harlow
- :Elinor Gwynn
- :Elisabeth Jones
- :Eliseus Williams
- :Eliza Constantia Campbell
- :Elizabeth Anesta Sewell
- :Elizabeth Jane Lloyd, Mrs Louis Jones
- :Elizabeth Vaughan
- :Ella Powell
- :Ellis Bevan
- :Ellis Cadwaladr
- :Ellis Davies (priest)
- :Ellis Evans (priest)
- :Ellis Griffith (priest)
- :Ellis Mee
- :Ellis Shipp (rugby union)
- :Ellis Thomas Davies
- :Elms Bridge Halt railway station
- :Elvet Collins
- :Elvet Hundred
- :Elvis Rock
- :Elwyn John
- :Elwyn Roberts
- :Ely Rangers A.F.C.
- :Elysian Grove
- :Emlyn A. G. Watkins
- :Emma Jones (footballer, born 1994)
- :Emrys Ellis
- :Emrys Hughes (rugby league)
- :Emrys Roberts (poet)
- :Emsger
- :Emyr Evans
- :Emyr Llywelyn
- :Emyr Rowlands
- :Ena Thomas
- :Engedi, Anglesey
- :Engineering Education Scheme Wales
- :Englynion Gwydion
- :Englynion y Clywaid
- :Enid Luff
- :Enid Morgan
- :Ennal's Point
- :Enoch Jenkins
- :Enoder
- :Enodoc
- :Environment Wales
- :Environmental issues in Wales
- :Ephraim Williams (footballer)
- :Epynt Way
- :Eric Roberts (bishop)
- :Eric St Johnston
- :Eric Sunderland
- :Erin Vaughan
- :Ernest Evans (priest)
- :Ernest Leigh
- :Ernest Morgan (architect)
- :Ernest Thomas Bush
- :Ernie Bowdler
- :Ernie Jones (footballer, born 1920)
- :Ernie Morley
- :Ernie Walley
- :Erw y Ddafad-ddu
- :Erwood
- :Escape into the Park
- :Esgairgeiliog
- :Esgeiriau Gwynion
- :Esgyrn Bottom
- :Esmé Kirby
- :Esther Lewis (missionary)
- :Estrildis
- :Esyllt Harker
- :Ethan Lloyd
- :Ethyllt ferch Cynan
- :Etna Park
- :Eubule Thelwall (academic, died 1727)
- :Eurgrawn Wesleyaidd
- :Euroswydd
- :Evan Daniel
- :Evan Davies (Calvinistic Methodist minister)
- :Evan Davies (Independent minister)
- :Evan Davies (almanac-maker)
- :Evan Davies (educationalist)
- :Evan Jenkins (footballer)
- :Evan Jones (footballer)
- :Evan Lloyd (rugby union, born 2000)
- :Evan Owen Allen
- :Evan Roberts (botanist)
- :Evan Thomas (priest)
- :Evan Watkins
- :Evan Yardley
- :Evans & Williams A.F.C.
- :Ewan Rosser
- :Ewart Lewis
- :Eyarth railway station
- :Ezer Griffiths
- :F. J. Gillies
- :FA Women's National League South
- :FC Queens Park
- :Fabian's Bay
- :Faenor, Ceredigion
- :Faerdrefawr
- :Fair Trade Wales
- :Fairbourne railway station
- :Fairwater railway station
- :Fairwood Common
- :Fairwood Park Golf Course
- :Falcondale
- :Falcondale Lake
- :Fan Frynych
- :Fanny Bulkeley-Owen
- :Farewell Rock
- :Farmers' Union of Wales
- :Farrar Road Stadium
- :February 1866 Brecon by-election
- :Federation Day
- :Federation of Disability Sport Wales
- :Federation of Welsh Anglers
- :Fedw Fawr
- :Felicity Evans
- :Felin-Wnda
- :Felin-fach
- :Felin Fach Meadows, Cwmgwili
- :Felin Fawr Slate Works
- :Felin Fran Halt railway station
- :Felin Hen Halt railway station
- :Felin Llwyngwair
- :Fenn's Bank railway station
- :Fennant Road Halt railway station
- :Ferndale railway station
- :Fernhill, Rhondda Cynon Taf
- :Fernhill (band)
- :Fernhill railway station
- :Ferryside railway station
- :Ffa Coffi Pawb
- :Ffair Fach Railway Cutting and River Section
- :Ffair Rhos
- :Ffairfach railway station
- :Ffarmers
- :Fferam
- :Fferam Uchaf
- :Ffernfael ab Idwal
- :Ffernfael ap Meurig
- :Ffernfael ap Tewdwr
- :Ffestiniog Flags
- :Ffestiniog Travel
- :Ffinian
- :Fflaps
- :Fforestganol a Chwm Nofydd
- :Ffos-y-ffin
- :Ffoshelyg
- :Ffostrasol
- :Ffostrasol Wanderers A.F.C.
- :Ffransis G. Payne
- :Ffridd Gate railway station
- :Ffrith
- :Ffrith railway station
- :Ffronfraith Halt railway station
- :Ffrwd Fawr Waterfall
- :Ffynnon-ddrain
- :Ffynnon-oer
- :Ffynnon Beuno and Cae Gwyn Caves
- :Ffynnon Lloer
- :Ffynnongroew
- :Ffynone House School
- :Fideo 9
- :Fields Park A.F.C.
- :Fields Park Pontllanfraith A.F.C.
- :Filco Foods
- :Firing Line: Cardiff Castle Museum of the Welsh Soldier
- :Fishguard Folk Festival
- :Fishguard Lifeboat Station
- :Fishing industry in Wales
- :Five Roads
- :Fleur-de-Lis Platform railway station
- :Flint Mountain
- :Flint Mountain F.C.
- :Flintshire Constabulary
- :Flintshire Historical Society journal
- :Flintshire Observer
- :Foel-goch
- :Foel Boeth
- :Foel Cedig
- :Foel Cwm Sian Llŵyd
- :Foel Fenlli
- :Foel Formation
- :Foel Goch (Arenigs)
- :Foel Goch (Hirnant)
- :Foel Grach
- :Foel Gron
- :Foel Hafod-fynydd
- :Foel Penolau
- :Foel Rhudd
- :Foel Wen South Top
- :Foelallt
- :Foelgastell
- :Food Industry Centre
- :Forden United F.C.
- :Forden railway station
- :Foresthall House
- :Forestry in Wales
- :Forge, Powys
- :Forgotten Landscapes Project
- :Former Vicarage, Blaenau Ffestiniog
- :Foryd Bay
- :Foryd Pier railway station
- :Fouke Salisbury
- :Fountain Bridge Halt railway station
- :Four Crosses, Llandysilio
- :Four Crosses F.C.
- :Four Crosses railway station
- :Four Mile Bridge
- :Foxhall, Pembrokeshire
- :Foxhall Newydd
- :Francesca Rhydderch
- :Francis Lloyd (died 1799)
- :Francis Lloyd (priest)
- :Frank Atherton
- :Frank Davies (footballer, born 1903)
- :Frank Jenkins (priest)
- :Frank Scrine
- :Frankie Jones (gymnast)
- :Frazier Climo
- :Fred Cook (Welsh footballer)
- :Fred Dewey (footballer)
- :Fred Godfrey (songwriter)
- :Fred Hole
- :Fred Jones (footballer, born 1909)
- :Fred Jones (footballer, born 1938)
- :Fred Kelly (footballer)
- :Fred Perry (boxer)
- :Fred Secombe
- :Freddie John
- :Freddie Smart
- :Freddy Morgan
- :Frederic Edmondes
- :Frederick Green (footballer)
- :Frederick Hughes (footballer)
- :Frederick Jones (footballer)
- :Frederick Rees
- :Frederick Talbot
- :Frederick Worsley
- :Freshers (British TV series)
- :Friog
- :Fron, Powys
- :Frongoch railway station
- :Furnace, Carmarthenshire
- :Furnace, Ceredigion
- :Gabalfa railway station
- :Gadfa
- :Gaer, Newport
- :Gaer (Black Mountains)
- :Gaer Fawr, Llanilar
- :Gaer Wood
- :Gaer hillfort, Trellech
- :Gaerllwyd
- :Gaerwen
- :Gaerwen railway station
- :Galanas
- :Gallt Llanerch - Coed Gelli-deg
- :Gallt y Daren
- :Gallt yr Ogof
- :Galltfaenan Hall
- :Garan Croft
- :Garden City, Flintshire
- :Garden Village, Swansea
- :Garden Village, Wrexham
- :Gareth Chapman
- :Gareth Coppack
- :Gareth Davies (Welsh politician)
- :Gareth Davies (cricketer)
- :Gareth Griffiths (rugby union)
- :Gareth Jones (rugby union, born 1975)
- :Gareth Knott
- :Gareth Lewis
- :Gareth Milton
- :Gareth Pierce
- :Gareth Roberts (co-driver)
- :Gareth Thomas (rugby union, born 1993)
- :Gareth Williams (British musician)
- :Garn-yr-Erw railway station
- :Garn Boduan
- :Garnant railway station
- :Garndiffaith
- :Garndiffaith railway station
- :Garndolbenmaen
- :Garnedd-Wen Formation
- :Garnedd Goch
- :Garnedd Ugain
- :Garneddwen
- :Garneddwen Halt railway station
- :Garnswllt
- :Garreg Lwyd (Black Mountain)
- :Garreg Lwyd (Rhayader)
- :Garrison Chapel
- :Garth, Ceredigion
- :Garth, Powys
- :Garth Bank Quarry
- :Garth and Van Road railway station
- :Garth railway station (Powys)
- :Gary Jones (rugby union)
- :Garyn Lucas
- :Garyn Phillips
- :Gatewen Halt railway station
- :Gatewen Marsh
- :Gathering Day
- :Gau Graig
- :Gavin Jones (squash player)
- :Gelert's Farm Halt railway station
- :Gelert (company)
- :Gelli Bridge
- :Gelli Formation
- :Gellifor
- :Gelligaer
- :Gelligaer Urban District Council election results, 1909–1939
- :Gelligroes Mill
- :Gellilydan
- :Gendros
- :GeoMôn
- :Geoff Beckingham
- :Geoff Windsor-Lewis
- :Geoffrey Cutter
- :Geoffrey Evans (priest)
- :Geoffrey Glyn
- :Geoffrey Marshall (priest)
- :Geoffrey Thomas (academic)
- :George Ballsom
- :George Bennett (rugby)
- :George Bright (priest)
- :George Clark (priest)
- :George Evans (footballer, born 1935)
- :George F. Gibbs
- :George Glasscodine
- :George Godding
- :George Green (footballer, born 1912)
- :George Griffiths (footballer, born 1865)
- :George Gummer
- :George Henry Powell
- :George Higham
- :George Jones (footballer, born 1930)
- :George Makeston
- :George Owen (priest)
- :George Richards (Welsh footballer)
- :George Robinson (cricketer, born 1861)
- :George Savin
- :George Thomas (footballer, born 1857)
- :George Williams (footballer, born 1862)
- :George Williams (footballer, born 1879)
- :George Woosnam
- :George Young (rugby union)
- :Geraint Bowen (poet)
- :Geraint Lloyd Owen
- :Geraint Lövgreen
- :Geraint Watkins
- :Gerald Battrick
- :Gerald Williams (rugby union)
- :Gerrion Jones
- :Gerry Humphreys
- :Gerwyn Capon
- :Gethin Davies
- :Gething government
- :Giant's Dance
- :Giants Grave F.C.
- :Gibbonsdown
- :Gilbert Wright (priest)
- :Gilbert Wynne
- :Giles Langley
- :Gileston
- :Gilfach
- :Gilfach Fargoed railway station
- :Gilfach Goch RFC
- :Gilfach Goch railway station
- :Gilfachrheda
- :Gilli Davies
- :Gilwern
- :Gilwern Hill, Powys
- :Gladestry
- :Gladstone, Vale of Glamorgan
- :Glais (2nd) railway station
- :Glamorgan-Gwent Archaeological Trust
- :Glamorgan Bird Club
- :Glamorgan Constabulary
- :Glamorgan Monmouth and Brecon Gazette and Merthyr Guardian
- :Glamorgan Pottery
- :Glan-alaw
- :Glan-y-môr, Ceredigion
- :Glan-y-wern
- :Glan-yr-Afon Halt railway station
- :Glan-yr-afon, Bodffordd
- :Glan-yr-afon, Gwynedd
- :Glan Conwy
- :Glan Conwy F.C.
- :Glan Llyn Halt railway station
- :Glan Pibwr Stream Section
- :Glanamman railway station
- :Glandyfi
- :Glaneirw
- :Glangrwyney
- :Glanmule
- :Glannau Penmon
- :Glannau Porthaethwy
- :Glannau Rhoscolyn
- :Glanrhyd Halt railway station
- :Glantwymyn
- :Glanwydden
- :Glanymor
- :Glanyrafon, Ceredigion
- :Glanyrafon railway station
- :Glasbury-on-Wye railway station
- :Glascoed
- :Glascoed Halt railway station
- :Glasfynydd Forest
- :Glasgoed, Ceredigion
- :Glasgwm
- :Glasinfryn
- :Glaslyn
- :Glen George
- :Glenboi
- :Gloddaeth Hall
- :Glogue Halt railway station
- :Glyn Abbey railway station
- :Glyn Gething
- :Glyn Gower Formation
- :Glyn Hopkins
- :Glyn Jones (rugby league)
- :Glyn Llewellyn
- :Glyn Neath railway station
- :Glyn Tarell
- :Glynarthen
- :Glyncaled
- :Glyncoch
- :Glyncorrwg railway station
- :Glyndwr Hackett
- :Glyndyfrdwy railway station
- :Glynfach
- :Glynneath (electoral ward)
- :Glynrhonwy quarries
- :Glyntaff Halt railway station
- :Glyntraian
- :Godor North Top
- :Godre'r Graig
- :Godreaman Halt railway station
- :Goetre Fawr
- :Goewin
- :Goferydd
- :Gogarth railway station
- :Gogerddan
- :Gogoyan
- :Goitre Halt railway station
- :Golden Grove, Carmarthenshire
- :Golden Grove railway station
- :Golden Hill Platform railway station
- :Golfa railway station
- :Golud yr Oes
- :Golwg
- :Golwg360
- :Gomer Lloyd
- :Gordon Britton
- :Gordon James (priest)
- :Gordon Jones (footballer, born 1886)
- :Gordon MacWilliam
- :Gordon Phillips (priest)
- :Gordon Richards (footballer)
- :Gordon Wells
- :Goronwy Foel
- :Gors, Anglesey
- :Gorsedd, Flintshire
- :Gorseinon Hospital
- :Gorseinon railway station
- :Gorsgoch
- :Gorslas
- :Gorslwyd
- :Gorwel Owen
- :Govilon
- :Gower (magazine)
- :Gower College Swansea
- :Gower Explorer
- :Gowerton South railway station
- :Goytre
- :Goytre, Monmouthshire
- :Graham Bent
- :Graham Harcourt
- :Graham James Davies
- :Graham Jones (footballer, born 1949)
- :Graham Jones (rugby union)
- :Graham Morris
- :Graham Powell
- :Graham Sweet
- :Graham Wattley
- :Graig, Llanarmon-yn-Ial
- :Graig, Newport
- :Graig, Pontypridd
- :Graig Fawr
- :Graig Formation
- :Graig Syfyrddin
- :Graig Villa Dino F.C.
- :Graig quarry
- :Grange Albion F.C.
- :Grange University Hospital
- :Gray Hill, Monmouthshire
- :Gray Sandstone Group
- :Greal (Llangollen)
- :Greal y Corau
- :Great Britain Superficial Deposits Supergroup
- :Great Hamston
- :Great House, Laugharne
- :Great Nash
- :Gredifael
- :Green Grove, Ceredigion
- :Greenfield Valley Heritage Park
- :Greenhill, Swansea
- :Greenmeadow
- :Gregynog Festival
- :Gresford railway station
- :Griffith (name)
- :Griffith (surname)
- :Griffith Davies (poet)
- :Griffith George
- :Griffith Nanney
- :Griffith William Hughes
- :Grits (novel)
- :Groes, Port Talbot
- :Groesfaen Colliery Platform railway station
- :Groesffordd
- :Groesffordd Halt railway station
- :Groeslon
- :Grogg
- :Gronant
- :Gronant Dunes and Talacre Warren
- :Gronant Formation
- :Grovesend
- :Grovesend railway station
- :Gruffudd
- :Gruffudd Fychan I
- :Gruffudd Gryg
- :Gruffudd Hiraethog
- :Gruffudd Llwyd
- :Gruffudd ab Adda
- :Gruffydd Davies
- :Gruffydd II ap Madog, Lord of Dinas Bran
- :Gruffydd Robert
- :Gruffydd ab Owain
- :Gruffydd ap Madog Fychan
- :Gungrog
- :Gurthiern
- :Guttorm Gunnhildsson
- :Gutun Owain
- :Gwaenysgor
- :Gwalchmai ap Meilyr
- :Gwalia (newspaper)
- :Gwaun-Cae-Gurwen (electoral ward)
- :Gwaun Lydan
- :Gwaun y Llwyni
- :Gwehelog
- :Gwen Davies (editor)
- :Gwenafwy
- :Gwenffrwd, Aeron
- :Gwenffrwd, Towy
- :Gwern-y-Steeple
- :Gwernaffield with Pantymwyn
- :Gwernesney
- :Gwernogle
- :Gwernyfed
- :Gwernyfed High School
- :Gwernymynydd
- :Gwersyllt Foresters F.C.
