1819 in Wales

• Lord Lieutenant of Anglesey – Henry Paget, 1st Marquess of Anglesey{{cite book|author=Edward Breese|title=Kalendars of Gwynedd; or, Chronological lists of lords-lieutenant [&c.] ... for the counties of Anglesey, Caernarvon, and Merioneth|year=1873|page=24}}{{cite book | author=J.C. Sainty | author-link=John Sainty (civil servant) | title=List of Lieutenants of Counties of England and Wales 1660-1974 | publisher=Swift Printers (Sales) Ltd | location=London | year=1979}}{{cite book | last = Nicholas | first = Thomas | title = Annals and antiquities of the counties and county families of Wales | publisher = Genealogical Pub. Co | location = Baltimore | year = 1991 | isbn = 9780806313146 | page=695}}{{cite book|title=Cylchgrawn Hanes Cymru|publisher=University of Wales Press|year=1992|page=169}}
• Lord Lieutenant of Brecknockshire and Monmouthshire – Henry Somerset, 6th Duke of Beaufort{{cite book| author=Edwin Poole|title=The Illustrated History and Biography of Brecknockshire from the Earliest Times to the Present Day: Containing the General History, Antiquities, Sepulchral Monuments and Inscriptions|publisher=Edwin Poole|year=1886|page=378}}
• Lord Lieutenant of Caernarvonshire – Thomas Bulkeley, 7th Viscount Bulkeley{{cite book|author=Edward Breese|title=Kalendars of Gwynedd; or, Chronological lists of lords-lieutenant [&c.] ... for the counties of Anglesey, Caernarvon, and Merioneth|year=1873|page=26}}
• Lord Lieutenant of Cardiganshire – William Edward Powell
• Lord Lieutenant of Carmarthenshire – George Rice, 3rd Baron Dynevor
• Lord Lieutenant of Denbighshire – Sir Watkin Williams-Wynn, 5th Baronet
• Lord Lieutenant of Flintshire – Robert Grosvenor, 1st Marquess of Westminster{{cite journal|journal=Old Wales: Monthly Magazine of Antiquities for Wales and the Borders|title=not known|author-link=William Retlaw Williams|publisher="Old Wales" Office|year=1907|volume=3|page=106}}
• Lord Lieutenant of Glamorgan – John Crichton-Stuart, 2nd Marquess of Bute{{cite book | last = Nicholas | first = Thomas | title = Annals and antiquities of the counties and county families of Wales | publisher = Genealogical Pub. Co | location = Baltimore | year = 1991 | isbn = 9780806313146 | page=612}}
• Lord Lieutenant of Merionethshire – Sir Watkin Williams-Wynn, 5th Baronet{{cite book|author=Edward Breese|title=Kalendars of Gwynedd; or, Chronological lists of lords-lieutenant [&c.] ... for the counties of Anglesey, Caernarvon, and Merioneth|year=1873|page=29}}
• Lord Lieutenant of Montgomeryshire – Edward Clive, 1st Earl of Powis{{cite web|author=R. G. Thorne|url=http://www.historyofparliamentonline.org/volume/1790-1820/member/clive-edward-1754-1839|title=Clive, Edward, 2nd Baron Clive (1754-1839), of Walcot, Salop|website=The History of Parliament: the House of Commons 1790-1820|date=1986|access-date=13 November 2021}}
• Lord Lieutenant of Pembrokeshire – Richard Philipps, 1st Baron Milford{{cite DWB|id=s-PHIL-PIC-1491|title=Philipps family, of Picton|author=Bertie George Charles|date=1959|access-date=19 October 2021}}
• Lord Lieutenant of Radnorshire – George Rodney, 3rd Baron Rodney{{cite book|author=Jonathan Williams|title=The History of Radnorshire|publisher=R. Mason|year=1859|page=115}}{{cite book|author=William Stockdale|title=Stockdale's Peerage of the United Kingdom|year=1833|page=86}}