- :Gwersyllt Hill Halt railway station
- :Gwilym Bradley
- :Gwilym R. Jones
- :Gwilym Wilkins
- :Gwion Hallam
- :Gwladys Evan Morris
- :Gwragedd Annwn
- :Gwrddelw
- :Gwredog
- :Gwrfoddw
- :Gwrgan Fawr
- :Gwrgi Garwlwyd
- :Gwrhai
- :Gwriad ap Merfyn
- :Gwyddelwern railway station
- :Gwyddfarch
- :Gwyddgrug
- :Gwyddyl Ffichti
- :Gwylog ap Beli
- :Gwyn Hughes Jones
- :Gwyn Morgan (writer)
- :Gwyn Morgans
- :Gwyn Williams (writer)
- :Gwyndodeg
- :Gwynedd Archaeological Trust
- :Gwynedd Council elections
- :Gwynedd Is Conwy
- :Gwynedd League
- :Gwynedd Lewis-Lingard
- :Gwynedd Uwch Conwy
- :Gwynfor Llewellyn
- :Gwynfor Williams
- :Gwynllwg
- :Gwynne Williams
- :Gwynno James
- :Gwynt y Môr
- :Gwys railway station
- :Gwytherin
- :Gwythyr ap Greidawl
- :Gyfeillon Platform railway station
- :Gyrn Moelfre
- :H. G. Nicholas
- :Hacio
- :Hadnock Halt railway station
- :Hafod Garregog National Nature Reserve
- :Hafodiwan
- :Hafodyrynys Platform railway station
- :Hafren
- :Hagan Evans
- :Halen Môn
- :Halfway tram stop (Great Orme)
- :Halkyn Common and Holywell Grasslands
- :Hanmer Mere
- :Hannah Keryakoplis
- :Harbourmaster Hotel
- :Harford Fountain
- :Harlech Dome
- :Harlech Grits Group
- :Harlech Military Railway
- :Harlech railway station
- :Harlequin Puppet Theatre
- :Harold Carpenter Lumb Stocks
- :Harold Charles
- :Harold Jenkins (footballer)
- :Harold Thomas (rugby, born 1914)
- :Harold Williams (priest, died 2004)
- :Harper's Grove – Lord's Grove
- :Harri Deaves
- :Harri Doel
- :Harri Millard
- :Harri O'Connor
- :Harriet Jones (swimmer)
- :Harrison Bright
- :Harrison Walsh
- :Harry Craven Williams
- :Harry Fry (rugby union)
- :Harry Griffiths (footballer, born 1931)
- :Harry Hibbott
- :Harry Hollis
- :Harry Lewis (footballer, born 1910)
- :Harry Millership
- :Harry Parr-Davies
- :Harry Parry
- :Harry Toft
- :Harry Trainer
- :Harvey Rew
- :Havens Head Retail Park
- :Haverford Formation
- :Haverford Mudstone
- :Haverfordwest & Milford Haven Telegraph
- :Haverfordwest Airport
- :Haverfordwest High VC School
- :Haverfordwest Priory
- :Haverfordwest RFC
- :Haverfordwest railway station
- :Hawarden Bridge
- :Hawarden Bridge railway station
- :Hawarden Castle (medieval)
- :Hawen
- :Hawthorn, Rhondda Cynon Taf
- :Hawthorn Greyhound Track
- :Hawthorn High School
- :Hawthorn House, Menai Bridge
- :Hay-on-Wye railway station
- :Hay Bluff
- :Hay Urban District
- :Haydn Davies (rugby union)
- :Haydn Mainwaring
- :Haydn Morris
- :Hayley Stadium
- :Hazel Brunker
- :Headquarters Wales
- :Health in Wales
- :Healthcare Inspectorate Wales
- :Heart North Wales Coast
- :Heartsease, Knighton
- :Hebron, Anglesey
- :Heddiw (magazine)
- :Hefeydd
- :Hells Mouth Grits
- :Hen-allt Common
- :Hen Bentref Llandegfan
- :Henblas, Anglesey
- :Henborth
- :Hendre, Anglesey
- :Hendre-Rhys
- :Hendre (Bangor electoral ward)
- :Hendre Bach
- :Hendy
- :Hendy RFC
- :Heneglwys
- :Henfynyw
- :Heniarth railway station
- :Henllan, Ceredigion
- :Henllanfallteg
- :Henllys, Ceredigion
- :Henllys, Torfaen
- :Henry Adams (MP)
- :Henry Bould
- :Henry Brinley Richards
- :Henry Church Jones
- :Henry Davies (Baptist minister)
- :Henry Edwards (footballer)
- :Henry FitzMiles
- :Henry Foulkes
- :Henry Honore
- :Henry Jones (lawyer)
- :Henry Kennedy (architect)
- :Henry Lynch Blosse
- :Henry Maurice (minister)
- :Henry Morgan (priest)
- :Henry Naunton Davies
- :Henry Richards (British Army officer)
- :Henry Roxby Benson
- :Henry Sabine
- :Henry Stewart (archdeacon of Brecon)
- :Henry Walter (priest)
- :Henry de Winton
- :Henryd
- :Henwg
- :Heol-y-Cyw
- :Heol Senni
- :Heolgerrig
- :Heolgerrig Halt railway station
- :Herbert Cory
- :Herbert Jones (footballer, born 1929)
- :Herbert Sisson
- :Here are Lovers
- :Herewald of Llandaff
- :Hermon, Anglesey
- :Herward Smithy
- :Hieracium attenboroughianum
- :High Cross, Newport
- :High Performance Computing Wales
- :High Shields railway station
- :High Tor Limestone
- :Highfield Road Halt railway station
- :Highmead
- :Highmead School
- :Hightown Halt railway station
- :Hilary Summers
- :Hilton Cardiff
- :Hirdre-Faig
- :Hirwaun Pond Halt railway station
- :His Majesty's Inspectorate of Constabulary and Fire & Rescue Services
- :Historia Gruffud vab Kenan
- :History of NHS Wales
- :History of the harp in Wales
- :Hockey Driscoll
- :Hodge Bank
- :Holidaymaker (magazine)
- :Holland Arms railway station
- :Holly Bush railway station
- :Holly Holyoake
- :Holly Lawrence
- :Holly Williams (writer)
- :Hollybush
- :Holt, Wrexham
- :Holton, Vale of Glamorgan
- :Holway, Flintshire
- :Holy Trinity Church, Greenfield
- :Holy Trinity Church, Penrhos
- :Holy Trinity Church, Trefnant
- :Holyhead Admiralty Pier railway station
- :Holyhead Golf Club
- :Holyhead TMD
- :Holyhead Urban District
- :Holywell Golf Club
- :Holywell Junction railway station
- :Holywell Rural District
- :Holywell Town railway station
- :Holywell Workhouse Chapel
- :Homagnostus
- :Honddu Isaf
- :Hook Wood
- :Hope, Flintshire
- :Hope & Pen-y-ffordd railway station
- :Hope Exchange railway station
- :Horace Blew
- :Horace Debenham
- :Horace Phillips (rugby union)
- :Horeb, Carmarthenshire
- :Horseshoe Pass
- :Horton Beach
- :Household Music: Three Preludes on Welsh Hymn Tunes
- :Howel Davies
- :Howel Samuel
- :Howell Davies (bishop)
- :Howell Davies (rugby union, born 1959)
- :Howell Gwynne (MP)
- :Hubert Hughes (priest)
- :Hugh Arfon Evans
- :Hugh Bellot
- :Hugh Emyr Davies
- :Hugh Evans (priest)
- :Hugh Holbeche
- :Hugh Iorys Hughes
- :Hugh Jones (archdeacon of St Asaph)
- :Hugh Jones (footballer)
- :Hugh Meikle
- :Hugh Morgan-Owen
- :Hugh Nanney
- :Hugh Pugh (priest)
- :Hugh Pugh (sailor)
- :Hugh Williams-Jones
- :Hugh Williams (of Chester)
- :Hugh Williams (priest)
- :Hughe Hughes
- :Hughley Shale
- :Humffrey Davies
- :Humfrey Edwards
- :Hunts Bay
- :Hunts Bay Oolite
- :Huntsman's Leap
- :Huw Cadwaladr
- :Huw Jones (bishop)
- :Huw Stephens
- :Huw Sutton
- :Huws Gray
- :Hychddwn
- :Hyddwn
- :Hyfaidd ap Bleddri
- :Hywel Coetmor
- :Hywel Davies (broadcaster)
- :Hywel Davies (footballer)
- :Hywel Davies (jockey)
- :Hywel Foel ap Griffri ap Pwyll Wyddel
- :Hywel Teifi Edwards
- :Hywel ab Edwin
- :Hywel ab Owain
- :Hywel ap Caradog
- :Hywel ap Rhys (Glywysing)
- :I. D. Ffraid
- :Iago ab Idwal ap Meurig
- :Ial
- :Ian Boobyer
- :Ian Capon
- :Ian Eidman
- :Ian Flanagan
- :Ian Hutchinson (cricketer)
- :Ian Jones (curler)
- :Ian Jones (rugby union, born 1940)
- :Ian Roberts (footballer, born 1961)
- :Ian Robinson (rugby union)
- :Ian Sturrock
- :Ian Williams (speedway rider)
- :Ibiza, Ibiza
- :Iddog ap Mynio
- :Idole
- :Idris Jones
- :Idris Towill
- :Idris Williams (Welsh footballer)
- :Idwal ap Meurig
- :Iefan ab Owain Gwynedd
- :Iestyn Harris (rugby union, born 1998)
- :Iestyn Hopkins
- :Iestyn Rees
- :Ieuaf
- :Ieuan Ddu ap Dafydd ab Owain
- :Ieuan Lewis
- :Ieuan Owen
- :Ieuan Rhys Williams
- :Ieuan ab Owain Glyndŵr
- :Ieuan ap Gruffudd Leiaf
- :Ieuan ap Tudur Penllyn
- :Ifan Phillips
- :Ifor Pritchard
- :Ifor Williams Trailers
- :Ilar Thomas
- :Illustrated Usk Observer
- :Iltid Nicholl
- :Immanuel Feyi-Waboso
- :Imperial Gazetteer of England and Wales
- :Import of Live Fish (England and Wales) Act 1980
- :In Bloom (Neck Deep song)
- :Incline Top railway station
- :Inexus
- :Inter European Airways
- :International Business Wales
- :Ioan Croft
- :Ioan Davies
- :Ioan Evans (rugby union)
- :Ioan Nicholas
- :Ioan Tegid
- :Iona Banks
- :Iona Jones
- :Iori Jenkins
- :Iorwerth (Bishop of St Davids)
- :Iorwerth Beli
- :Iorwerth Drwyndwn
- :Iorwerth Herbert
- :Iorwerth Hirflawdd
- :Iorwerth Hughes
- :Iron Tram Bridge, Robertstown
- :Isaac Singleton (priest)
- :Isallt Bach
- :Isfael
- :Islwyn Davies
- :Islwyn Davies (priest)
- :Islwyn John
- :Ithel Davies
- :Ithel Hael
- :Ithel ap Morgan
- :Ivor Davies (rugby, born 1906)
- :Ivor Jones
- :Ivor Philips
- :Ivor Powell (evangelist)
- :Ivor Thomas (trade unionist)
- :Ivor Vice
- :Iwan Shenton
- :Iwcs a Doyle
- :Izaak Duffy
- :J. Crichton & Company
- :J. Meirion Lloyd
- :Jabez Evans
- :Jac Morgan
- :Jac Price
- :Jack Bowdler
- :Jack Butler (footballer, born 1868)
- :Jack Edwards (footballer, born 1876)
- :Jack Fairweather (writer)
- :Jack Garner (footballer)
- :Jack Humphreys
- :Jack Jenkins (Welsh footballer)
- :Jack Jones (1920s Welsh footballer)
- :Jack Mates
- :Jack Scriven
- :Jack Smith (footballer, born 1911)
- :Jack Thomas (bishop)
- :Jack Vale (footballer, born 2001)
- :Jackie Price (bobsleigh)
- :Jacob Beetham
- :Jacob Davies
- :Jacob Ifan
- :Jacob Rees (architect)
- :James Allan Smith
- :James Allen (priest)
- :James Bevan Bowen (MP)
- :James Botham
- :James Buckley (priest)
- :James Childs Gould
- :James Conway Brown
- :James Crane (police officer)
- :James Crisp (cricketer)
- :James Davies (Baptist minister)
- :James Davies (Iago ap Dewi)
- :James Davies (footballer, born 1845)
- :James Davies (politician)
- :James Davies (schoolmaster)
- :James Davies Lewin
- :James Dickson Innes
- :James Evans (Welsh politician)
- :James Fender
- :James Jubilee Young
- :James Kitchener Davies
- :James Kyriakides
- :James Langworth
- :James Lloyd (footballer)
- :James Milo Griffith
- :James Morris (footballer, born 1864)
- :James Phillips (MP)
- :James Pyke Thompson
- :James Ratti
- :James Sheekey
- :James Sommerin
- :James Trainer
- :James Vincent (priest, born 1718)
- :James Vincent (priest, born 1792)
- :James Williams (archdeacon of Wrexham)
- :James Wilson (footballer, born 1989)
- :Jamie Hill (rugby union)
- :Jamie Meikle
- :Jamie Owen
- :Jamie Slater
- :Jane Richmond
- :Janet Ackland
- :Janet Davies (politician)
- :Janet Lewis-Jones
- :Jason Harries
- :Jason Harrold
- :Jasper Rees
- :Jay Gibbs
- :Jean Earle
- :Jeff Evans (umpire)
- :Jeff Global's Global Probe
- :Jeff Parton
- :Jeffrey Jones (footballer)
- :Jeffreyston Pastures
- :Jenkin Jones (captain)
- :Jenner Park Stadium
- :Jennifer Davies
- :Jenny Hawkins
- :Jenny Rathbone
- :Jeremy Pugh
- :Jeremy Winston
- :Jermaine Asare
- :Jersey Marine
- :Jersey Marine railway station
- :Jesse Meredith
- :Jesse Williams (footballer, born 1903)
- :Jessica Hogg
- :Jevon Groves
- :Jewin Welsh Presbyterian Chapel
- :Jim Edwards (footballer, born 1874)
- :Jim Shanklin
- :Jim Vaughan
- :Jimmy Cardno
- :Jimmy Ithell
- :Jimmy Jones (footballer, born 1895)
- :Joan Osborne (bowls)
- :Joanne Muggeridge
- :Joanne Owen
- :Joe Cowell
- :Joe Goodchild
- :Joe Hawkins
- :Joe Lewis (footballer, born 1999)
- :Joe Morgan (badminton)
- :Joe Roberts (rugby union)
- :Joe Walsh (footballer, born 1992)
- :Joel James (politician)
- :Johanne Brekke
- :John "Wynn" ap Maredudd
- :John Abel (minister)
- :John Adams (Pembroke MP)
- :John Arthur Price
- :John Baker (died 1544)
- :John Batchelor (politician)
- :John Belcher (Methodist preacher)
- :John Bird (artist)
- :John Blackwall
- :John Blackwell (Alun)
- :John Blodwell
- :John Bolton (Haverfordwest MP)
- :John Bryant (harpist)
- :John Bufton
- :John C. Clarke
- :John Cadvan Davies
- :John Cawston
- :John Cayo Evans
- :John Charlton, 2nd Baron Charlton
- :John Charlton, 3rd Baron Charlton
- :John Charlton, 4th Baron Charlton
- :John Clegge
- :John Cockrill (politician)
- :John Crichton-Stuart, 4th Marquess of Bute
- :John Crompton (MP)
- :John Daniel (printer)
- :John Daniel Davies
- :John Dassy
- :John Davies (Methodist minister, born 1823)
- :John Davies (Taliesin Hiraethog)
- :John Davies (archdeacon of Wrexham)
- :John Davies (author)
- :John Davies (composer)
- :John Davies (footballer, born 1856)
- :John Davies (missionary)
- :John Davies (printer and journalist)
- :John Davies (steeplechase runner)
- :John Davies of Hereford
- :John De la Bere
- :John Du Buisson
- :John Edward Davies
- :John Edward Jones (Welsh politician)
- :John Edwards (1747–1792)
- :John Edwards (MP for Denbighshire)
- :John Edwards (archdeacon of St Asaph)
- :John Elias Davies
- :John Evan Davies
- :John Evans (Haverfordwest MP)
- :John Evans (archdeacon of Llandaff)
- :John Evans (footballer, born 1859)
- :John Eyton-Jones
- :John Fulham
- :John Funnell
- :John Gilbert (Bishop of St Davids)
- :John Gill (actor)
- :Draft:John Goodwin (sport shooter)
- :John Grantley Cooper
- :John Griffiths (archdeacon of Llandaff)
- :John Gruffith
- :John Gwynoro Davies
- :John Hanbury (1744–1784)
- :John Harris (bishop)
- :John Harris (priest)
- :John Harris Jones
- :John Haydn Davies
- :John Hensleigh Allen
- :John Hill (police officer)
- :John Holdsworth (priest)
- :John Hughes (ceramicist)
- :John Hughes (footballer, born 1877)
- :John Hunt (curler)
- :John Ingleby (bishop)
- :John Iorweth Hughes
- :John James (archdeacon of Llandaff)
- :John James Williams (poet)
- :John Jeffreys (1706–1766)
- :John Jeffreys (died 1715)
- :John Jenkins (Gwili)
- :John Jones (Ivon)
- :John Jones (archdeacon of Bangor)
- :John Jones (archdeacon of St Asaph)
- :John Jones (bishop)
- :John Jones (dean of Bangor)
- :John Jones (footballer, born 1860)
- :John Kelt Edwards
- :John Lawrence (musician)
- :John Lewis (dean of Llandaff)
- :John Lewis Owen
- :John Lloyd (Bishop of St Davids)
- :John Lloyd (MP for Denbighshire)
- :John Lloyd (archdeacon of Montgomery)
- :John Lloyd (bishop of Swansea)
- :John Lloyd (cricketer)
- :John Lloyd (vicar of Cilcain)
- :John Lomas (bishop)
- :John Lougher
- :John Luntley
- :John Marshall (bishop)
- :John Matthias (footballer)
- :John Meaney (footballer)
- :John Meirion Morris
- :John Meyrick
- :John Meyrick (politician)
- :John Morgan (Bishop of St Davids)
- :John Morgan (archdeacon of Bangor)
- :John Morgan (of Tredegar)
- :John Morgan Howell
- :John Morris (footballer, born 1873)
- :John Moulsdale
- :John Mulhall (gymnast)
- :John Mulvihill (rugby union)
- :John Myddelton
- :John Neal (Welsh footballer)
- :John Ogwen
- :John Ossian Davies
- :John Owen Vaughan
- :John Owen Williams (Pedrog)
- :John Park Davies
- :John Parker (cleric)
- :John Parry (editor)
- :John Parsons (footballer, born 1950)
- :John Paschal
- :John Perkins (rugby union)
- :John Pettigrew (businessman)
- :John Phillips (priest)
- :John Pook
- :John Poole-Hughes
- :John Pratt (archdeacon of St Davids)
- :John Prichard
- :John Probyn
- :John Pugh (priest)
- :John Pugh Pryse
- :John Pugsley (footballer)
- :John Quarre
- :John Rhys Davies (priest)
- :John Richards (Bishop of St Davids)
- :John Richardson (rugby union)
- :John Roach (footballer, born 1862)
- :John Roberts (Flint MP)
- :John Roberts (Vicar of Tremeirchion)
- :John Roberts (footballer, born 1857)
- :John Roberts (footballer, born 1858)
- :John Rogers (dean of Llandaff)
- :John Salesbury
- :John Salusbury (died 1578)
- :John Smith (archdeacon of Llandaff)
- :John Smith (bishop of Llandaff)
- :John Smith (footballer, born 1944)
- :John Sparkes
- :John Stanberry
- :John Stradling (priest)
- :John Summers & Sons
- :John Summers High School
- :John T. Pritchard
- :John Tapton
- :John Taylor (Welsh footballer)
- :John Thomas (priest, born 1736)
- :John Thomas (priest, born 1891)
- :John Trevelyan (chess player)
- :John Trevor (died 1410)
- :John Tripp (poet)
- :John Tudor (cyclist)
- :John Tyler (bishop)
- :John Vaughan (died 1804)
- :John Vaughan (footballer, born 1856)
- :John Wakeford (rugby union)
- :John Walters (priest and lexicographer)
- :John Warren (priest)
- :John White (Welsh lawyer)
- :John Williams (Oxford academic)
- :John Williams (dean of Llandaff)
- :John Williams (evangelical priest)
- :John Williams (rugby league, born 1907)
- :John Williams (schoolmaster, born 1760)
- :John Wogan
- :John Wyn ap Cadwaladr
- :John Wynne (1689–1718)
- :John Wynne (died 1689)
- :John Wynne Jones
- :John of Monmouth (bishop)
- :Johnny Rogers (rugby)
- :Johnstown, Wrexham
- :Jon Latimer
- :Jonathan Ceredig Davies
- :Jonathan Davies (Welsh priest)
- :Jonathan Denning
- :Jonathan Edwards (academic)
- :Jonathan Evans (rugby union)
- :Jonathan Lean
- :Jonathan Mason (rugby union)
- :Jonathan Tomlinson
- :Jonathan Worsley
- :Jordan Hart
- :Jordan Holt (footballer, born 1994)
- :Joseph Barnett
- :Joseph Coope-Franklin
- :Joseph Davies (magazine editor)
- :Joseph Hoare (Welsh academic)
- :Joseph Hudson Turner
- :Joseph Miles
- :Joseph Rogers (footballer)
- :Joseph Williams (footballer)
- :Josh Macleod
- :Josh Ralph (rugby league)
- :Josh Reynolds (rugby union)
- :Josh Thomas (rugby union)
- :Joshua Andrews
- :Joshua Milton
- :Journal of the Welsh Bibliographical Society
- :Jubilee Bridge (Queensferry)
- :Julie Murphy (singer)
- :Julie Thomas (bowls)
- :Justiciar of North Wales
- :Justin Kerrigan
- :Karl Johnson (actor)
- :Kate Eaves
- :Kate McNicol
- :Keiran Williams
- :Keith Hughes (rugby union)
- :Keith Maddocks
- :Keith Matthews (footballer)
- :Keith Povey
- :Keith Smalldon
- :Keith Tyte
- :Kelly-Louise Pesticcio
- :Kemsley Mathias
- :Ken Braddock
- :Ken Buffin
- :Ken Jones (footballer, born 1937)
- :Ken Thomas (trade unionist)
- :Ken Waters
- :Kenfig Hill railway station
- :Kenner Elias Jones
- :Kenneth Bowen (tenor)
- :Kenneth O. Morgan
- :Kenneth Sharpe
- :Keredic
- :Kerry F.C. (Wales)
- :Kerry Goulstone
- :Kerry branch line
- :Kerry railway station
- :Kevin Green (investor)
- :Kevin James (bowls)
- :Kevin O'Brien (rugby union coach)
- :Key Stage 5
- :Kezia Burrows
- :Kibbor
- :Kidwelly Flats Halt railway station
- :Kidwelly Industrial Museum
- :Kidwelly railway station
- :Kieran Hardy
- :Kilgerran Halt railway station
- :Kilgetty railway station
- :Killay railway station
- :Kilvrough Manor
- :King's Hall, Aberystwyth
- :King Edward VII Welsh National Memorial Association
- :Kingsland, Anglesey
- :Kingsley Whiffen
- :Kingsway Shopping Centre
- :Kinmel Bay
- :Kinmel Bay F.C.
- :Kinmel Bay and Towyn
- :Kinmel Camp Railway
- :Kinnerton, Powys
- :Kinnerton railway station
- :Kiran Carlson
- :Knighton Rural District
- :Knolton
- :Knyvett Crosse
- :Kristian Bell
- :Kylie Nolan
- :LGBTQ culture in Cardiff
- :Lampeter Museum
- :Lamphey Court
- :Lamphey Cricket Club Ground
- :Lamphey railway station
- :Lando Platform railway station
- :Landore Low Level railway station
- :Landore TMD
- :Landsker Borderlands Trail
- :Latalia Bevan
- :Latham Park
- :Laugharne Castle
- :Laugharne Weekend
- :Laura Hughes (weightlifter)
- :Laura May Walkley
- :Laurance Delaney
- :Lauren Townsend (footballer)
- :Lauren Wells (footballer)
- :Lauren Williams (taekwondo)
- :Laurence Philipps, 1st Baron Milford
- :Laurie Daniel
- :Law Council of Wales
- :Lawrence Bowen
- :Lawrence Byford
- :Lawrence Langner
- :Lawrence Thomas (priest)
- :Leaf Books
- :Leckwith
- :Leckwith, Cardiff
- :Lee Dainton
- :Lee Walker
- :Leeswood
- :Leeswood and Pontblyddyn
- :Leete Limestone
- :Legacy railway station
- :Leighton Alfred
- :Leighton Jenkins
- :Leighton Williams
- :Lemuel Mathews
- :Len Apsey
- :Len Cunningham
- :Len Orchard
- :Lengthsman
- :Lennon Greggains
- :Les Cartwright
- :Les Jones (Welsh footballer, born 1922)
- :Les Keen
- :Les Pearce (Welsh rugby)
- :Les Speed
- :Les Williams (Welsh footballer)
- :Letterston railway station
- :Leucarum
- :Level of Mendalgief
- :Levi Gibbon
- :Lewis Clarke (priest)
- :Lewis Davies (writer)
- :Lewis Jones (bishop)
- :Lewis Jones (politician)
- :Lewis Llewellyn
- :Lewis Mansel
- :Lewis Morgan (rugby union)
- :Lewis Pryce
- :Lewis Pugh Pugh
- :Lewis Thomas (bishop)
- :Lewis ab Owen ap Meurig
- :Lewistown, Bridgend
- :Lewistown F.C.
- :Lewistown Halt railway station
- :Lewys Glyn Dyfi
- :Lewys Twamley
- :Lex XI F.C.
- :Liam Belcher
- :Liam Williams (boxer)
- :Libanus, Powys
- :Libanus Chapel, Swansea
- :Libraries Connected
- :Lido Ground
- :Lilian Nicholas
- :Lily Woodham
- :Limeslade Bay
- :Lisa Peters
- :List and Index Society
- :List of Palmerston Forts around Milford Haven
- :List of family seats of Welsh nobility
- :Lister Tonge
- :Lisvane (CAC) Tennis Club
- :Lisvane Reservoir
- :Lisvane and Thornhill railway station
- :Little Mill, Monmouthshire
- :Little Mill Junction railway station
- :Little Ormes Head Quarry tramway
- :Liverpool Courier
- :Liverpool Daily Post
- :Liverpool Mercury
- :Lixwm
- :Liza Burgess
- :Llafar Halt railway station
- :Llafur
- :Llain-wen
- :Llain-y-gawsai
- :Llaingarreglwyd
- :Llaingoch
- :Llais (Wales)
- :Llais Y Wlad
- :Llampha
- :Llan, Powys
- :Llan Ddu Fawr
- :Llanaber
- :Llanaber railway station
- :Llanaelhaearn
- :Llanafan, Ceredigion
- :Llanallgo
- :Llanarmon, Gwynedd
- :Llanarmon Limestone
- :Llanarth, Ceredigion
- :Llanarth, Monmouthshire
- :Llanarthney
- :Llanarthney Halt railway station
- :Llanasa
- :Llanbabo
- :Llanbadarn Fynydd
- :Llanbadarn railway station
- :Llanbadarn y Garreg
- :Llanbadoc
- :Llanbadrig
- :Llanbadrig - Dinas Gynfor
- :Llanbeblig Book of Hours
- :Llanbedr, Vale of Grwyney
- :Llanbedr Airfield
- :Llanbedr railway station
- :Llanbedrgoch
- :Llanbedrgoch railway station
- :Llanberis railway station (London and North Western Railway)
- :Llanbister Road railway station
- :Llanbradach Quarry
- :Llanbradach and Pwllypant
- :Llanbradach railway station
- :Llanbrynmair railway station
- :Llancadle
- :Llancaiach
- :Llancaiach Colliery
- :Llancayo
- :Llandanwg
- :Llandanwg railway station
- :Llandarcy Platform railway station
- :Llandawke
- :Llanddarog
- :Llanddeiniolen
- :Llandderfel
- :Llanddeusant, Carmarthenshire
- :Llanddew
- :Llanddewi Rhydderch
- :Llanddewi Skirrid
- :Llanddewi Ystradenny
- :Llanddoged
- :Llanddona
- :Llanddona Common
- :Llanddowror
- :Llanddulas
- :Llanddulas Limestone and Gwrych Castle Wood
- :Llanddyfrwyr-yn-Edeligion
- :Llandecwyn
- :Llandecwyn railway station
- :Llandegla Forest
- :Llandegley
- :Llandegveth
- :Llandegwning
- :Llandeilo'r-Fan
- :Llandeilo Rural District
- :Llandeilo Urban District
- :Llandeilo railway station
- :Llandenny
- :Llandenny railway station
- :Llandevaud
- :Llandilo Bridge railway station
- :Llandinam railway station
- :Llandogo Halt railway station
- :Llandough, Llanfair
- :Llandough, Penarth
- :Llandovery railway station
- :Llandovery transmitting station
- :Llandrillo railway station
- :Llandrindod Wells Victorian Festival
- :Llandrinio
- :Llandrinio Road railway station
- :Llandudno Albion F.C.
- :Llandudno Junction TMD
- :Llandudno Pier Dolomite
- :Llandudno Urban District
- :Llandudno Victoria tram stop
- :Llandudwen
- :Llandulas railway station
- :Llandwrog
- :Llandybie
- :Llandybie railway station
- :Llandyfaelog
- :Llandyfaelog Fach
- :Llandyfaelog Tre'r-graig
- :Llandyfriog
- :Llandyfrydog
- :Llandygai
- :Llandygwydd
- :Llandysilio
- :Llandysiliogogo
- :Llandyssul railway station
- :Llanedi
- :Llanedwen
- :Llanegwad
- :Llaneilian
- :Llanelidan
- :Llanellen
- :Llanelli Online
- :Llanelli RFC 9–3 New Zealand
- :Llanelli Rural
- :Llanelli Talking Newspaper
- :Llanelli Town Council
- :Llanelli Waterside
- :Llanelltyd
- :Llanelly
- :Llanelly Formation
- :Llanelly House
- :Llanelwedd
- :Llanengan
- :Llanerchymedd F.C.
- :Llanerchymedd railway station
- :Llanerfyl
- :Llaneuddog
- :Llaneugrad
- :Llanfaelrhys
- :Llanfair, Gwynedd
- :Llanfair, Vale of Glamorgan
- :Llanfair-Mathafarn-Eithaf
- :Llanfair-ar-y-bryn
- :Llanfair-is-gaer
- :Llanfair-y-Cwmwd
- :Llanfair-yn-Neubwll
- :Llanfair-yng-Nghornwy
- :Llanfair Caereinion railway station
- :Llanfair Clydogau
- :Llanfair Kilgeddin
- :Llanfair Talhaiarn
- :Llanfairfechan Town F.C.
- :Llanfairfechan Urban District
- :Llanfairfechan railway station
- :Llanfallteg Track Section
- :Llanfalteg Halt railway station
- :Llanfaredd Halt railway station
- :Llanfarian
- :Llanfawr Mudstones
- :Llanfechain railway station
- :Llanfflewyn
- :Llanfihangel-uwch-Gwili
- :Llanfihangel-y-Pennant
- :Llanfihangel-y-Pennant, Dolbenmaen
- :Llanfihangel Aberbythych
- :Llanfihangel Bachellaeth
- :Llanfihangel Din Sylwy
- :Llanfihangel Glyn Myfyr
- :Llanfihangel Nant Brân
- :Llanfihangel Nant Melan
- :Llanfihangel Rhos-y-Corn
- :Llanfihangel Rhydithon
- :Llanfihangel Tor-y-Mynydd
- :Llanfihangel Ysgeifiog
- :Llanfihangel Ystrad
- :Llanfihangel yn Nhowyn
- :Llanfoist Fawr
- :Llanfor
- :Llanfrothen
- :Llanfrynach
- :Llanfugail
- :Llanfwrog, Anglesey
- :Llanfwrog, Denbighshire
- :Llanfyllin railway station
- :Llanfynydd railway station
- :Llanfyrnach railway station
- :Llangadog
- :Llangadog railway station
- :Llangadwaladr
- :Llangain
- :Llangammarch (parish)
- :Llangammarch Wells
- :Llangammarch railway station
- :Llangan
- :Llanganten
- :Llangar
- :Llangathen
- :Llangattock Lingoed
- :Llangedwyn Halt railway station
- :Llangefni Urban District
- :Llangeinor
- :Llangeinor railway station
- :Llangeinwen
- :Llangeler
- :Llangelynin railway station
- :Llangelynnin, Gwynedd
- :Llangennech RFC
- :Llangennith, Llanmadoc and Cheriton
- :Llangian
- :Llanglydwen railway station
- :Llangoed
- :Llangoed Common
- :Llangoed F.C.
- :Llangoedmor
- :Llangollen Advertiser
- :Llangollen Rural
- :Llangollen Rural District
- :Llangollen railway station
- :Llangors
- :Llangorwen
- :Llangovan
- :Llangower railway station
- :Llangristiolus
- :Llangua
- :Llangunllo
- :Llangunnor
- :Llangwnnadl
- :Llangwyfan, Anglesey
- :Llangwyllog
- :Llangwyllog railway station
- :Llangybi, Ceredigion
- :Llangybi, Gwynedd
- :Llangybi railway station (Ceredigion)
- :Llangybi railway station (Gwynedd)
- :Llangyfelach railway station
- :Llangynfelyn
- :Llangynhafal
- :Llangynin
- :Llangynllo railway station
- :Llangynog, Carmarthenshire
- :Llangynog railway station
- :Llangynwyd railway station
- :Llangynyw
- :Llangystennin
- :Llangywer
- :Llanhamlach
- :Llanharry railway station
- :Llanhennock
- :Llanhilleth railway station
- :Llanidloes High School
- :Llanidloes Without
- :Llanidloes railway station
- :Llaniestyn, Gwynedd
- :Llanilar
- :Llanion Halt railway station
- :Llanllawddog
- :Llanllechid
- :Llanllibio
- :Llanllowell
- :Llanllugan Abbey
- :Llanllwchaiarn, Ceredigion
- :Llanllwni
- :Llanllyfni
- :Llanllyfni F.C.
- :Llanllyfni lunula
- :Llanmiloe
- :Llanmorlais railway station
- :Llannefydd
- :Llannefydd F.C.
- :Llannerch
- :Llannerch railway station
- :Llannewydd
- :Llannon
- :Llannor
- :Llanover
- :Llanrhaeadr-yng-Nghinmeirch
- :Llanrhaiadr Mochnant railway station
- :Llanrhaiadr railway station
- :Llanrhidian Higher
- :Llanrhidian Lower
- :Llanrhuddlad
- :Llanrhyddlad
- :Llanrhystud
- :Llanrug United F.C.
- :Llanrumney United F.C.
- :Llanrwst Rural District
- :Llanrwst railway station
- :Llansadwrn
- :Llansadwrn, Anglesey
- :Llansamlet railway station (MR)
- :Llansanffraid Glyndyfrdwy
- :Llansannan
- :Llansannan F.C.
- :Llansannor
- :Llansantffraid, Ceredigion
- :Llansantffraid railway station
- :Llansawel
- :Llansilin Road railway station
- :Llansillin Rural District
- :Llansoy
- :Llanspyddid
- :Llansteffan
- :Llanstephan Cliffs
- :Llanstephan Halt railway station
- :Llantarnam
- :Llantilio Crossenny
- :Llantilio Pertholey
- :Llantrisant, Anglesey
- :Llantrisant, Monmouthshire
- :Llantrisant Common and Pastures
- :Llantrisant Fawr
- :Llantrisant RFC
- :Llantrisant rail accident
- :Llantrithyd
- :Llantwit Fardre railway station
- :Llantwit Major RFC
- :Llantysilio
- :Llanuwchllyn F.C.
- :Llanuwchllyn railway station
- :Llanvabon
- :Llanvair railway station
- :Llanvetherine
- :Llanvihangel-Ystern-Llewern
- :Llanvihangel Gobion
- :Llanvihangel Railway
- :Llanvihangel railway station
- :Llanwchaiarn, Ceredigion
- :Llanwenarth
- :Llanwenog
- :Llanwern Golf Club
- :Llanwern High School
- :Llanwern railway station
- :Llanwinio
- :Llanwnda, Gwynedd
- :Llanwnda railway station
- :Llanwnnen
- :Llanwnnog
- :Llanwonno
- :Llanwrda
- :Llanwrda railway station
- :Llanwrin
- :Llanwrtyd
- :Llanwrtyd railway station
- :Llanybydder railway station
- :Llanycefn railway station
- :Llanychan
- :Llanycil
- :Llanycrwys
- :Llanymawddwy
- :Llanynghenedl
- :Llanynys
- :Llanyrafon
- :Llawdden
- :Llawryglyn
- :Llay Bog
- :Llechfaen
- :Llechgynfarwy
- :Llechog
- :Llechwedd Du
- :Llechylched
- :Lledrod
- :Lledwigan
- :Llef
- :Llettum-ddu
- :Lletty Brongu railway station
- :Llety-wen
- :Lleufer
- :Llewellyn Turner
- :Llewelyn Davies (footballer)
- :Llewelyn Griffiths
- :Llewelyn Jones
- :Llewelyn Lewellin
- :Llewelyn Wynne Jones
- :Lleyn sheep
- :Llidiardau
- :Lligwy
- :Lligwy Bay
- :Llinos Medi
- :Lliswerry High School
- :Llithfaen
- :Lliwedd Bach
- :Lloc
- :Llong railway station
- :Lloyd George Avenue
- :Lloyd Jones (Welsh writer)
- :Lloyd Llewellyn-Jones
- :Llunwerth II
- :Llwchwr
- :Llwydcoed railway station
- :Llwydiarth
- :Llwydiarth-Esgob
- :Llwyfan Cerrig railway station
- :Llwyn
- :Llwyn Formation
- :Llwyncelyn, Rhondda Cynon Taf
- :Llwynda-Ddu Camp
- :Llwyngwern railway station
- :Llwyngwril railway station
- :Llwynhendy
- :Llwynmawr
- :Llwynypia railway station
- :Llwytmor
- :Llygad Gŵr
- :Llygad Llwchwr
- :Llyn Aled
- :Llyn Alwen
- :Llyn Arenig Fawr
- :Llyn Bochlwyd
- :Llyn Cwm Bychan
- :Llyn Cwm Llwch
- :Llyn Eiddwen
- :Llyn Fawr
- :Llyn Glangors
- :Llyn Gwernan
- :Llyn Gwynant
- :Llyn Llydaw
- :Llyn Llyffant
- :Llyn Nantlle Uchaf
- :Llyn Ogwen
- :Llyn Parc
- :Llyn Pencarreg
- :Llyn Trawsfynydd
- :Llyn Ty'n y Llyn
- :Llyn y Gafr Formation
- :Llynfaes
- :Llynfi Road
- :Llynoedd Ieuan
- :Llys Halt railway station
- :Llyswen
- :Llysworney
- :Llywarch Reynolds
- :Llywarch ap Hyfaidd
- :Llywel
- :Llywelyn Aurdorchog
- :Llywelyn Fawr ap Maredudd
- :Llywelyn Goch ap Meurig Hen
- :Llywelyn Williams
- :Llywelyn ap Dafydd
- :Llywelyn ap Madog
- :Llywelyn ap Maredudd
- :Llywernog
- :Lock, Hulme & Co.
- :Lockwood Morris & Co
- :Logau-Las
- :Loggerheads, Denbighshire
- :Login Halt railway station
- :London Welsh Amateur
- :Long Hole Cave
- :Long Mountain (Powys)
- :Lord Lieutenant of Clwyd
- :Lord Lieutenant of Mid Glamorgan
- :Lord Lieutenant of Powys
- :Lord Lieutenant of West Glamorgan
- :Lordship of Bromfield and Yale
- :Lordship of Gower
- :Lort baronets
- :Loss of right in English law
- :Loughor bridge
- :Louie Hennessey
- :Lower Brynamman
- :Lower Clydach River
- :Lower Machen
- :Lower Pontnewydd railway station
- :Lowri Roberts
- :Luc Evans
- :Luca Giannini
- :Lucas Cwmbran A.F.C.
- :Ludlow Rural District
- :Luentinum
- :Lukas Carey
- :Luke Davies (rugby union)
- :Luke Fletcher (politician)
- :Luke Ford (rugby union)
- :Luke Morgan (rugby union)
- :Luke Preston
- :Luke Price
- :Luke Scully
- :Luke Yendle
- :Lyn Davies (rugby union)
- :Lyn Perkins
- :Lyndon Simmonds
- :Lôn Eifion
- :Lôn Las Menai
- :Lôn Las Ogwen
- :M4 motorway Usk bridge
- :Mabon ap Gwynfor
- :Maches
- :Machynlleth F.C.
- :Madog Fychan
- :Madog II ap Gruffydd, Lord of Dinas Bran
- :Madog ap Gwallter
- :Madog ap Rhiryd
- :Maelgwn ab Owain Gwynedd
- :Maelog
- :Maelor Rural District
- :Maelor South
- :Maelrhys
- :Maen-y-groes
- :Maen Huail
- :Maen Madoc
- :Maenaddwyn
- :Maenclochog railway station
- :Maendy Quarry
- :Maenor
- :Maentwrog Road railway station
- :Maes-bangor
- :Maes-yr-Uchaf Wood
- :Maes Hiraddug
- :Maes Tegid
- :Maes y Dre Recreation Ground
- :Maes y Facrell National Nature Reserve
- :Maes y Grug
- :Maescar
- :Maesdu Park
- :Maespoeth Junction
- :Maesteg (Neath Road) railway station
- :Maesteg Castle Street railway station
- :Maestir
- :Maesybont
- :Maesycoed
- :Maesycrugiau railway station
- :Maesyprior
- :Magor Rural District
- :Magor railway station
- :Mahel of Hereford
- :Mai Davies
- :Main river
- :Maindee
- :Maindy
- :Mair Jones
- :Maisie Methuen
- :Maisie Potter
- :Mal Griffiths
- :Mal Lucas
- :Malcolm Dacey
- :Malcolm Hersee
- :Malcolm Squires
- :Mallt-y-Nos
- :Mamhilad
- :Mancot
- :Mandi Haswell
- :Mandinam a Coed Deri
- :Mandy Jones (politician)
- :Manod Mawr
- :Manod Mawr North Top
- :Manod railway station
- :Manon Lloyd
- :Manor House Wildlife Park
- :Manorbier railway station
- :Manordeilo
- :Manordeilo and Salem
- :Mansel Aylward
- :Manselton
- :Manwgan ap Selyf
- :Marc Limbert
- :Marc Wyatt
- :March 1888 Merthyr Tydfil by-election
- :March law (Anglo-Welsh border)
- :Marchlyn Mawr
- :Marchwiel Hall
- :Marchwiel railway station
- :Marco Loughran
- :Mardy, Monmouthshire
- :Mardy A.F.C.
- :Maredudd ab Owain Glyndŵr
- :Maredudd ab Owain ab Edwin
- :Maredudd ap Cynan ab Owain Gwynedd
- :Maredudd ap Gruffydd
- :Maredudd ap Llywelyn ap Maredudd ap Cynan
- :Maredudd ap Rhobert
- :Maredudd ap Rhys
- :Maredudd ap Tewdws
- :Marford Quarry
- :Margam Halt railway station
- :Margam Moors
- :Margam TMD
- :Margaret Delacourt-Smith, Baroness Delacourt-Smith of Alteryn
- :Margaret Pomeroy
- :Margaret Thomas (hymnwriter)
- :Margo Morgan
- :Mari Ellis Dunning
- :Marian-glas
- :Mariandyrys
- :Marina Towers Observatory
- :Marion Harrison
- :Marion Purcell
- :Mark Anstey
- :Mark Brown (rugby union)
- :Mark Davis (rugby union)
- :Mark Douglas (rugby union)
- :Mark Evans (comedian)
- :Mark Joseph (footballer)
- :Mark Rowley (rugby union)
- :Marloes Mere
- :Marquess of Anglesey's Column
- :Marros-Pendine Coast
- :Marros Group
- :Marteg Halt railway station
- :Martell Bridge Halt railway station
- :Martha'r Mynydd
- :Martin's Haven
- :Martin Williams (priest)
- :Martyn Lewis (badminton)
- :Martyn Morris
- :Marwysgafn
- :Mary Davies (poet)
- :Mary Elizabeth Davies
- :Mary Owen (hymnwriter)
- :Mary Pendrill Llewelyn
- :Mary Stallard
- :Mary Vaughan Jones Award
- :Maryland, Monmouthshire
- :Mason Grady
- :Matt Back
- :Matt Johnson (TV presenter)
- :Matthew Dent (designer)
- :Matthew Dwyer (rugby union)
- :Matthew Hughes (badminton)
- :Matthew Jones (priest)
- :Matthew Nuthall
- :Matthew Taylor (cricketer, born 1999)
- :Matthew Vaughan-Davies, 1st Baron Ystwyth
- :Matthew Wintle
- :Matthewstown Halt railway station
- :Maurice Blayne
- :Maurice Davies (MP)
- :Maurice Evans (footballer, born 1859)
- :Maurice Glynne
- :Maurice Meyricke
- :Mawddach Trail
- :Max Cleworth
- :Max Edwards-Stryjewski
- :Max Llewellyn
- :Max Nagy
- :May Hill Sandstone
- :Mayor of Carmarthen
- :Mayors in Wales
- :Maël (saint)
- :Mechain
- :Mechell
- :Medwyn Evans
- :Megan Barker
- :Meidrim
- :Meidrim Road Section
- :Meillionen railway station
- :Meilyr Brydydd
- :Meinir, Anglesey
- :Meinir Gwilym
- :Meirion Pennar
- :Meirion Roberts
- :Meirion Williams
- :Meirionnydd Nant Conwy (Assembly constituency)
- :Mel James
- :Mel Meek
- :Melanie Thomas (bowls)
- :Meliden
- :Meliden F.C.
- :Meliden railway station
- :Melin-y-Coed
- :Melin-y-Wig
- :Melindwr
- :Melyncourt Halt railway station
- :Menai Bach, Rhydwyn
- :Menai Bridge Urban District
- :Menna Richards
- :Mental Health (Wales) Measure 2010
- :Menw
- :Meredith Edwards (actor)
- :Meredith Morgan
- :Meredydd Barker
- :Merfyn ap Rhodri
- :Meri Huws
- :Merlin's Oak
- :Merlin James
- :Mermaid Quay
- :Merthyr (Plymouth Street) railway station
- :Merthyr Cynog
- :Merthyr Road railway station
- :Merthyr Tydfil (Cilsanws) Golf Club
- :Merthyr Tydfil College
- :Merthyr Tydfil Electric Tramways
- :Merthyr Tydfil and Aberdare (UK Parliament constituency)
- :Merthyr Tydfil and Rhymney (UK Parliament constituency)
- :Merthyr Tydfil bus station
- :Meurig (bishop)
- :Meurig Williams
- :Meurig ab Ithel
- :Meurig ap Hywel
- :Meurig ap Idnerth
- :Meyrick baronets
- :Michael Collins (rugby union, born 1986)
- :Michael Condon
- :Michael Deacon (bishop)
- :Michael Komor
- :Michael Newbold
- :Michael Price (footballer, born 1982)
- :Michael Roberts (college principal)
- :Michael Scott (academic)
- :Michael Williams (MP)
- :Michael Wixey
- :Michaela Breeze
- :Michaelston-super-Ely
- :Michton
- :Mid-Wales Constabulary
- :Mid Glamorganshire (UK Parliament constituency)
- :Mid Wales South League
- :Mid and South Pembrokeshire (UK Parliament constituency)
- :Middletown, Powys
- :Migneint
- :Mike Doyle (comedian)
- :Mike Gwilym
- :Mike Harris (rower)
- :Mike Knill
- :Mike Poole
- :Mike Preston (curler)
- :Mike Rayer
- :Mike Thomas (author)
- :Mike Walker (tennis)
- :Mike Williams (footballer, born 1956)
- :Milebrook
- :Milford Haven Formation
- :Millennium Coastal Path
- :Milltir Cerrig
- :Milo, Carmarthenshire
- :Minffordd
- :Mirage (metal band)
- :Miskin, Mountain Ash
- :Mochdre, Powys
- :Mochdre Sports F.C.
- :Mochdre with Penstrowed
- :Mochras
- :Moel-y-don
- :Moel-yr-hydd
- :Moel Cynghorion
- :Moel Druman
- :Moel Eilio (Carneddau)
- :Moel Emoel
- :Moel Fferna
- :Moel Gyw
- :Moel Hebog shield
- :Moel Hiraddug
- :Moel Hiraddug Limestone
- :Moel Hiraddug Quarries
- :Moel Lefn
- :Moel Llyfnant
- :Moel Penamnen
- :Moel Tryfan
- :Moel Tŷ Uchaf
- :Moel y Cerrig Duon
- :Moel y Ffridd
- :Moel y Gamelin
- :Moel yr Ogof
- :Moelfre, Conwy
- :Moelfre (hill)
- :Moelfre Isaf
- :Moelfre Lifeboat Station
- :Moelfre Uchaf
- :Moelfryn
- :Moelwyn Bach
- :Moelwyn Mawr
- :Moelwyn Mawr North Ridge Top
- :Moelyci Environmental Centre
- :Mold F.C.
- :Mold Golf Club
- :Mold Railway
- :Mold railway station
- :Mona, Anglesey
- :Monachty
- :Monkswood, Monmouthshire
- :Monkton Old Hall
- :Monmouth Mayhill railway station
- :Monmouth School for Girls Rowing Club
- :Monmouth Troy Goods Yard
- :Monmouthshire Building Society
- :Monmouthshire Way
- :Monnow Valley Studio
- :Monnow Valley Walk
- :Montgomery Town F.C.
- :Montgomeryshire Collections
- :Montgomeryshire County War Memorial
- :Montgomeryshire Football League
- :Montgomeryshire and Glyndŵr (UK Parliament constituency)
- :Moore Gwillim
- :Morawelon
- :Morben
- :Mordaf
- :Moreith ap Aidan
- :Morfa Borth
- :Morfa Harlech National Nature Reserve
- :Morfa Mawddach railway station
- :Morfa Stadium
- :Morfyw
- :Morgan-Botti lecture
- :Morgan Allen
- :Morgan Evans (rugby league)
- :Morgan Hen ab Owain
- :Morgan Jones (broadcaster)
- :Morgan Jones (cricketer)
- :Morgan Jones (railroad builder)
- :Morgan Jones (rugby union)
- :Morgan Knowles
- :Morgan Llwyd
- :Morgan MacRae
- :Morgan Morgan-Owen
- :Morgan Morris
- :Morgan Powell
- :Morgan Rhys
- :Morgan Williams (rugby union, born 1995)
- :Morgan ap Pasgen
- :Morgannwg (journal)
- :Moriah, Ceredigion
- :Mornington Meadows
- :Morriston East railway station
- :Morriston Town A.F.C.
- :Morriston West railway station
- :Morus Dwyfech
- :Moses Davies
- :Moss Halt railway station
- :Moss and Pentre railway station
- :Mostyn railway station
- :Moulton, Vale of Glamorgan
- :Mount Pleasant, Merthyr Tydfil
- :Mountain Ash Cardiff Road railway station
- :Mountain Ash Comprehensive School
- :Mountain Ash Urban District
- :Mounton
- :Mudiad Adfer
- :Mumbles (community)
- :Mumbles Beach
- :Mumbles Hill
- :Mumbles Pier railway station
- :Mumbles Rangers F.C.
- :Mumbles lifeboat disaster
- :Murco Petroleum
- :Mwdwl-eithin
- :Mwnt
- :Mwyngloddfa Castell
- :Mwyngloddfa Cwmystwyth
- :Mwyngloddfa Nantiago
- :My Salah Mat
- :Myarth
- :Myddelton College
- :Myddelton baronets
- :Myddfai Steep Belt
- :Mydroilyn
- :Myfanwy Fychan
- :Myfanwy Talog
- :Mylett Road Section
- :Mynach Falls
- :Mynachdy
- :Mynydd-Bach
- :Mynydd Bach, Ceredigion
- :Mynydd Cambergi
- :Mynydd Ceiswyn
- :Mynydd Drumau
- :Mynydd Drws-y-Coed
- :Mynydd Esgairweddan
- :Mynydd Gartheiniog
- :Mynydd Isa
- :Mynydd Isa F.C.
- :Mynydd Isa Spartans F.C.
- :Mynydd Llandygai
- :Mynydd Llwydiarth
- :Mynydd Maendy
- :Mynydd Marian
- :Mynydd Mawr
- :Mynydd Mechell
- :Mynydd Moel
- :Mynydd Perfedd
- :Mynydd Tal-y-Mignedd
- :Mynydd Ty-Isaf, Rhondda
- :Mynydd Ystyfflau-Carn
- :Mynydd y Cwm
- :Mynydd y Gelli
- :Mynydd y Glyn
- :Mynyddcerrig
- :Mynyddog Mwynfawr
- :Myrddin ap Dafydd
- :Myxococcus llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogochensis
- :NIACE
- :NPTC Group
- :NWCFA Intermediate Cup
- :NWCFA Junior Cup
- :Nadia Lawrence
- :Nancy Evans (table tennis)
- :Nanheudwy
- :Nannerch railway station
- :Nant-y-Belan and Prynela Woods
- :Nant-y-Ffrith
- :Nant-y-derry
- :Nant-y-moch Reservoir
- :Nant-y-moel
- :Nant Brân
- :Nant Ceiswyn
- :Nant Conwy RFC
- :Nant Conwy Rural District
- :Nant Cynnyd
- :Nant Ffrancon Formation
- :Nant Gelliwion Woodland
- :Nant Glas
- :Nant Gwernol railway station
- :Nant Hir Formation
- :Nant Hir Group
- :Nant Irfon National Nature Reserve
- :Nant Llwydiarth
- :Nant Mill
- :Nant Whitton Woodlands
- :Nant y Perfedd
- :Nantclwyd railway station
- :Nantcwnlle
- :Nantewlaeth Colliery Halt railway station
- :Nantgaredig
- :Nantgaredig railway station
- :Nantlle
- :Nantlle Vale F.C.
- :Nantmel
- :Nantyderry railway station
- :Nantyglo and Blaina
- :Nantymoel railway station
- :Nantyronen railway station
- :Narberth Road and Maenclochog Railway
- :Narberth railway station (Wales)
- :Narrative verdict
- :Nasareth
- :Nash-Williams
- :Nash Lighthouse Meadow
- :Nathan Buck (rugby union)
- :Nathan Evans (rugby union)
- :Nathan Shepperd
- :Nathan Williams (rugby union, born 1983)
- :Nathaniel Thomas (writer)
- :Nathaniel Williams
- :National Address Gazetteer
- :National Amalgamated Labourers' Union
- :National Assembly for Wales (Representation of the People) Order 2007
- :National Cycle Route 88
- :National Library of Wales Journal
- :National Screen and Sound Archive of Wales
- :Nature in Wales
- :Nature of Wales
- :Naunton Wayne
- :Naz Ball
- :Neath & District League
- :Neath Abbey railway station
- :Neath Canal Side railway station
- :Neath Disturbance
- :Neath Indoor Market
- :Neath Port Talbot Hospital
- :Neath Port Talbot Steelers
- :Neath Rural District
- :Neath and District Tramways Company
- :Neath and Swansea East (UK Parliament constituency)
- :Nebo, Anglesey
- :Nebo, Gwynedd
- :Nebo Chapel, Ystrad Rhondda
- :Nefyn and District Golf Club
- :Neil Swain
- :Nelson Glam railway station
- :Nelson and Llancaiach railway station
- :Nercwys
- :Nerys Jefford
- :Netball Superleague
- :Neuadd Idris
- :Neuadd Trefawr
- :Neuadd Wilym
- :Neuaddyrynys
- :Neudd-fawr
- :Nevern Bridge
- :Nevill Hall Hospital
- :New Bridge, Newbridge-on-Usk
- :New Brighton, Flintshire
- :New Brighton Villa F.C.
- :New Broughton, Wrexham
- :New Broughton Road Halt railway station
- :New Inn Bridge Halt railway station
- :New Panteg RFC
- :New Radnor Rural District
- :New Radnor railway station
- :New Row
- :Newborough Forest
- :Newbridge, Ceredigion
- :Newbridge-on-Usk
- :Newcastle, Monmouthshire
- :Newchurch, Powys
- :Newchurch and Merthyr
- :Newport (Ymerodraeth State of Mind)
- :Newport Bus
- :Newport Cliffs
- :Newport Corinthians F.C.
- :Newport Corporation Tramways
- :Newport Dock Street railway station
- :Newport Ebbw Junction TMD
- :Newport HSOB RFC
- :Newport Market
- :Newport Networks
- :Newport Poor Law Union
- :Newport Retail Park
- :Newport Saracens RFC
- :Newport Technical Institute
- :Newport Unlimited
- :Newport West Central railway station
- :Newport West and Islwyn (UK Parliament constituency)
- :Newport West railway station
- :Newport bus station
- :Newton, Brecknockshire
- :Newton, Porthcawl
- :Newtown, Rhondda Cynon Taf
- :Newtown High School, Powys
- :Newtown Wanderers F.C.
- :Nia Caron
- :Nia Roberts (actress)
- :Nic Reynolds
- :Nicholas Griffith
- :Nicholas Hawkins (MP)
- :Nick Swetman
- :Nicola Cousins
- :Nicola Crawford
- :Nicola Davies (judge)
- :Nicola Lewis
- :Nidum
- :Nigel Edwards (golfer)
- :Nigel Rees (footballer)
- :Nigel Whitehouse
- :Nigel Williams (priest)
- :Nigel Yates
- :Nightingale Court
- :Nikara Jenkins
- :Nine Mile Point Colliery
- :Nine Mile Point railway station
- :Nisien
- :Noel L. Owen
- :Norma Curtis
- :Norman Lloyd-Edwards
- :Norman Matthews
- :Norman Morgan
- :Norman Pugh
- :Norman Toutcher
- :North Cornelly
- :North Dock, Llanelli
- :North East Wales Football League
- :North Llanrwst railway station
- :North Stack
- :North Wales Chronicle
- :North Wales Coast East Football League
- :North Wales Coast West Football League
- :North Wales Gazette
- :North Wales Hospital
- :North Wales International Music Festival
- :North Wales Miners' Association
- :North Wales Police and Crime Commissioner
- :North Wales Weekly News
- :North Wales and Liverpool Railway
- :North Wales rugby
- :Northop Hall
- :Northop Hall Country House Hotel
- :Norton, Powys
- :Noson Lawen (TV series)
- :Nuts and Bolts (TV series)
- :O Oes Gwrtheyrn Gwrtheneu
- :Oakdale Colliery
- :Oakdale Hospital
- :Oakenholt
- :Oakford, Ceredigion
- :October 1888 Merthyr Tydfil by-election
- :Off to Philadelphia in the Morning (TV series)
- :Offa's Country
- :Ogilvie Village Halt railway station
- :Ogmore, Vale of Glamorgan
- :Ogmore Vale railway station
- :Ogmore Valley
- :Ogof Draenen
- :Ogof Dydd Byraf
- :Ogof Nadolig
- :Ogwen (electoral ward)
- :Ogwen Group
- :Old Brewery Quarter
- :Old Castle Down
- :Old Church Stoke
- :Old Mortuary Chapel, Carew
- :Old Padeswood Golf Club
- :Old Pulford Brook Meadows
- :Old Radnor
- :Old St. Peter's Church, Llanbedr Dyffryn Clwyd
- :Old Welsh Grey Sheepdog
- :Oldcastle, Monmouthshire
- :Oliver Davies (harpist)
- :Oliver Gwilt
- :Oliver Lloyd
- :Oliver Morris
- :Oliver Pike (cricketer)
- :Oliver Taylor (footballer, born 1869)
- :Olivia Clark
- :Olmarch
- :Olmarch Halt railway station
- :Olway Brook
- :Omar Taylor-Clarke
- :Onllwyn
- :Onny Shale
- :Operation Tân
- :Oriel Ynys Môn
- :Ossie Evans
- :Oswald Davies
- :Overton-on-Dee railway station
- :Overton Rural District
- :Owain Harris-Allan
- :Owain Jones (priest)
- :Owain Owain
- :Owain Taylor
- :Owain Williams (rugby union)
- :Owain ap Caradog
- :Owain ap Dafydd
- :Owain ap Llywelyn ab y Moel
- :Owain ap Maredudd (Dyfed)
- :Owen Caech Ó Dubhda
- :Owen Davies (Baptist minister)
- :Owen Evans (civil servant)
- :Owen Evans (priest)
- :Owen Gwyn
- :Owen Jenkins (priest)
- :Owen Jenkins (rugby union)
- :Owen Lane
- :Owen Morgan (cricketer)
- :Owen Owen (priest)
- :Owen Phillips (priest)
- :Owen Picton Davies (journalist)
- :Owen Powell
- :Owen Roberts (educator)
- :Owen Wood
- :Oystermouth railway station
- :Padeswood and Buckley railway station
- :Painscastle
- :Painscastle Rural District
- :Palmerstown, Vale of Glamorgan
- :Pam John
- :Pamela Hopkins
- :Pandy, Gwersyllt
- :Pandy, Powys
- :Pandy Quarries
- :Pandy Tudur
- :Pandy railway station
- :Panic Shack
- :Pant, Merthyr Tydfil
- :Pant-gwyn, Ceredigion
- :Pant-y-crug
- :Pant Glas
- :Pant Glas railway station
- :Pant Halt railway station
- :Pantasaph
- :Panteg
- :Pantinker
- :Panton Arms Hotel, Pentraeth
- :Pantydwr railway station
- :Pantyffordd Halt railway station
- :Pantyffynnon
- :Pantymwyn
- :Pantysgallog (High Level) Halt railway station
- :Pantysgallog (Low Level) Halt railway station
- :Pantywaun Halt railway station
- :Papur Bro
- :Paradwys
- :Parc, Penrhyndeudraeth
- :Parc-Seymour
- :Parc-llyn
- :Parc-y-Dwrlyn Ground
- :Parc Cynog
- :Parc Linden, Lixwm
- :Parc Slip Colliery
- :Parc Trostre
- :Parc a'r Mynydd
- :Parc y Rhos
- :Parciau
- :Parcyrhun Halt railway station
- :Park, Merthyr Tydfil
- :Park Avenue, Aberystwyth
- :Park House Outbuildings
- :Partrishow
- :Pasgen ap Cyngen
- :Pat Daniels (rugby union)
- :Pat Evans (gymnast)
- :Pat Murphy (Welsh footballer)
- :Pat Perks
- :Patrick Hannan (presenter)
- :Patrick Leary
- :Patrick Palmer (rugby union)
- :Paul Affleck
- :Paul Child (singer)
- :Paul Davies (Conservative politician)
- :Paul Knight
- :Paul Mackness
- :Paul Morgan (rugby)
- :Paul Roberts (footballer, born 1977)
- :Paul Taylor (bowls)
- :Pedairffordd Halt railway station
- :Peggy Jackson
- :Pegwn Mawr
- :Pelenna
- :Pelenna (electoral ward)
- :Pemberton, Carmarthenshire
- :Pembrey Airport
- :Pembrey Burrows
- :Pembrey Coast
- :Pembrey Country Park
- :Pembrey and Burry Port Town
- :Pembrey and Burry Port railway station
- :Pembrey railway station
- :Pembroke Limestone Group
- :Pembroke cattle
- :Pembroke railway station
- :Pembrokeshire College
- :Pembrokeshire Historian
- :Pembrokeshire Motor Museum
- :Pen-Llyn
- :Pen-Lôn
- :Pen-Rhiw-Newydd
- :Pen-Ty Pastures & Wood
- :Pen-bont-rhyd-y-beddau
- :Pen-cae
- :Pen-dre
- :Pen-llwyn
- :Pen-rhiw
- :Pen-y-Bont-Fawr
- :Pen-y-Bont railway station
- :Pen-y-Cefn Pasture
- :Pen-y-cae, Powys
- :Pen-y-cae-mawr
- :Pen-y-coedcae
- :Pen-y-fai, Bridgend
- :Pen-y-fan Pond
- :Pen-y-ffordd
- :Pen-y-garnedd
- :Pen-y-graig-goch
- :Pen-y-groes, Carmarthenshire
- :Pen-y-lan, Ceredigion
- :Pen-y-wenallt
- :Pen Bwlch Llandrillo
- :Pen Dal-aderyn
- :Pen Llithrig y Wrach
- :Pen Pumlumon Arwystli
- :Pen Pumlumon Llygad-bychan
- :Pen Rhionydd
- :Pen Talar
- :Pen Tranch
- :Pen y Boncyn Trefeilw
- :Pen y Brynfforchog
- :Pen y Castell
- :Pen y Dre High School
- :Pen yr Allt Uchaf
- :Pen yr Helgi Du
- :Penallt Halt railway station
- :Penallt Viaduct
- :Penally railway station
- :Penarddun
- :Penarth Coast
- :Penarth Head
- :Penarth Quarry
- :Penarth Times
- :Penbedw
- :Penbol
- :Penbontrhydyfoethau
- :Pencader, Carmarthenshire
- :Pencader Junction railway station
- :Pencader railway station
- :Pencarnisiog
- :Pencarreg
- :Penceilogi
- :Pencelli
- :Penclawdd railway station
- :Pencoed Athletic BGC
- :Pencoed College
- :Pencoed railway station
- :Pencraig, Anglesey
- :Pencreigiau'r Llan
- :Penderyn, Rhondda Cynon Taf
- :Pendine Museum of Speed
- :Penegoes
- :Pengam (Mon) railway station
- :Pengam railway station
- :Pengelli National Nature Reserve
- :Pengenffordd
- :Pengorffwysfa
- :Penhelig railway station
- :Peniarth
- :Peniarth 164
- :Peniarth 259B
- :Peniarth 28
- :Peniarth 32
- :Peniarth 481
- :Peniarth 6
- :Peniel, Carmarthenshire
- :Penisa'r Waun
- :Penlan
- :Penlan Club A.F.C.
- :Penllech
- :Penllyn, Gwynedd
- :Penllyn, Vale of Glamorgan
- :Penmachno Document
- :Penmaen Halt railway station
- :Penmaenmawr Urban District
- :Penmaenpool railway station
- :Penmark
- :Penmorfa
- :Penmorwdd
- :Pennal
- :Pennant, Ceredigion
- :Pennant, Powys
- :Pennant Measures
- :Penparc
- :Penparc, Pembrokeshire
- :Penpedairheol, Caerphilly
- :Penpergwm
- :Penpont Manor House
- :Penprysg
- :Penrhiw Priory
- :Penrhiwceiber railway station
- :Penrhiwfer
- :Penrhiwpal
- :Penrhos, Anglesey
- :Penrhos, Gwynedd
- :Penrhos, Monmouthshire
- :Penrhos Cottage
- :Penrhos Country Park
- :Penrhosfeilw
- :Penrhyd Lastra
- :Penrhyn (electoral ward)
- :Penrhyn railway station
- :Penrhyndeudraeth railway station
- :Penrice (community)
- :Pensarn
- :Pensarn, Gwynedd
- :Pensarn railway station
- :Penscynor Halt railway station
- :Pentir
- :Pentir Rhiw railway station
- :Pentraeth railway station
- :Pentre, Ceredigion
- :Pentre-bach, Ceredigion
- :Pentre-bach, Powys
- :Pentre-bach railway station
- :Pentre-gat
- :Pentre-rhew
- :Pentre Bach
- :Pentre Bont
- :Pentre Broughton Halt railway station
- :Pentre Dwr
- :Pentre Gwynfryn
- :Pentre Platform railway station
- :Pentrebach, Swansea
- :Pentrebane
- :Pentrecelyn
- :Pentrechwyth
- :Pentrefelin, Ceredigion
- :Pentrefelin Halt railway station
- :Pentrefelin railway station
- :Pentrellwyn
- :Pentrepiod Halt railway station (Gwynedd)
- :Pentresaeson Halt railway station
- :Pentwyn Deintyr
- :Pentwyn Halt railway station
- :Pentwynmawr Platform railway station
- :Pentyrch railway station
- :Penuwch
- :Penweddig
- :Penybont
- :Penybont, Ceredigion
- :Penybontfawr railway station
- :Penybryn
- :Penychen
- :Penydarren B.G.C.
- :Penydarren Park
- :Penygarn, Torfaen
- :Penygraig railway station
- :Penygraigwen
- :Penygroes railway station
- :Penylan Quarry
- :Penymynydd
- :Penyrheol, Caerphilly
- :Penyrheol, Swansea
- :Penyrheol, Trecenydd and Energlyn
- :Penyrheol Comprehensive School
- :Penyrheol Halt railway station
- :Penystrywad
- :Percy James
- :Percy May (gymnast)
- :Percy Watkins
- :Peredur Owen Griffiths
- :Perfedd Hundred
- :Personation of a juror
- :Perthcelyn
- :Peryf ap Cedifor
- :Peter Arthur
- :Peter Brooks (priest)
- :Peter Clarke (social worker)
- :Peter Creed
- :Peter Davies (footballer, born 1936)
- :Peter Diversi
- :Peter Francis (rugby union)
- :Peter Griffiths (footballer, born 1862)
- :Peter Maurice (Dean of Bangor)
- :Peter Maurice (priest)
- :Peter Noyes
- :Peter Penry-Jones
- :Peter Pike (priest)
- :Peter Rees (rugby union, born 1925)
- :Peter Rees (rugby union, born 1937)
- :Peter Stead (writer)
- :Peter Williams (Welsh Methodist)
- :Peter Williams (footballer, born 1960)
- :Peter Woodman (priest)
- :Peterstone
- :Peterstone Gout
- :Phil Clark (director)
- :Phil John (rugby union, born 1962)
- :Phil Lewis (rugby union)
- :Phil Llewellyn
- :Phil May (rugby union)
- :Phil Morgan (rugby union)
- :Phil Price (rugby union)
- :Phil Pugh
- :Philanthropic Order of True Ivorites
- :Philip David
- :Philip Pedlar
- :Philip Powell (martyr)
- :Philip Weekes
- :Phyllis Linton
- :Pickhill Halt railway station
- :Picture Frame Seduction
- :Pierce Lewis
- :Pigeon's Ford
- :Pill A.F.C.
- :Pine Lodge Meadow
- :Pinged railway station
- :Pisgah, Ceredigion
- :Pistyll
- :Pistyll y Llyn
- :Pitt's Head railway station
- :Placid Casual
- :Plaid Glyndŵr
- :Plas Cwmcynfelin
- :Plas Gwyn
- :Plas Gwynant
- :Plas Halt railway station
- :Plas Llanfair
- :Plas Llanstephan
- :Plas Power railway station (Wrexham, Mold and Connah's Quay Railway)
- :Plas Power railway station (Wrexham and Minera Railway)
- :Plas Tan y Bwlch
- :Plas Uchaf Formation
- :Plaskynaston Lane
- :Plasmarl railway station
- :Plastic Raygun
- :Plethyn
- :Plough Lane Chapel, Brecon
- :Pluck Lake
- :Pochin Pits Colliery Platform railway station
- :Poetry Wales
- :Point of Ayr Colliery Company
- :Ponkey Crossing Halt railway station
- :Pont-Hwfa
- :Pont-rhyd-y-groes
- :Pont-y-Pant railway station
- :Pont-y-gwaith
- :Pont Aberarth
- :Pont Bodefail
- :Pont Bodfel
- :Pont Books
- :Pont Ceri
- :Pont Henri
- :Pont Lliw railway station
- :Pont Paith
- :Pont Rug (Halt) railway station
- :Pont Treseli
- :Pont y Ddraig
- :Pont y Fenni Quarry and Road Cutting
- :Pont y Gilfach
- :Pontardawe Festival
- :Pontardawe Tinplate Works
- :Pontardawe railway station
- :Pontarddulais Comprehensive School
- :Pontarddulais Park
- :Pontarddulais Town A.F.C.
- :Pontarsais
- :Pontblyddyn
- :Pontcynon
- :Pontdolgoch
- :Pontdolgoch railway station
- :Ponterwyd
- :Pontfadog
- :Ponthenry railway station
- :Ponthir
- :Ponthirwaun
- :Pontllanfraith A.F.C.
- :Pontllanfraith Low Level railway station
- :Pontlliw
- :Pontlliw and Tircoed
- :Pontlottyn
- :Pontlottyn Blast Furnace F.C.
- :Pontlottyn railway station
- :Pontrhyd-Saeson
- :Pontrhydfendigaid
- :Pontrhydyfen railway station
- :Pontrhythallt railway station
- :Pontrobert
- :Pontsarn Halt railway station
- :Pontsiân
- :Pontsticill
- :Pontwalby Halt railway station
- :Pontyates railway station
- :Pontyberem
- :Pontyberem railway station
- :Pontycymer
- :Pontycymmer railway station
- :Pontygwaith
- :Pontygwaith Halt railway station
- :Pontymoile
- :Pontypool Clarence Street railway station
- :Pontypool Crane Street railway station
- :Pontypridd Chronicle
- :Pontypridd High School
- :Pontyrhyl railway station
- :Pool Quay railway station
- :Popton Fort
- :Port Penrhyn
- :Port Talbot Lifeboat Station
- :Port Tennant
- :Portbury Shipyard railway station
- :Porth-y-Felin
- :Porth Ceiriad
- :Porth Neigwl
- :Porth railway station
- :Porthcawl Comprehensive School
- :Porthcawl Lifeboat Station
- :Portheiddy Moor
- :Porthkerry Viaduct
- :Porthmadog Urban District
- :Porthmadog railway station
- :Portmead
- :Potter's Electric News
- :Powys (surname)
- :Powys Digital History Project
- :Powys Teaching Health Board
- :Powysland Club
- :Prano Bailey-Bond
- :Prejudicial interest
- :Pren-gwyn
- :Prenteg
- :Presbyterian Chapel, Rossett
- :Prestatyn Chapel Street railway station
- :Prestatyn Coal Company
- :Prestatyn Community Hospital
- :Prestatyn High School
- :Prestatyn Sports F.C.
- :Prestatyn and Rhyl Panthers
- :Presteign railway station
- :Price Town
- :Price White
- :Prifardd
- :Prince Charles Hospital
- :Princess of Wales Hospital
- :Principal council
- :Prisoners' Education Trust
- :Probyn-Jones baronets
- :Proceedings of the South Wales Institute of Engineers
- :Pryce baronets
- :Prydain
- :Prys-Iorwerth
- :Pryse's Cambrian Book Register
- :Pumlumon Cwmbiga
- :Pumlumon Fach
- :Puncheston railway station
- :Pwll
- :Pwll-y-Pant railway station
- :Pwll Dwfn
- :Pwll Fanog wreck
- :Pwll Lagoon
- :Pwlldu Bay
- :Pwllfanogl
- :Pwllgloyw
- :Pwllmeyric
- :Pwllywrach
- :Quadrant Shopping Centre
- :Quakers Yard and Merthyr Railway
- :Qualifications, Curriculum and Assessment Authority for Wales
- :Quarter Bach
- :Queensferry railway station
- :Quentin Berriman
- :R. Geraint Gruffydd
- :RAF Prestatyn
- :Rachub
- :Radnor Valley F.C.
- :Radyr Motive Power Depot
- :Rae Howells
- :Rae Jenkins
- :Raer Theaker
- :Raglan Footpath railway station
- :Raj Popat
- :Ralph Bigland (born 1757)
- :Ralph Jones (footballer)
- :Randolph Thomas
- :Rassau
- :Ray Booth
- :Ray Pulis
- :Ray Williams (bowls)
- :Ray Williams (rugby union, born 1927)
- :Raymond Garlick
- :Raymond Glendenning
- :Raymond Renowden
- :Rebecca Television
- :Red Bull Unleashed
- :Red Lion Hill
- :Red Marl Group
- :Red Wharf Bay
- :Redhill Mudstone
- :Rees David
- :Reginald Brian
- :Reginald Clarry
- :Reginald Hathway
- :Registered Teacher Programme
- :RenewableUK Cymru
- :Reports and Transactions, Cardiff Naturalists' Society
- :Residuary Body for Wales
- :Resolven
- :Resolven (electoral ward)
- :Resolven railway station
- :Rest Bay
- :Restaurant James Sommerin
- :Reuben Davies
- :Reuben Humphreys
- :Reuben Morgan-Williams
- :Reynoldston
- :Rhain ap Cadwgan
- :Rhain ap Maredudd
- :Rhain the Irishman
- :Rhandirmwyn
- :Rhayader Castle
- :Rhayader Rural District
- :Rhedyw
- :Rheidol Falls railway station
- :Rheidol Power Station
- :Rheola, Wales
- :Rheon James
- :Rhes-y-cae
- :Rhewl (Llanynys, Denbighshire)
- :Rhewl railway station
- :Rhiangoll
- :Rhiannon Henry
- :Rhidian
- :Rhidian Brook
- :Rhigos Halt railway station
- :Rhipinllwyd
- :Rhirid Flaidd
- :Rhiryd ap Bleddyn
- :Rhiw Goch
- :Rhiw Valley Light Railway
- :Rhiwaedog
- :Rhiwallon ap Cynfyn
- :Rhiwargor
- :Rhiwbina railway station
- :Rhiwderin
- :Rhiwderin Congregational Chapel
- :Rhiwfawr
- :Rhiwfron railway station
- :Rhiwlas Formation
- :Rhiwsaeson
- :Rhoda Willis
- :Rhodri Davies (rugby union)
- :Rhodri Evans
- :Rhodri Lewis
- :Rhodri Thomas
- :Rhodri ab Idwal Foel
- :Rhodri ap Gruffudd
- :Rhodri ap Hyfaidd
- :Rhodri ap Hywel
- :Rhondda Labour and Liberal Association
- :Rhondda Rebels
- :Rhondda and Ogmore (UK Parliament constituency)
- :Rhondda by-pass
- :Rhoose Point
- :Rhos-on-Sea Golf Club
- :Rhos-y-garth
- :Rhos-y-gwaliau
- :Rhos (GWR) railway station
- :Rhos Blaen Carrog
- :Rhos Bwlch-y-rhandir
- :Rhos Cefn Hir
- :Rhos Cruglas
- :Rhos Dolau-Bran
- :Rhos Fawr
- :Rhos Fullbrook
- :Rhos Gellie
- :Rhos Goch National Nature Reserve
- :Rhos Llawr Cwrt National Nature Reserve
- :Rhos Pwllygawnen
- :Rhos railway station
- :Rhoscolyn
- :Rhosddu Halt railway station
- :Rhosgadfan
- :Rhosgoch
- :Rhosgoch railway station
- :Rhosmeirch
- :Rhosneigr
- :Rhosrobin Halt railway station
- :Rhostryfan
- :Rhostryfan railway station
- :Rhostyllen railway station
- :Rhosydd
- :Rhosydd Castell-du & Plas-y-bettws
- :Rhosygadair Newydd
- :Rhosymedre
- :Rhosymedre Halt railway station
- :Rhosyr
- :Rhosyr (cantref)
- :Rhuallt
- :Rhuawn Bebyr
- :Rhuddlan, Ceredigion
- :Rhun ab Owain Gwynedd
- :Rhwydrys
- :Rhychwyn
- :Rhyd, Ceredigion
- :Rhyd, Gwynedd
- :Rhyd-Meirionnydd
- :Rhyd-Rosser
- :Rhyd-ddu
- :Rhyd-lwyd
- :Rhyd-uchaf
- :Rhyd-y-Beillen
- :Rhyd-y-Marchogion
- :Rhyd-y-Saint railway station
- :Rhyd y Foel
- :Rhydargaeau
- :Rhydcymerau
- :Rhydderch (bishop)
- :Rhyddfedd Frych
- :Rhydowen
- :Rhydowen Halt railway station
- :Rhydwyn
- :Rhydyclafdy
- :Rhydyfelin (High Level) Halt railway station
- :Rhydymwyn railway station
- :Rhydyn Hall
- :Rhygyfarch
- :Rhyl/Prestatyn Built-up area
- :Rhyl Coasters
- :Rhyl Dragons F.C.
- :Rhyl Flats
- :Rhyl High School
- :Rhys Anstey
- :Rhys Britton
- :Rhys Bwtting
- :Rhys Cadwaladr
- :Rhys Davies (rugby union, born February 1998)
- :Rhys Davies (rugby union, born November 1998)
- :Rhys Enoch
- :Rhys Fawr ap Maredudd
- :Rhys Gethin
- :Rhys Goch Eryri
- :Rhys Henry
- :Rhys Jenkins (rugby union)
- :Rhys Jenkins (runner)
- :Rhys Powell
- :Rhys Prichard
- :Rhys Vaughan
- :Rhys Williams (rugby union, born 1979)
- :Rhys ab Owen
- :Rhys ap Robert
- :Rice Rees
- :Richard Avent
- :Richard Barratt
- :Richard Barrett (composer)
- :Richard Bassett (priest)
- :Richard Benyon (gymnast)
- :Richard Brunstrom
- :Richard Bulkeley, 3rd Viscount Bulkeley
- :Richard Cole-Hamilton
- :Richard Cornwall (died 1569)
- :Richard Cyril Hughes
- :Richard Davies (archdeacon of Brecon)
- :Richard Delabere
- :Richard Diplock
- :Richard Donovan (rugby union)
- :Richard Fothergill (ironmaster)
- :Richard Gay (field hockey)
- :Richard Gough (Welsh footballer)
- :Richard Gwynn
- :Richard Harford
- :Richard Hersee
- :Richard Hughes (archdeacon of Bangor)
- :Richard Jarrett
- :Richard Jones (bishop)
- :Richard Jones (footballer, born 1875)
- :Richard Jones (footballer, born 1878)
- :Richard Jones (footballer, born 1879)
- :Richard Langford (priest)
- :Richard Lewis (bishop of Llandaff)
- :Richard Mackenzie Williams
- :Richard Mason (Welsh author)
- :Richard Meredyth Richards
- :Richard Nanney
- :Richard Newcombe (priest)
- :Richard Owen (priest)
- :Richard Owen Jones
- :Richard P. Howell
- :Richard Parry (bishop)
- :Richard Parry Williams
- :Richard Price (Radnor MP)
- :Richard Puskyn
- :Richard Rees (rugby union)
- :Richard Rice Thomas
- :Richard Richards (1787–1860)
- :Richard Roberts (priest)
- :Richard Vaughan (judge)
- :Richard Venables
- :Richard Ward (priest)
- :Richard William Dafydd
- :Richard William Davies
- :Richard Wintle
- :Richard Young (bishop of Rochester)
- :Richmond Park, Carmarthen
- :Rico Zulkarnain
- :Ridgeway, Newport
- :Rio Dyer
- :Riot City Ravens
- :Risca Community Comprehensive School
- :Risca and Pontymister railway station
- :Risen (2010 film)
- :River Adda (Wales)
- :River Aled
- :River Alun, Pembrokeshire
- :River Amman
- :River Arrow, Wales
- :River Arth
- :River Artro
- :River Banwy
- :River Brenig
- :River Cain
- :River Carno
- :River Cegidog
- :River Clydach, Monmouthshire
- :River Clydach (Neath)
- :River Clywedog, Denbighshire
- :River Cynon
- :River Cywyn
- :River Dulais
- :River Dulas
- :River Eitha
- :River Elwy
- :River Ffyddion
- :River Geirionydd
- :River Gele
- :River Giedd
- :River Gwendraeth
- :River Gwili
- :River Hawen
- :River Ithon
- :River Lliedi
- :River Llugwy
- :River Machno
- :River Rhaeadr
- :River Solva
- :River Tanat
- :River Terrig
- :River Trothy
- :River Vyrnwy
- :River Wheeler
- :River Wnion
- :Riverside, Newport
- :Roath railway station
- :Rob Appleyard
- :Rob Sherman (football manager)
- :Rob Sutherland
- :Robert Albert Jones
- :Robert Allen (Baptist minister)
- :Robert Anderson Evans
- :Robert Bird (Welsh politician)
- :Robert C. Hastie
- :Robert Edwards (pirate)
- :Robert Ellis (clergyman)
- :Robert Evans (Master of Magdalene)
- :Robert Gruffydd
- :Robert Jones (Labour politician)
- :Robert Jones (Welsh composer)
- :Robert McMillan (footballer)
- :Robert Minhinnick
- :Robert Morgan (rugby union)
- :Robert Morris (Welsh footballer)
- :Robert Myddelton Biddulph (1805–1872)
- :Robert Robotham (priest)
- :Robert Salesbury
- :Robert Watkin Wynne
- :Robert White (priest)
- :Robert Williams (archdeacon of Carmarthen)
- :Robert Williams (archdeacon of Gower)
- :Robert Williams (died 1763)
- :Robert Williams (pathologist)
- :Robert Williams (poet)
- :Robeston Wathen Quarries
- :Robin Davies
- :Robin Llywelyn
- :Robin Parfitt
- :Robin Williams (physicist)
- :Robson Blake
- :Robyn Léwis
- :Rock climbing in Wales
- :Rockspur Fords F.C.
- :Rocky Valley Halt railway station
- :Rod Williams (Welsh footballer)
- :Roderick Jones (baritone)
- :Roger Adams (printer)
- :Roger Bidgood
- :Roger Blake
- :Roger Blyth
- :Roger Cradock
- :Roger Evans (footballer)
- :Roger Green (rugby league)
- :Roger Hughes (priest)
- :Roger Jones (bowls)
- :Roger Michaelson
- :Roger Mostyn (footballer)
- :Roger Vaughan (of Clyro)
- :Roger Vaughan of Porthamal
- :Roger Yeoman
- :Rogerstone A.F.C.
- :Roland Mathias
- :Roland Thomas
- :Roley Williams
- :Roman Walker
- :Ron Evans (rugby union)
- :Ron Hugh
- :Ron Jones (businessman)
- :Ron Jones (rugby union)
- :Ron Wynn (footballer)
- :Ronald James Tree
- :Ronan Vibert
- :Ronnie Flanagan
- :Ronnie Morris (rugby union)
- :Ronnie Williams (footballer)
- :Rory O'Connor (rugby union, born 1932)
- :Rose Cottage, Ruthin
- :Rose Mary Crawshay
- :Rose Thomas (field hockey)
- :Rosebush railway station
- :Rossett Hall
- :Rossett railway station
- :Roundton Hill
- :Rovi (magician)
- :Rowland Ap Meredydd
- :Rowland Ellis (bishop)
- :Rowland Fothergill
- :Rowland Gwynne
- :Rowland Prichard
- :Rowland Williams (priest)
- :Rownd a Rownd
- :Roy Burnett
- :Roy Davies (bishop)
- :Roy Evans (table tennis)
- :Roy Saunders (author)
- :Royal Alexandra Hospital, Rhyl
- :Royal Institution of South Wales
- :Royal Oak Foundation
- :Royal Society of Architects in Wales
- :Ruabon/Llantysilio Mountains and Minera
- :Ruby Levick
- :Ruby Miller (cyclist)
- :Rudry
- :Rugby League Amateur Four Nations
- :Rumney Quarry
- :Ruqaya Izzidien
- :Ruth Hussey (doctor)
- :Ruth Jên
- :Ruth Martin-Jones
- :Ruthin Union Workhouse
- :Ruthin and Cerrig-y-Drudion Railway
- :Ruthin railway station
- :Ryan Elias
- :Ryan George
- :Ryan Hillier
- :Ryan Viggars
- :Ryan Watkins
- :Ryan Wilkins
- :Ryan Woodman
- :Ryan and Ronnie
- :S4C Authority
- :S4C Dau
- :SC2 (leisure complex)
- :SP Manweb
- :SS Mael and Sulien's Church, Corwen
- :Sadyrnfyw
- :Sailors' Chapel, Angle
- :Saint Bugi
- :Saint Dunod
- :Saint Edeyrn
- :Saint Egwad
- :Saint Eigrad
- :Saint Flewyn
- :Saint Gwenfyl
- :Saint Ilid
- :Saint Illtyd's Walk
- :Saint Ina
- :Saint Isan
- :Saint Issel
- :Saint Llamined
- :Saint Llechid
- :Saint Llibio
- :Saint Peirio
- :Saint Rhian
- :Saint Tecwyn
- :Saint Tegai
- :Saint Trillo
- :Saint Tudglyd
- :Saleem Kidwai (Muslim Council of Wales)
- :Salem, Ceredigion
- :Saltney Ferry railway station
- :Sam Costelow
- :Sam Davies (cricketer)
- :Sam Davies (footballer, born 1894)
- :Sam Fenwick
- :Sam Jones (Welsh footballer)
- :Sam Moore (rugby union)
- :Sam Rowlands
- :Sam Wainwright
- :Samantha Quayle
- :Sampson Lort
- :Samson Lee
- :Samuel Brookes
- :Samuel Davies (priest)
- :Samuel Jones (footballer, born 1866)
- :Samuel Jones (footballer, born 1870)
- :Samuel Kurtz
- :Samuel Richardson (High Sheriff)
- :Sanddef
- :Sandfields East
- :Sandy, Carmarthenshire
- :Sandy Griffiths
- :Sandycroft
- :Sandycroft railway station
- :Sarah Jones (field hockey)
- :Sarah Lianne Lewis
- :Sarah Loosemore
- :Sarah Thomas (badminton)
- :Sarah Wixey
- :Sardis Road
- :Sarn, Bridgend
- :Sarn Badrig
- :Sarn Gynfelyn
- :Sarn Meyllteyrn
- :Sarn railway station
- :Sarn y Bwch
- :Sarnau railway station
- :Saron, Carmarthenshire
- :Saunders Davies
- :Saundersfoot railway station
- :Saundersfoot to Telpyn Coast
- :Saxon Jenkins
- :Scafell Halt railway station
- :Schools Council
- :Scott Matthews (rugby union)
- :Scott Otten
- :Scott Phillips (cricketer)
- :Scott Williams (footballer)
- :Sealand, Flintshire
- :Sealand Rifle Range Halt railway station
- :Sean Griffiths
- :Secondary Schools Examinations Council
- :Sefnyn
- :Seisyll Bryffwrch
- :Selattyn
- :Selwyn Closs-Parry
- :Selwyn Griffith
- :Selyf ap Cynan
- :Senedd Standards of Conduct Committee
- :Senghenydd railway station
- :Senior Presiding Judge for England and Wales
- :Senni Beds
- :Sennybridge
- :Seren Cymru
- :Seren Gibson
- :Seren Gomer
- :Seren Stiwdios
- :Sesswick Halt railway station
- :Severn Bridge Railway
- :Sevira, daughter of Maximus
- :Sgorio
- :Sgorio Cymru
- :Shadrach Pryce
- :Shaftesbury, Newport
- :Sharon Morris
- :Shaun Chapple
- :Shelim Hussain
- :Shelter Cymru
- :Sherman Theatre
- :Shirley Griffiths (priest)
- :Sholeshook Limestone
- :Shotton Lagoons and Reedbeds
- :Shrapnel (Welsh punk band)
- :Sian Adey-Jones
- :Sian Eleri
- :Sian Harries
- :Sian Morris
- :Sian Phillips (musician)
- :Sibrydion
- :Sid Lawrence
- :Sikhism in Wales
- :Silian, Ceredigion
- :Simon Brooks
- :Simon Davies (Welsh TV presenter)
- :Simon Lloyd (archdeacon of Merioneth)
- :Simon Mathews
- :Simon Thelwall (MP died 1586)
- :Simon Thelwall (MP died 1663)
- :Simon Yorke (1903–1966)
- :Simwnt Fychan
- :Singleton Abbey
- :Sion Bebb
- :Sion Bennett
- :Sion Jones (rugby league)
- :Sion Morris
- :Siop Nain
- :Sir Charles Kemeys, 2nd Baronet
- :Sir Charles Kemeys, 3rd Baronet
- :Sir Charles Lloyd, 1st Baronet, of Milfield
- :Sir Charles Tynte, 5th Baronet
- :Sir David Llewellyn, 1st Baronet
- :Sir Edward Stradling, 5th Baronet
- :Sir John Philipps, 4th Baronet
- :Sir John Philipps, 6th Baronet
- :Sir John Stepney, 3rd Baronet
- :Sir John Stepney, 8th Baronet
- :Sir John Stradling, 1st Baronet
- :Sir Nicholas Williams, 1st Baronet
- :Sir Rhys Llewellyn, 2nd Baronet
- :Sir Richard Fowler, 2nd Baronet
- :Sir Richard Wynn, 4th Baronet
- :Sir Robert Salusbury, 1st Baronet
- :Sir Robert Thomas, 1st Baronet
- :Sir Roger de Pulesdon
- :Sir Thomas Powell, 1st Baronet
- :Sir William Owen, 4th Baronet
- :Sirhowy Valley Ridgeway Walk
- :Sirhowy railway station
- :Sisilia Tuipulotu
- :Siwan (play)
- :Siân James (musician)
- :Siân Melangell Dafydd
- :Siôn Ceri
- :Siôn Parry
- :Siôn Tudur
- :Siôn ap Hywel
- :Skenfrith Hundred
- :Skint (2013 TV series)
- :Skomer Marine Conservation Zone
- :Skomer vole
- :Slade Bay
- :Slade Mudstone
- :Sling, Anglesey
- :Snatchwood
- :Snatchwood Halt railway station
- :Snead, Powys
- :Snowsport Cymru/Wales
- :Soar, Anglesey
- :Soar, Gwynedd
- :Soar, Powys
- :Soar Chapel, Hirwaun
- :Social care in Wales
- :Society of the Sacred Cross
- :Sonia Edwards
- :Sonia Lawrence
- :Sonny Gibbon
- :Sonny Lewis
- :Sontley Marsh
- :South Cornelly
- :South Hook Fort
- :South Pembrokeshire Hospital
- :South Pit Halt railway station
- :South Stack Cliffs RSPB reserve
- :South Stack Formation
- :South Wales Aviation Museum
- :South Wales Bible Training Institute
- :South Wales Business School
- :South Wales Guardian
- :South Wales Institute of Engineers
- :South Wales Joint Scientific Investigation Unit
- :South Wales Police and Crime Commissioner
- :South Wales Record Society
- :South Wales Senior League
- :South Wales Socialist Society
- :South West Wales Integrated Transport Consortium
- :South West Wales Publications
- :Southend railway station (Mumbles)
- :Southerndown
- :Southerndown Golf Club
- :Southsea, Wrexham
- :Spencer Ellis
- :Spike (Welsh guitarist)
- :Spinnies, Aberogwen
- :Spring Quarry Limestone
- :St-y-Nyll Platform railway station
- :St. Julian's railway bridge
- :St. Maughan's Formation
- :St. Melyd Golf Links railway station
- :St Ann's Head Lighthouse
- :St Anne's Church, Cefn Hengoed
- :St Arvans
- :St Asaph City F.C.
- :St Asaph railway station
- :St Athan Road
- :St Briavels railway station
- :St Brides-super-Ely
- :St Brides Bay
- :St Brides Major
- :St Brides Wentloog
- :St Cadocs/Penygarn
- :St Catherine's Church, Llanfaes
- :St Cawrdaf's Church, Llangoed
- :St Ceinwen's Church, Llangeinwen
- :St Cenydd Comprehensive School
- :St Clare's School, Newton
- :St Clears railway station
- :St Cyngar's Church, Llangefni
- :St David's Church, Abergwili
- :St David's Church, Bettws
- :St David's College, Llandudno
- :St David's Head
- :St David's Welsh Church, Rhosllanerchrugog
- :St David Awards
- :St Davids Lifeboat Station
- :St Deiniol's Church, Criccieth
- :St Dials
- :St Donats
- :St Dwywe's Church
- :St Dyfnan's Church, Llanddyfnan
- :St Dyfrig's Church, Treforest
- :St Elidan's Church, Llanelidan
- :St Elli Church, Llanelli
- :St Garmon's Church, Capel Garmon
- :St George, Conwy
- :St Gwenfaen's Church, Rhoscolyn
- :St Harmon
- :St Harmons railway station
- :St Hilary's Chapel
- :St Illtyd's Church, Llanhilleth
- :St Illtyd's Motte
- :St Ishmael, Carmarthenshire
- :St James's Church, Manorbier
- :St James's Church, Pyle
- :St John's Church, Dowlais
- :St John's Church, Maindee
- :St John's Church, Trofarth
- :St John's College, Cardiff
- :St John Lloyd Catholic Comprehensive School
- :St John the Evangelist's Church, Mold
- :St Joseph's Roman Catholic Church, Colwyn Bay
- :St Jude's Church, Swansea
- :St Llwydian's Church, Heneglwys
- :St Maelog's Church, Llanfaelog
- :St Mary's Church, Cardigan
- :St Mary's Church, Coity Higher
- :St Mary's Church, Glyntaff
- :St Mary's Church, Kidwelly
- :St Mary's Church, Llannerch-y-medd
- :St Mary's Church, Llanrwst
- :St Mary's Church, Maestir
- :St Mary's Church, Menai Bridge
- :St Mary's Church, Northop Hall
- :St Mary's and St Nicholas's Church, Beaumaris
- :St Matthew's Church, Abernant
- :St Maughans
- :St Michael's Church, Brynford
- :St Michael's Church, Llanfihangel Din Sylwy
- :St Michael's Church, Penbryn
- :St Michael's Church, Penrhoslligwy
- :St Michael's Church, Pillgwenlly
- :St Morhaiarn's Church, Gwalchmai
- :St Nicholas, Vale of Glamorgan
- :St Nicholas and Bonvilston
- :St Peter's Church, Newborough
- :St Rhwydrys's Church, Llanrhwydrys
- :St Richard Gwyn Catholic High School, Barry
- :St Sadwrn's Church, Llansadwrn
- :St Tathan's Church
- :St Tudwal's Lighthouse
- :St Tysilio's Church, Menai Bridge
- :St Winefride's Halt railway station
- :Stac Rhos
- :Stafford Common
- :Stan Davies
- :Stan Morgan
- :Stan Stennett
- :Stanley Leigh
- :Stanley Powell
- :Stanleytown, Rhondda Cynon Taf
- :Stanner Halt railway station
- :Stanner Rocks
- :Star Crossing Halt railway station
- :Statue of David Lloyd George, Parliament Square
- :Steel Company of Wales
- :Steff Evans
- :Steffan Thomas
- :Stephanie Burgis
- :Stephanie Williams (Welsh footballer)
- :Stephen Bayley
- :Stephen Clarke (archaeologist)
- :Stephen Gomes
- :Stephen J. Bush
- :Stephen N. Williams
- :Stephen Parry (Welsh MP)
- :Stephen Patrington
- :Stephen Pugh
- :Stephen Terry
- :Steve Doyle
- :Steve Harris (bowls)
- :Steve Hill (bowls)
- :Steve James (Christian musician)
- :Steve Jones (footballer, born 1964)
- :Steve Mackreth
- :Steve Scott (footballer)
- :Steve Witherden
- :Stormy Down
- :Storws Wen Golf Club
- :Stradey
- :Strumble Head - Llechdafad Cliffs
- :Stryd-y-Facsen
- :Stryt Las a'r Hafod
- :Stuart Bell (bishop)
- :Stuart Cornes
- :Stuart Gallacher
- :Stuart James Hutchings
- :Stuart Parfitt
- :Stuart Russell (rugby union)
- :Studia Celtica
- :Sue Pinnington
- :Sugar Loaf, Carmarthenshire
- :Sulien
- :Sully Beds
- :Sully and Lavernock
- :Summit tram stop
- :Sun Bank Halt railway station
- :SuperDragons
- :Superintendent registrar
- :Surf Life Saving Association of Wales
- :Sutton, Vale of Glamorgan
- :Sutton stone
- :Swansea Bay Sea School
- :Swansea Bay railway station
- :Swansea Borough Police
- :Swansea Central police station
- :Swansea County Borough Council
- :Swansea East Dock railway station
- :Swansea Festival of Music and the Arts
- :Swansea Herald of Wales
- :Swansea History Journal
- :Swansea Indoor Bowls Stadium
- :Swansea Mosque
- :Swansea Pride
- :Swansea Riverside railway station
- :Swansea St Thomas railway station
- :Swansea Vale
- :Swansea Valley
- :Swansea Victoria railway station
- :Swansea Wind Street railway station
- :Swansea bus station
- :Swellies
- :Swffryd
- :Swim Wales
- :Swiss Valley Reservoir
- :Sydallt
- :Sydney Chappell
- :Sydney Darvell
- :Sygun Copper Mine
- :Sylfaen railway station
- :Synod of Brefi
- :Synod of Victory
- :Sôr Brook
- :T. Glynne Davies
- :T. Harri Jones
- :T. Ifor Rees
- :T. J. Morgan
- :T. James Jones
- :T. Marchant Williams
- :T. Rhys Thomas
- :Table Tennis Association of Wales
- :Taeog
- :Tafarn-y-Gelyn
- :Tafarnaubach
- :Taff Merthyr
- :Tafod y Ddraig
- :Taigwynion
- :Taine Basham
- :Tal-y-bont, Dyffryn Ardudwy
- :Talacre
- :Talacre railway station
- :Talar Wen Quarry
- :Talerddig railway station
- :Talgarreg
- :Talgarth Festival
- :Talley
- :Talley Road Halt railway station
- :Talog, Carmarthenshire
- :Talsarn
- :Talsarnau
- :Talsarnau railway station
- :Talwrn
- :Talybolion
- :Talybont, Bangor
- :Talybont-on-Usk railway station
- :Talybont railway station
- :Talyllyn Junction railway station
- :Tan-y-Bwlch, Aberystwyth
- :Tan-y-Bwlch, Maentwrog
- :Tan-y-groes
- :Tandinas
- :Tanygrisiau railway station
- :Tarian Rhyddid a Dymchwelydd Gormes
- :Tarren y Gesail
- :Tarrenhendre
- :Tasker Milward Voluntary Controlled School
- :Tata Steel United F.C.
- :Tathana
- :Tatws Pum Munud
- :Taylor Bevan
- :Taylor Davies
- :Tecwyn Ifan
- :Tecwyn Jones
- :Ted Regan (footballer)
- :Teddy Pugh
- :Teddy Williams (rugby union)
- :Tegwen Malik
- :Telpyn Point
- :Telyn y Plant
- :Temple of Peace, Cardiff
- :Templeton railway station
- :Temporary licence
- :Tenby Castle
- :Tenby Observer
- :Tennis Wales
- :Tephroseris integrifolia subsp. maritima
- :Terence Robbins
- :Teresa Rees
- :Terry Evans (footballer, born 1976)
- :Terry Monaghan
- :Terry Perdue
- :Terry Shaw (rugby union)
- :Terry Vaughan
- :Teulyddog
- :Teyrnon
- :That's Swansea Bay
- :The Aberdare Times
- :The Aberystwyth Observer
- :The Acid Elephant
- :The Adventures and Vagaries of Twm Shon Catti
- :The Agrarian History of England and Wales
- :The Albert Hall, Llandrindod Wells
- :The Bad Doctor
- :The Barracks, Brecon
- :The Battle to the Weak
- :The Beaufort Hotel, Chepstow
- :The Brecon County Times
- :The Brecon Reporter
- :The Bryn
- :The Cambrian
- :The Cardiff and Merthyr Guardian
- :The Cardigan Bay Visitor
- :The Cardigan Observer
- :The Celtic Gateway
- :The Chepstow Gleaner
- :The Darling Buds
- :The Demetian Mirror
- :The Dingle, Anglesey
- :The Duskeys
- :The Ferret (TV series)
- :The Flash (lake)
- :The Green Dragon, Monmouth
- :The Hennessys
- :The Invader (novel)
- :The Journal of Welsh Religious History
- :The Larches, Monmouthshire
- :The Life and Times of David Lloyd George
- :The Lodge Halt railway station
- :The Lords of Afan
- :The Mayhill Hotel
- :The Merthyr Telegraph
- :The Miners' Next Step
- :The Mule (river)
- :The Myvyrian Archaiology of Wales
- :The NEON
- :The Narth
- :The Newport Review and Monmouthshire Register
- :The North Wales Express
- :The Old Bell Museum
- :The Oval, Caernarfon
- :The Oxford Book of Welsh Verse in English
- :The Pembrokeshire Herald and General Advertiser
- :The People The Poet
- :The Pin Mill
- :The Principality (newspaper)
- :The Rhyl Advertiser
- :The Riverside Hotel, Monmouth
- :The Society of Legal Scholars
- :The Soldier and the Gentlewoman
- :The Take (Welsh band)
- :The Treasury (periodical)
- :The Visitors' List and Guide
- :The Weekly Mail
- :The Welchman
- :The Welsh History Review
- :The Welshman (newspaper)
- :The Wern
- :The Wolves (Bristol Channel)
- :Theatr Brycheiniog
- :Theo Bevacqua
- :Theo Cabango
- :Theophilus Feild
- :Thicker than Water (1993 film)
- :Third Floor Gallery
- :Thomas Babington Jones
- :Thomas Bailey (footballer, born 1904)
- :Thomas Banks (priest)
- :Thomas Bayley Hughes
- :Thomas Beach (poet)
- :Thomas Bek (Bishop of St Davids)
- :Thomas Bevan (priest)
- :Thomas Beynon (archdeacon of Cardigan)
- :Thomas Bird (bishop)
- :Thomas Boden
- :Thomas Britten
- :Thomas Bryan (Welsh footballer)
- :Thomas Buckland
- :Thomas Burnett (footballer)
- :Thomas Carroll Group
- :Thomas Cathern
- :Thomas Charles Edwards
- :Thomas Cordes
- :Thomas Dafydd
- :Thomas Davies (bowls)
- :Thomas Davies (footballer, born 1865)
- :Thomas Duncombe Dee
- :Thomas Evans (archdeacon of Carmarthen)
- :Thomas Fothergill (ironmaster)
- :Thomas Gamage
- :Thomas Griffiths (priest)
- :Thomas Hache II
- :Thomas Haffield
- :Thomas Hopkins (gymnast)
- :Thomas Hughes (bishop)
- :Thomas Huyck
- :Thomas Jenkins (footballer)
- :Thomas John Thomas
- :Thomas Jones, Baron Maelor
- :Thomas Jones (librarian)
- :Thomas Lewis (Welsh politician)
- :Thomas Lewis (footballer)
- :Thomas Lloyd (Dean of Bangor)
- :Thomas Lloyd (bishop)
- :Thomas Lloyd (lexicographer)
- :Thomas McCarthy (footballer)
- :Thomas Meyrick
- :Thomas Myddelton (Lord Mayor of London)
- :Thomas Parry (writer)
- :Thomas Parry Library
- :Thomas Parry Pryce
- :Thomas Phillips (educational benefactor)
- :Thomas Phillips Price
- :Thomas Price (Baptist minister)
- :Thomas Prichard (priest, born 1577)
- :Thomas Prichard (priest, born c. 1591)
- :Thomas Runcorn
- :Thomas Stanoe
- :Thomas Thomas (boxer)
- :Thomas Thomas (harpist)
- :Thomas Vaughan (footballer)
- :Thomas Watson (Bishop of St Davids)
- :Thomas Williams (dean of Bangor)
- :Thomas Williams (dean of Llandaff)
- :Thomas Williams (priest and translator)
- :Thomas Woods (rugby)
- :Thomas Wyndham (of Dunraven Castle)
- :Thomas brothers (mediums)
- :Thomastown, Rhondda Cynon Taf
- :Thornhill, Torfaen
- :Threatmantics
- :Three Cocks Junction railway station
- :Tiaan Thomas-Wheeler
- :Tiger Please
- :Tim Fauvel
- :Timeline of Llanelli history
- :Tiny Rebel
- :Tipit
- :Tir-Phil
- :Tir-Phil railway station
- :Tir Cymen
- :Tir Iarll
- :Tir Newydd
- :Tirabad
- :Tircoed forest village
- :Tirymynach
- :Titus Lewis
- :Titus Zhenje
- :Tivonge Rushesha
- :Tivyside Advertiser
- :Tom Bevan (cricketer)
- :Tom Bryant (harpist)
- :Tom Davies (rugby union, born 1986)
- :Tom Davies (rugby union, born 1993)
- :Tom Edwards (footballer, born 1906)
- :Tom Evans (footballer, born 1903)
- :Tom Giffard
- :Tom Hewitt (footballer)
- :Tom Ingleby
- :Tom Macdonald (writer)
- :Tom Richards (athlete)
- :Tom Rogers (rugby union)
- :Tom Singh
- :Tom Sparrow (Welsh footballer)
- :Tom Williams (rugby union, born 1991)
- :Tom Williams (rugby union, born 1996)
- :Tomas ap Rhodri
- :Tomi Lewis
- :Tommy Lewis (footballer)
- :Tommy Matthias
- :Tommy Mills (footballer)
- :Tommy Weale
- :Ton Llwyd Halt railway station
- :Ton Pentre railway station
- :Tonfanau
- :Tonmawr
- :Tonmawr Junction railway station
- :Tony Adams (actor)
- :Tony Clement (rugby union)
- :Tony Conran
- :Tony Copsey
- :Tony Curtis (Welsh poet)
- :Tony Day
- :Tony Fisher (rugby)
- :Tonypandy railway station
- :Tonyrefail railway station
- :Top-y-Fron Hall
- :Tor y Foel
- :Torin Myhill
- :Torllwyn
- :Towyn
- :Trac: Music Traditions Wales
- :Traed mewn cyffion
- :Traethodl
- :Trallong
- :Trallwn
- :Transactions of the Honourable Society of Cymmrodorion
- :Transport (Wales) Act 2006
- :Trap, Carmarthenshire
- :Trawsfynydd Lake Halt railway station
- :Trawsnant
- :Tre-Castell
- :Tre-Wen
- :Tre-Ysgawen
- :Trearddur Bay United F.C.
- :Treasons in Wales Act 1540
- :Treaty of Pipton
- :Trebanog F.C.
- :Trebanos (electoral ward)
- :Trebedw
- :Treberth
- :Treboeth
- :Trecastell
- :Trecastle
- :Trecenydd
- :Trecynon Halt railway station
- :Tredegar House Country Park
- :Tredegar Park, Newport
- :Tredodridge
- :Treetops Shooting Ground
- :Trefarthen
- :Trefawr Formation
- :Trefawr Track
- :Trefdraeth
- :Trefeglwys
- :Trefeiddan Moor
- :Trefeinon railway station
- :Trefeurig
- :Treffynnon, Pembrokeshire
- :Treflys
- :Trefnant
- :Trefnant railway station
- :Trefor, Anglesey
- :Trefor, Gwynedd
- :Trefor Morris
- :Treforest Halt railway station
- :Treforest High Level railway station
- :Treforgan
- :Tregare
- :Tregaron Turfs F.C.
- :Tregarth railway station
- :Tregele
- :Tregroes
- :Trehafod railway station
- :Treharris
- :Treharris Athletic Western F.C.
- :Treherbert BGC
- :Treiorwerth Formation
- :Trelawnyd
- :Trelawnyd and Gwaenysgor
- :Trelech
- :Trelewis
- :Trelewis Halt railway station
- :Trelewis Welfare F.C.
- :Trelogan
- :Tremadog Bay
- :Tremorfa
- :Treowen Halt railway station
- :Trerhyngyll
- :Trethomas railway station
- :Tretower
- :Treuddyn
- :Trevalyn Hall
- :Trevethin
- :Trevor railway station
- :Trewern
- :Trewyddfa
- :Trezza Azzopardi
- :Triffyn Farfog
- :Triffyn ap Rhain
- :Trimsaran Road railway station
- :Trinant
- :Troed-y-rhiw-Sion
- :Troed-y-rhiw railway station
- :Troed-yr-hen-riw
- :Troed y Rhiw
- :Troedrhiwffenyd
- :Troedyraur
- :Troedyrhifuwch Halt railway station
- :Trowbridge, Cardiff
- :Trum y Ddysgl
- :Trum y Gwragedd
- :Trwyn yr Wylfa
- :Trychrug
- :Tryfil
- :Tu Hwnt i'r Bont
- :Tudor Brewery
- :Tudor Martin
- :Tudor Thomas
- :Tudur ap Gwyn Hagr
- :Tudwal Gloff
- :Tusker Rock
- :Twm Morys
- :Twmpa
- :Twmpath
- :Two Locks
- :Twrcelyn
- :Twrcelyn Rural District
- :Twyn-yr-Odyn
- :Ty'n-y-graig
- :Ty'n-yr-eithin
- :Ty-coch Halt railway station
- :Ty Du Moor
- :Ty Formation
- :Ty Glas railway station
- :Ty Mawr Burial Chamber
- :Tybroughton
- :Tycoch
- :Tyddyn Bridge Halt railway station
- :Tyddyn Dai
- :Tydfil Wildcats Rugby League
- :Tyfanog
- :Tyfei
- :Tygwyn railway station
- :Tyla Garw
- :Tylacoch Halt railway station
- :Tylorstown railway station
- :Tylwch
- :Tylwch railway station
- :Tyn-y-Coed Farmhouse
- :Tyn-y-Gongl
- :Tyn-y-nant
- :Tyncelyn
- :Tyneio
- :Tynewydd, Ceredigion
- :Tynewydd Colliery disaster
- :Tynycwm Halt railway station
- :Tywyn railway station
- :Tywysog
- :Tŵr Mawr Lighthouse
- :Tŷ-Newydd, Ceredigion
- :Tŷ-llwyd
- :Tŷ Canol National Nature Reserve
- :Tŷ Croes
- :Tŷ Glyn
- :Tŷ Siamas
- :Ucheldre Centre
- :Udgorn Seion
- :Umbrafel
- :Unbennaeth Prydain
- :Undeb Cenedlaethol Athrawon Cymru
- :Underwater Hockey Wales
- :Undy A.F.C.
- :Ungoed Jacob
- :Union Bank (Pembrokeshire)
- :United Nations Association Wales
- :University of Wales Press
- :Upland Arms
- :Upper Bank railway station
- :Upper Borth
- :Upper Chapel, Powys
- :Upper Church Village
- :Upper Clydach River
- :Upper Cwmbran
- :Upton Chapel
- :Uriah Goodwin
- :Usk Hundred
- :Usk Inlier
- :Usk RFC
- :Usk Reservoir
- :Uskmouth
- :Uskside Foundry
- :Ustig
- :Uwch Conwy
- :Uwchaled Rural District
- :Vale of Clwyd and Conwy Football League
- :Vale of Conwy Football League
- :Vale of Ffestiniog
- :Vale of Grwyney
- :Vale of Montgomery
- :Valerie Mullins
- :Valeways Millennium Heritage Trail
- :Valley, Anglesey
- :Valley Rural District
- :Valley Station Signal Box, Anglesey
- :Valleys Radio
- :Van, Caerphilly
- :Van, Llanidloes
- :Van Railway
- :Varteg
- :Vaughan Rees
- :Vaughan Thomas (rowing)
- :Velindre University NHS Trust
- :Velothon Wales
- :Venissa Head
- :Vic Perrins
- :Vicarage Crossing Halt railway station
- :Vicarage Field, Aberystwyth
- :Vicarage Meadows
- :Vicarage Moss
- :Victor Erle Nash-Williams
- :Victoria, Newport
- :Victoria Hotel, Menai Bridge
- :Victoria Road, Port Talbot
- :Vincent Lloyd-Jones
- :Violet Skies
- :Vivian Teed
- :Voco St David's Cardiff Hotel
- :W. J. Gruffydd (Elerydd)
- :WWT Llanelli Wetlands Centre
- :Waen
- :Wainfelin
- :Wales Ape and Monkey Sanctuary
- :Wales Challenge
- :Wales Council for Voluntary Action
- :Wales Golf
- :Wales International Film Festival
- :Wales Live
- :Wales National Ice Rink
- :Wales Netball
- :Wales Social Partners Unit
- :Wales This Week
- :Wales Week in New York
- :Wales men's national field hockey team
- :Wales men's national volleyball team
- :Wales national badminton team
- :Wales national korfball team
- :Wales national netball team
- :Wales national semi-professional football team
- :Wales national under-18 rugby union team
- :Wales on the Menu
- :Wales women's national basketball team
- :Wales women's national ice hockey team
- :Wales women's national rugby sevens team
- :Wales women's national under-17 football team
- :Wallis Moor
- :Wallis Walters
- :Wallog
- :Walter Davies (footballer)
- :Walter Hugh Roberts
- :Walter Jones (priest)
- :Walter Morgan (priest)
- :Walter Vaughan (MP for Carmarthenshire)
- :Walter Wilkins (1741–1828)
- :Walter Wilkins (d. 1840)
- :Walter Williams (rugby union)
- :Walter of Gloucester
- :Walterston
- :Walton, Powys
- :Waroch I
- :Watcyn Clywedog
- :Watcyn Thomas
- :Waterloo, Caerphilly
- :Waterloo Bridge, Betws-y-Coed
- :Waterloo Halt railway station
- :Waterloo Rovers F.C.
- :Waterton, Bridgend
- :Watkin Herbert
- :Watkin William Price
- :Watkin Williams (Flint MP)
- :Watkin Williams (bishop)
- :Watton (B&MR) railway station
- :Wattstown Platform railway station
- :Wattsville F.C.
- :Watwick Point Beacon
- :Waun-Ddu
- :Waun-fawr, Cefn Cribwr
- :Waun-oer
- :Waun Camddwr
- :Waun Cimla
- :Waun Fawr, Puncheston
- :Waun Garnedd-y-filiast
- :Waunarlwydd
- :Waunfawr
- :Waunfawr, Carmarthenshire
- :Waunifor
- :Way Beyond Blue
- :Wayne Evans (Welsh footballer)
- :Wayne Hall (rugby union)
- :Wayne Proctor
- :Weaver building
- :Wedi 3
- :Weissia multicapsularis
- :Welsh-language comics
- :Welsh Academy English–Welsh Dictionary
- :Welsh Air Service
- :Welsh Alliance League
- :Welsh Archaeological Trusts
- :Welsh Archery Association
- :Welsh Association of Sub Aqua Clubs
- :Welsh Automotive Forum
- :Welsh Book Studies
- :Welsh Borderland Fault System
- :Welsh Bowling Association
- :Welsh Bowls Federation
- :Welsh Boys Too
- :Welsh Centre for International Affairs
- :Welsh Champion Hurdle
- :Welsh Chileans
- :Welsh Comedy Festival
- :Welsh Cricket Association
- :Welsh Crown Green Bowling Association
- :Welsh Cycling
- :Welsh Dragon (passenger train)
- :Welsh Federation of Coarse Anglers
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- :Welsh Football Trust
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- :Welsh Hook Halt railway station
- :Welsh Indoor Bowls Association
- :Welsh International Open
- :Welsh Lacrosse Association
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- :Welsh Learner of the Year
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- :Welsh Pétanque Association
- :Welsh Records Panel
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- :Welsh Salmon and Trout Angling Association
- :Welsh School of Architectural Glass
- :Welsh Short Mat Bowls Association
- :Welsh Socialist Republican Movement
- :Welsh Sports Association
- :Welsh Surfing Federation
- :Welsh Target Shooting Federation
- :Welsh Women's Aid
- :Welsh Women's Bowling Association
- :Welsh Women's Open Stroke Play Championship
- :Welsh Wood
- :Welsh folklore
- :Welsh football league system
- :Welsh hook
- :Welsh studies
- :Welshpool Raven Square railway station
- :Welshpool Seven Stars Halt railway station
- :Wenallt
- :Wenallt Camp
- :Wenallt Formation
- :Wentloog Hundred
- :Wentlooge
- :Wenvoe Castle Golf Club
- :Wenvoe railway station
- :Wepre Park
- :Wernbongam Stream Section and Quarry
- :Werthyr standing stone
- :Wes Packer
- :West Blockhouse Point Beacons
- :West Cross railway station
- :West Glamorgan County Council
- :West Midlands Regional Cup
- :West Mill railway station
- :West Mouse
- :West Wales Museum of Childhood
- :West Wales Premier League
- :Western Brittonic languages
- :Western Mostyn Colliery Company
- :Western Telegraph
- :Westerne
- :Westminster Rovers F.C.
- :Wethenoc
- :Whelston
- :Whetstones (stone circle)
- :Whitchurch & Tongwynlais
- :Whitchurch Golf Club
- :White Grit
- :White Hart Halt railway station
- :Whitebrook Halt railway station
- :Whiteford National Nature Reserve
- :Whitehill Down
- :Whitehurst Halt railway station
- :Whitford, Flintshire
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- :Whitton, Powys
- :Wickedly Welsh Chocolate
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- :Wildmill
- :Wildmill railway station
- :Wilf James
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- :Will Griffiths (rugby union)
- :Will Jones (rugby union)
- :Will Reed
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- :William Almer
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- :William Beaw
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- :William Bell (Welsh footballer)
- :William Bottlesham
- :William Bruce Knight
- :William Butler (footballer)
- :William Colchester
- :William Crawley (priest)
- :William Dafydd
- :William Davey
- :William David Owen
- :William Edward Powell
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- :William Finney
- :William Fletcher (priest)
- :William Foulkes (footballer, born 1863)
- :William Glyn (bishop)
- :William Glynne (MP)
- :William Glynne (priest)
- :William Harrison (Welsh footballer)
- :William Henry Yelverton
- :William Herbert, 2nd Earl of Pembroke
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- :William Herring
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- :William Jones (college principal)
- :William Jones (dean of Brecon)
- :William Jones (novel)
- :William Lewis, 3rd Baron Merthyr
- :William Lewis (mineralogist)
- :William Llewelyn Davies
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- :William Lloyd Phillips
- :William Morgan (cricketer, born 1862)
- :William Mostyn (priest)
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- :William Nock (footballer)
- :William Owen (priest)
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- :William Rees-Thomas
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- :William Roberts (priest)
- :William Roberts Jones
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- :Wrexham Archives and Local Studies
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- :Wyndham Halt railway station
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- :X Music Festival
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- :Ynyscedwyn Ironworks
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- :Ynysddu railway station
- :Ynyslas
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- :Ynyswen
- :Ynyswen railway station
- :Ynysybwl Athletic A.F.C.
- :Ynysybwl and Coed-y-Cwm
- :Yr Amgueddfa
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- :Ysgol Gyfun Gymraeg Bryn Tawe
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- :Ysgol Gymraeg Bro Morgannwg
- :Ysgol Gymraeg Dewi Sant, Llanelli
- :Ysgol Gymraeg Gilfach Fargod
- :Ysgol Henry Richard
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- :Ysgol Syr Hugh Owen
- :Ysgol Syr Thomas Jones
- :Ysgol Tre-Gib
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- :Ysgol y Berwyn
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- :Ysgol y Gader
- :Ysgol y Strade
- :Ysgubor-y-coed
- :Ysguborwen
- :Ysgyryd Fach
- :Ystalyfera railway station
- :Ystrad Aeron
- :Ystrad Einion
- :Ystrad Fflur
- :Ystrad Mynach College
- :Ystrad Mynach Hospital
- :Ystrad Peithyll
- :Ystrad Rhondda railway station
- :Ystrad Tywi
- :Ystradgynlais railway station
- :Ystradowen
- :Ystradowen railway station
- :Ystradyfodwg School Board
- :Ystumtuen
- :Ystwyth Trail
- :Ỽ
- :Pembrokeshire Dangler
- :1980 Welsh Professional Championship
- :1981 Welsh Professional Championship
- :2015–16 Swansea City A.F.C. season
- :2017–18 Welsh League Cup
- :2020–21 Welsh Premier Women's League
- :2021–22 Adran Trophy
- :2022–23 Adran Trophy
- :2022–23 Cymru North
- :2022–23 Cymru South
- :2022–23 FAW Women's Cup
- :2023 Plaid Cymru leadership election
- :2023–24 Swansea City A.F.C. season
- :2024–25 Wrexham A.F.C. season
- :Aber Llwchwr
- :Alis Huws
- :Andrzej Jackowski
- :Annie Williams (painter)
- :Arfon Jones
- :Battle of Argoed Llwyfain
- :Becky Gittins
- :Ben Thomas (bowls)
- :Benton Volcanic Group
- :Bethan Russ
- :Blair Murray
- :Bridgend Schools FA
- :British & Irish Lions (women)
- :Bryn Bradley
- :C.P.D. Felinfach
- :Caerphilly Athletic F.C.
- :Canton RFC
- :Cefn Fforest A.F.C.
- :Cefn Mawr Rangers F.C.
- :Central Wales Orefield
- :Claire Hughes
- :Clifford Williams (politician)
- :Clinton Purnell
- :Clydach F.C.
- :Coblyn
- :Colin Noon
- :Dafydd Davis
- :Dai Davies (trade unionist)
- :Deborah Manship
- :Ednyfed Hudson Davies
- :Emily Thomas (gymnast)
- :Ernest Bennett (politician)
- :Ewenny Road drill hall, Maesteg
- :FAW Elite Futsal League
- :Fforest (Carmarthenshire)
- :Gareth Furlong
- :Gareth Miles
- :George Barker (British politician)
- :George Daggar
- :Gill Miles
- :Gracie Griffiths
- :Gruffudd ab yr Ynad Coch
- :Gweirca ferch Owain
- :Gwrthwl
- :Gwyneth Glyn
- :Hamilton baronets of Trebinshun House (1819)
- :Harold Finch
- :Heartsease, Llanddewi Ystradenni
- :Helen Prothero-Lewis
- :Hugh Hughes (trade unionist)
- :Ian Slade
- :Idwal Jones (politician)
- :Iorwerth Thomas
- :Irene James
- :Jackie Pottinger
- :Jake Dodd
- :James Edmunds (British politician)
- :James Munkley
- :James Walker (Labour politician)
- :Jess Sims
- :Jo Lloyd
- :John Evans (Ogmore MP)
- :John Henry Williams (politician)
- :John Thomson (bowls)
- :Leon Stanfield
- :Les Morgan
- :Llandudno Athletic F.C.
- :Llanfyllin Town F.C.
- :Llanymynech F.C.
- :Llyn Traffwll
- :Macs Page
- :Martin Selway
- :Matt Crocker
- :Miss Universe Great Britain 2024
- :Montgomeryshire Challenge Cup
- :Morgan Jones (British politician)
- :NEWFA Challenge Cup
- :NEWFA Junior Cup
- :NFA F.C.
- :Norah Dunphy
- :Owen Hesketh
- :Penybont United F.C.
- :Peter Lawlor (cricketer)
- :Pwyll ap Siôn
- :Quar Park Rangers F.C.
- :Radnorshire Challenge Cup
- :Ragged School F.C.
- :Rhiwlas Limestone
- :Rhys Cain
- :Richard Flower (martyr)
- :Richard Pryse (of Gogerddan)
- :Robert Richards (Welsh politician)
- :Rory Pitman
- :Rupert Shipperley
- :Sam Fisher (cyclist)
- :Sara Nicholls
- :Sarah Mansbridge
- :Sean McGoldrick
- :Sir John Thomas, 1st Baronet
- :Sker Point
- :South Wales League
- :St Thomas Church, Swansea
- :Talgarth Town F.C.
- :Ted Williams (politician)
- :The Norton drill hall, Tenby
- :Thomas Richards (Welsh politician)
- :Tom Middlehurst
- :Torsten Bell
- :Tyfaelog
- :Tyrone Powell
- :Val Lloyd
- :Valleys Gateway
- :Welsh League North
- :Will John (politician)
- :William Edwards (British politician)
- :William Jenkins (Labour politician)
- :Win Griffiths
- :Zak Lee-Green
List-Class
- :2019 in Wales
- :Districts of Wales
- :Family tree of Welsh monarchs
- :Iron Age tribes in Britain
- :List of English words of Welsh origin
- :List of Welsh flags
- :List of Welsh inventions and discoveries
- :List of Welsh people
- :List of Welsh women
- :List of built-up areas in Wales by population
- :List of cities in Wales
- :List of communities in Wales
- :List of companies of Wales
- :List of first ministers of Wales
- :List of islands of Wales
- :List of museums in Wales
- :List of rulers in Wales
- :List of tourist attractions in Wales
- :List of towns in Wales
- :Lists of places in Wales
- :Lists of scheduled monuments in Wales
- :Members of the 4th National Assembly for Wales
- :Outline of Wales
- :Richard Burton on stage, screen, radio and record
- :1720s in Wales
- :1724 in Wales
- :1732 in Wales
- :1740 in Wales
- :1741 in Wales
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- :1749 in Wales
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- :1751 in Wales
- :1752 in Wales
- :1753 in Wales
- :1754 in Wales
- :1755 in Wales
- :1756 in Wales
- :1757 in Wales
- :1758 in Wales
- :1759 in Wales
- :1760 in Wales
- :1761 in Wales
- :1762 in Wales
- :1763 in Wales
- :1764 in Wales
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- :1766 in Wales
- :1767 in Wales
- :1768 in Wales
- :1769 in Wales
- :1961 in Wales
- :2009 in Wales
- :2018 Six Nations Championship
- :A roads in Zone 4 of the Great Britain numbering scheme
- :A roads in Zone 5 of the Great Britain numbering scheme
- :B roads in Zone 4 of the Great Britain numbering scheme
- :Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales
- :Food and drink industry of Wales
- :Grade I listed buildings in the Vale of Glamorgan
- :High Sheriff of Carmarthenshire
- :High Sheriff of Denbighshire
- :High Sheriff of Flintshire
- :High Sheriff of Gwynedd
- :High Sheriff of Montgomeryshire
- :High Sheriff of Powys
- :History of rugby union matches between Wales and the Barbarians
- :LL postcode area
- :List of Anglo-Welsh wars
- :List of Blue Flag Beaches of Wales
- :List of Cadw properties
- :List of Celtic deities
- :List of MPs for constituencies in Wales (2001–2005)
- :List of MPs for constituencies in Wales (2005–2010)
- :List of MPs for constituencies in Wales (2015–2017)
- :List of MPs for constituencies in Wales (2017–2019)
- :List of Plaid Cymru MSs
- :List of Roman-to-modern scheduled monuments in Powys (Brecknockshire)
- :List of Roman-to-modern scheduled monuments in Powys (Montgomeryshire)
- :List of Roman-to-modern scheduled monuments in Powys (Radnorshire)
- :List of Roman villas in Wales
- :List of Sites of Special Scientific Interest in Anglesey
- :List of Sites of Special Scientific Interest in Conwy County Borough
- :List of Sites of Special Scientific Interest in Denbighshire
- :List of Sites of Special Scientific Interest in Flintshire
- :List of Sites of Special Scientific Interest in Gwynedd
- :List of Sites of Special Scientific Interest in Neath Port Talbot
- :List of Sites of Special Scientific Interest in Newport
- :List of Sites of Special Scientific Interest in Swansea
- :List of Sites of Special Scientific Interest in Torfaen
- :List of Sites of Special Scientific Interest in Wrexham County Borough
- :List of Sites of Special Scientific Interest in the Vale of Glamorgan
- :List of Valley Lines stations
- :List of Welsh-language authors
- :List of Welsh-language poets (6th century to c. 1600)
- :List of Welsh-language programmes
- :List of Welsh Americans
- :List of Welsh Governments
- :List of Welsh areas by percentage of Welsh-speakers
- :List of Welsh artists
- :List of Welsh medical pioneers
- :List of Welsh saints
- :List of Welsh women writers
- :List of Welsh writers
- :List of bridges in Wales
- :List of castles in Wales
- :List of cathedrals in Wales
- :List of churches in Anglesey
- :List of churches in Conwy
- :List of churches in Denbighshire
- :List of churches in Flintshire
- :List of churches in Gwynedd
- :List of churches in Powys
- :List of collieries in the Rhondda Valleys
- :List of counties of England and Wales in 1964 by highest point
- :List of counties of England by population in 1981
- :List of counties of Wales by area in 1831
- :List of counties of Wales by population in 1971
- :List of cultural venues in Cardiff
- :List of cycle routes in Wales
- :List of football clubs in Wales
- :List of highest mountains in Wales
- :List of historic counties of Wales by area in 1891
- :List of hospitals in Wales
- :List of ironworks in Wales
- :List of killings by law enforcement officers in the United Kingdom
- :List of lakes of Wales
- :List of lighthouses in Wales
- :List of mayors of Cardiff
- :List of members of the Senedd
- :List of monastic houses in Wales
- :List of people from Cardiff
- :List of places in Anglesey
- :List of places in Cardiff
- :List of places in Ceredigion
- :List of places in Gwynedd
- :List of places in Pembrokeshire
- :List of places in Pembrokeshire (categorised)
- :List of political parties in Wales
- :List of power stations in Wales
- :List of prehistoric scheduled monuments in Powys (Montgomeryshire)
- :List of prehistoric scheduled monuments in Powys (Radnorshire)
- :List of prehistoric scheduled monuments in north Pembrokeshire
- :List of proposed railway stations in Wales
- :List of railway stations in Cardiff
- :List of railway stations in Wales
- :List of restaurants in Wales
- :List of rivers of Wales
- :List of sheriffs of Anglesey
- :List of shipwrecks in the Bristol Channel
- :List of sport venues in Cardiff
- :List of sports governing bodies in Wales
- :List of statutory instruments of the Welsh Assembly
- :List of statutory instruments of the Welsh Assembly, 2007
- :List of statutory instruments of the Welsh Assembly, 2008
- :List of theatres in Wales
- :List of town walls in England and Wales
- :List of tramroads in South Wales
- :List of universities in Wales
- :List of wars in Great Britain
- :List of waterfalls in Wales
- :List of women artists associated with Wales
- :Listed buildings in Cardiff
- :Listed buildings in Wales
- :Listed buildings in the Vale of Glamorgan
- :Lists of schools in Wales
- :Lloyd baronets
- :Members of the 5th National Assembly for Wales
- :Opinion polling on Welsh independence
- :Peerage of Great Britain
- :Prehistoric settlement of the British Isles
- :Second Jones government
- :Sheriff of Caernarvonshire
- :Sheriff of Monmouthshire
- :Timeline of the COVID-19 pandemic in Wales (2020)
- :Wales national rugby league team match results
- :Welsh exonyms
- :Welsh peers and baronets
- :Welsh place names in other countries
- :100 Welsh Heroes
- :14th century in Wales
- :1700 in Wales
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- :1721 in Wales
- :1726 in Wales
- :1727 in Wales
- :1737 in Wales
- :1895 Glamorgan County Council election
- :1901 Cardiganshire County Council election
- :1904 Glamorgan County Council election
- :1904 in Wales
- :1905 Aberdare Urban District Council election
- :1907 Cardiganshire County Council election
- :1907 Glamorgan County Council election
- :1907 in Wales
- :1910 Cardiganshire County Council election
- :1913 Cardiganshire County Council election
- :1935–36 Welsh Cup
- :1936–37 Welsh Cup
- :1937–38 Welsh Cup
- :1938–39 Welsh Cup
- :1945 in Wales
- :1968 in Wales
- :1973 in Wales
- :1976 Argentina rugby union tour of Wales and England
- :1978 Argentina rugby union tour of Britain, Ireland and Italy
- :1990 Argentina rugby union tour of British Isles
- :1990 in Wales
- :1997 United Kingdom general election in Wales
- :1998 Argentina rugby union tour of Japan and Europe
- :2001 Argentina rugby union tour of New Zealand and Great Britain
- :2005 United Kingdom general election in Wales
- :2006 in Wales
- :2012 in Wales
- :2013 in Wales
- :2014 European Cup
- :2018 Six Nations Championship squads
- :2020 in Wales
- :2020–21 Scarlets season
- :2021 Six Nations Championship squads
- :2021 in Wales
- :2024 in Wales
- :Archdeacon of St Asaph
- :Archdeacon of St Davids
- :Armorial of the Church in Wales
- :Armorial of the United Kingdom
- :B roads in Zone 5 of the Great Britain numbering scheme
- :Beddoe
- :Beddoes
- :Bibliography of King Arthur
- :Bibliography of Welsh history
- :Bibliography of the Vale of Glamorgan
- :Britain in the Middle Ages
- :Cardiff North (UK Parliament constituency)
- :Cardiff West (UK Parliament constituency)
- :Catholic chaplaincies in England and Wales
- :Crowther
- :Cultural depictions of Charles III
- :Custos Rotulorum of Brecknockshire
- :Custos Rotulorum of Carmarthenshire
- :Custos Rotulorum of Denbighshire
- :Custos Rotulorum of Flintshire
- :Custos Rotulorum of Glamorgan
- :Custos Rotulorum of Merionethshire
- :Custos Rotulorum of Montgomeryshire
- :Custos Rotulorum of Pembrokeshire
- :Custos rotulorum
- :Einion
- :Ellis
- :Emrys
- :Emyr Humphreys bibliography
- :Garter Principal King of Arms
- :Geraint (given name)
- :Grade II* listed buildings in Anglesey
- :Grade II* listed buildings in Blaenau Gwent
- :Grade II* listed buildings in Bridgend County Borough
- :Grade II* listed buildings in Caerphilly County Borough
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- :Dyrnwyn
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- :Robert Evans (Dean of Bangor)
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- :Summerhill, Swansea
- :Talgarth (Powys) railway station
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- :1936-37 Newport County A.F.C. season
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- :Category:19th century Welsh people
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- :A4081 road
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- :Alice the White
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- :Alltwen, Conwy
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- :Category:Ancient Britons
- :Anna Eliza Williams
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- :Arthog – Caerdeon Fault
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- :B. M. Gill
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- :Baglan Energy Park
- :Bala (Llyn Tegid) railway station
- :Bala railway station
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- :Beech Hill Fault
- :Bellstone quarry
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- :Beth Reeks
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- :Bettws Fault
- :Bettws Garmon railway station
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- :Blaenavon Fault
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- :Blaenhirwaun Thrust
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- :Bryn-y-maen Fault
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- :Brynderi Fault
- :Brynglas House
- :Bryngwili Fault
- :Bryngwyn Fault
- :Brynsiencyn
- :Category:Brythonic tribes
- :Bwlchgwyn Fault
- :Bylchau Fault
- :Cacen gri
- :Cae Parc Fault
- :Caer Llan Wood
- :Caerdeon Bodlyn Fault
- :Caergwrle Fault
- :Caerleon Fault
- :Caerleon University
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- :Camdwr Fault
- :Capel Garmon Fault
- :Capel Heol Dwr, Carmarthen
- :Cardiff Bay (The Flourish) railway station
- :Cardiff City F.C. personnel
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- :Cardiff and The Vale of Glamorgan Scout Area (The Scout Association)
- :Cardigan - Fishguard Fault Belt
- :Cardiganshire League First Division
- :Care Council for Wales
- :Carmarthenshire Scout Area (The Scout Association)
- :Carmel Fault (Carmarthenshire)
- :Carmel Fault (Powys)
- :Carnarvon Morfa railway station
- :Carnarvon Pant railway station
- :Carnedd Iago
- :Carnglas
- :Carreg y Diocyn
- :Carrog Valley Fault
- :Casnewydd
- :Castell, Denbighshire
- :Castell Fault
- :Cefn Bryn Thrust
- :Cefn Crib Fault
- :Cefn Fault
- :Cefn Garw Fault
- :Cefn Ila Fault
- :Cefn quarry
- :Cefnamwlch-Rhiw Fault
- :Ceidio Fault
- :Cerrig y Gwyddyl
- :Cerrig y Ieirch
- :Ceugant
- :Ceunant Fault
- :Ceunant Llennyrch
- :Chapel Fault
- :Chepstow Fault
- :Cheriton, Swansea
- :Church of St David at Llanthony Priory
- :Church of St Mary, Carmarthen
- :Church of St Theodore, Port Talbot
- :Cilfeigan Fault
- :Cilgerran Castle quarries
- :Cilgerran quarries
- :Cilgerran quarry
- :Civil parishes in Wales
- :Cluniac Houses in Wales
- :Clwyd Fault
- :Clwyd Scout Area (The Scout Association)
- :Clydach Bridge Fault
- :Clydach Ironworks
- :Clywedog Fault
- :Coalbrook Fault
- :Coed-y-paen Fault
- :Coed Hir Fault
- :Coed Ithel Fault
- :Coed y Chwarel quarry
- :Coety Uchaf
- :Colwyn, Wales
- :Template:Communities of Swansea
- :Copper Works Fault
- :Cors-bol Fault
- :Cors Bodgynydd Reservoir
- :Cors Llyn Farch a Llyn Fanod
- :Cosmeston
- :Council for Licensed Conveyancers
- :County court in England and Wales
- :Craig-y-beri Fault
- :Craig-y-glyn Fault
- :Craig Dolfudr
- :Craig Twrch Fault
- :Craig Wen
- :Craig y Benglog
- :Craig yr Hafod
- :Craignant - Milton Fault
- :Craignant Fault
- :Cranogwen
- :Creigydd Fault
- :Crick Fault
- :Cristin ferch Goronwy ab Owain
- :Crockherbtown
- :Crofty
- :Cross Ash Fault
- :Crown Estate in Wales
- :Draft:Crown Office
- :Crychan Fault
- :Crychan Fault Belt
- :Cwm-Mawr Fault
- :Cwm-Pandy quarry
- :Cwm-dows Fault
- :Cwm-felin-Fach
- :Cwm Cayo Brook Fault
- :Cwm Cynnen Fault
- :Cwm Dockin Fault
- :Cwm Dwfnant Fault
- :Cwm Earl Fault
- :Cwm Eigiau quarry
- :Cwm Felin Fault
- :Cwm Gwyn
- :Cwm Pit Fault
- :Cwm Sylwi Fault
- :Cwmcarn Forest Drive
- :Cwmcarvan Fault
- :Cwmderi
- :Cwmgwili, Bronwydd
- :Cwmgwineu Fault
- :Cwmllynfell Fault
- :Cwmmawr Thrust
- :Cwmneol Fault
- :Cymmer Fault
- :Cynefin Bryn Blew
- :Cynheidre Thrust
- :Cynllaith Fault
- :Côr Meibion Pontarddulais
- :D Shed
- :Dandderwen quarry
- :David Davies (author)
- :David Nott Foundation
- :Draft:Death of Carson Price
- :Derwen Fawr
- :Dinas Mawddwy railway station
- :District of Boroughs constituency
- :Dolbadau quarry
- :Dolwyn
- :Domesday Survey
- :Dorothy Squire
- :Drenewydd yn Notais
- :Dryw
- :Dyffryn Nantlle
- :Ebbw Fach Valley
- :Ebbw Vale Steel Iron and Coal Company
- :Ebbw Valley
- :Edward Bowen (footballer born 1858)
- :Edward Parry (footballer)
- :Edwardsville, Merthyr Tydfil
- :Elegug Stacks
- :Elena Puw Davies
- :Elizabeth Mary Jones
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- :Emergency medical services in Wales
- :Emily Jane Davis
- :Portal:English law
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- :Fan Foel
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- :First Minister Jones
- :Fishguard & Rosslare Railways & Harbours Company
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- :Football hooliganism in Wales
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- :Gaewern quarry
- :Garn Prys
- :Garnedd Fawr
- :Geography and identity in Wales
- :Draft:George Nevett
- :Gigfran quarry
- :Gilfach quarry
- :Glamorgan West Scout Area (The Scout Association)
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- :Glenhafod Park Stadium
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- :Template:Governing bodies of sports in Wales
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- :Graig Ddu
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- :Gruffudd ap Dafydd Goch
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- :Gwendraeth valley
- :Gwent Scout Area (The Scout Association)
- :Gwlad Gwlad
- :Gwyneth Vaughan
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- :Hendre Ddu quarry
- :Hester Lynch Salusbury
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- :Heyope
- :Template:History of Christianity in Wales
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- :Holland Arms
- :Holyhead and Anglesey Mail
- :Horeb, Llanelli
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- :Ifton
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- :International College Wales Swansea
- :Iolo Manuscripts
- :James Humphry Morris
- :Jersey Marine tower
- :John Davies (Independent minister)
- :John Hughes (footballer born 1877)
- :Joseph 'Joe' Davies (footballer, born 1870)
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- :Judith Allison Pearson
- :Kaylea Titford
- :Keith Towler
- :Kingdoms of Wales
- :Lady Parry-Williams
- :Leadership approval opinion polling for the 2021 Senedd election
- :Liberty Stadium (Swansea)
- :Lincolnshire Farmers' Union
- :List of King George V Playing Fields in Pembrokeshire
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- :List of Wales international footballers (alphabetical)
- :List of historic houses in Wales
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- :Llanbobl
- :Llandeilo Primary School
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- :Llandudno Bay
- :Llandudwg
- :Llanelli Rural Council
- :Llanfihangel Rogiet
- :Llangorse Lake Halt railway station
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- :Llyn Hafod y Llyn
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- :Locations in Australia with a Welsh name
- :Lord's Garden, Ruthin
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- :Lucky Man Junction
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- :M4 Toll
- :M4 relief road (Newport)
- :Machynys Peninsula Golf Club
- :Maen Huail Historic Stone
- :Maesycwmmer F.C.
- :Mallwyd railway station
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- :March of Wales
- :Marchia Walliae
- :Margaret Blake
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- :Maria Woodley
- :Mark Parry (musician)
- :Mary Catherine Rhys
- :Maurice Evans (footballer born 1859)
- :Melville Barnett
- :Merseyside and North Wales Electricity Board
- :Metal mining in Wales
- :Mid Glamorgan Scout Area (The Scout Association)
- :Middleton Hall, Carmarthenshire
- :Moel Cae'r-defaid
- :Moel Hafodowen
- :Moel Wnion
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- :Moel y Feidiog
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- :Monmouth Pudding
- :Montgomeryshire Scout Area (The Scout Association)
- :Morfa Glas
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- :Morgan Tud
- :Mr Nice (movie)
- :Museum of Welsh Life
- :Mynydd Bryn-llech
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- :NFU Cymru
- :Nant Cwm Philip Stream
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- :Nantyglo Ironworks
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- :Neath F.C. (formerly BP Llandarcy F.C.)
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- :Template:Newport
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- :Norah Patricia Morris
- :North-East Wales
- :North-east Wales
- :Norton, Swansea
- :Ogw
- :Orddu
- :Pant-y-Sais Fen
- :Pant-y-sais fen
- :Pembrokeshire Scout Area (The Scout Association)
- :Pen-y-fai
- :Pen Pumlumon Fawr
- :Pen y Bwlch Gwyn
- :Penmaen, Swansea
- :Penmaenbach
- :Penycaerau
- :Percy Baker (gymnast)
- :Pitt's Head Halt railway station
- :Plain quarry
- :Pluck Ness Monster
- :Pont Caerhywel
- :Pontyberry
- :Pontypandy
- :Pontypool Leisure Centre
- :Port Talbot Peripheral Distributor Road
- :Porth y Wygyr
- :Porthor
- :Portmadoc (WHR) railway station
- :Portmadoc New (1923) station
- :Portmadoc Old (WHR) railway station
- :Poundffald
- :Prince of Wales (locomotive)
- :Princely standard of Wales
- :Priory Church of St Seiriol
- :Pwdwr quarry
- :Pîl
- :Quarry Bach
- :Quarry Caernarfon
- :Quarry Ffynnon
- :Quarry Forever
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- :Quay House, Conwy
- :RAF Blaenanerch
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- :RAF Hawarden
- :Radnor Scout Area (The Scout Association)
- :Ravenhill, Swansea
- :Recreation Ground, Caersws
- :Regimental Band of the Royal Welsh
- :Rhaeadr Cynfal
- :Rhiwaedog-is-Afon
- :Rhiwaedog-uwch-Afon
- :Rhiwbryfdir
- :Rhobell-y-big
- :Rhobell Ganol
- :Rhodiad-y-brenin
- :Rhona Olive Harris
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- :Richard Payne Davies
- :River Fathew
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- :Draft:Robert Williams (poet)
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- :Sentencing Guidelines Council
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- :Template:Sports venues in Cardiff
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- :Template:Transport in Swansea
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- :University of Wales, Aberystwyth
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Unassessed-Class
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