• Bishop of Bangor – Henry Majendie{{cite book | last = Fryde | first = E. B. | title = Handbook of British chronology | publisher = New York Cambridge University Press | location = Cambridge England | year = 1996 | isbn = 9780521563505 | page=292}}{{cite book|author= Thomas Duffus Hardy|title=Fasti Ecclesiae Anglicanae: Or A Calendar of the Principal Ecclesiastical Dignitaries in England and Wales...|publisher= University Press|year=1854|page=305}}
• Bishop of Llandaff – Herbert Marsh (until 28 April);{{cite DNB|wstitle= Marsh, Herbert |volume= 36 |last= Venables |first= Edmund |author-link= Edmund Venables |pages= 211-215 |year= |short=1}} William Van Mildert (from 31 May){{cite ODNB|id=28096|title=Mildert, William|orig-year=2004|year=2007|last=Varley|first=Elizabeth}}
• Bishop of St Asaph – John Luxmoore{{cite book|title=The Church of the people and free church penny magazine|year=1859|page=179}}{{cite book|title=The Apostolical Succession in the Church of England|publisher=James Parkes and Company|year=1866|page=15}}
• Bishop of St Davids – Thomas Burgess{{cite book|author= Thomas Duffus Hardy|title=Fasti Ecclesiae Anglicanae: Or A Calendar of the Principal Ecclesiastical Dignitaries in England and Wales...|publisher= University Press|year=1854|page=307}}{{cite book|title=The Monthly Review Or Literary Journal Enlarged|publisher=Porter|year=1780|page=95}}{{cite book|title=The Later Correspondence of George III, Volume 3|author=George III (King of Great Britain)|publisher=University Press|year=1967|page=434}}{{cite web |title=Records of Past Fellows: Burgess, Thomas |url=https://catalogues.royalsociety.org/CalmView/Record.aspx?src=CalmView.Persons&id=NA3174&pos=1 |website=The Royal Society |access-date=30 October 2020}}

• August – Thomas Telford begins construction of the Menai Suspension Bridge.{{cite book|title=The Civil Engineer and Architect's Journal|url=https://books.google.com/books?id=GLxBAAAAYAAJ&pg=PA269|year=1840|publisher=William Laxton|pages=269}}
• date unknown
• The embankment on Telford's Holyhead Road through the Nant Ffrancon Pass is completed.
• The Welsh colony of Cardigan is established in York County, New Brunswick, Canada.{{cite book|title=Proceedings of the Annual Eastern Snow Conference|url=https://books.google.com/books?id=Cv7wAAAAMAAJ|year=1995|publisher=Eastern Snow Conference|page=184}}
• Robert Bamford Hesketh begins construction of Gwrych Castle.{{cite book|author1=John Davies|author2=Nigel Jenkins|author3=Menna Baines|title=The Welsh Academy encyclopaedia of Wales|url=https://books.google.com/books?id=-ZEUAQAAIAAJ|year=2008|publisher=University of Wales Press|isbn=978-0-7083-1953-6|page=33}}
• Scottish-born London India merchant John Christie purchases a substantial tract of the Great Forest of Brecknock from the Crown.{{cite book|last=Hughes|first=Stephen|year=1990|title=The Brecon Forest Tramroads|publisher=RCAHMW|location=Aberystwyth|isbn=1-871184-05-3}}
• John Scandrett Harford and his brothers acquire the Peterwell estate at Lampeter.{{cite book|author=David Trevor William Price|title=A History of Saint David's University College Lampeter: to 1898|publisher=University of Wales Press|year=1977|isbn=9780708306062|page=17}}

• Major eisteddfodau are held at Carmarthen and Denbigh. The Gorsedd tradition (begun by Iolo Morganwg) becomes formally linked with the eisteddfod at Carmarthen.{{cite book|title=A History of Carmarthenshire|author=John Edward Lloyd|publisher=London Carmarthenshire Society|year=1939|page=128}}

• William Owen Pughe – Coll Gwynfa (translation of Milton's Paradise Lost){{cite book|author1=John Ballinger|author2=James Ifano Jones|title=Catalogue of Printed Literature in the Welsh Department|publisher=Free libraries committee|year=1898|page=325}}

• "From Greenland’s Icy Mountains", a hymn by Reginald Heber, is sung for the first time, at St Giles' Church, Wrexham.

• 3 March – William Ormsby-Gore, 2nd Baron Harlech (died 1904)
• 4 November – Arthur Hill-Trevor, 1st Baron Trevor (died 1894)
• 7 November – Enoch Salisbury, barrister, politician and bibliophile (died 1890){{cite DWB|id=s-SALI-GIB-1819|title=Salisbury, Enoch Robert Gibbon (1819-1890), lawyer and bibliophile|author=Robert Thomas Jenkins|access-date=6 November 2024}}
• 7 December – John Cambrian Rowland, painter (died 1890){{cite book|author1=John Davies|author2=Nigel Jenkins|author3=Menna Baines|title=The Welsh Academy encyclopaedia of Wales|url=https://books.google.com/books?id=-ZEUAQAAIAAJ|year=2008|publisher=University of Wales Press|isbn=978-0-7083-1953-6|page=778}}
• 9 December – John Roose Elias, writer (died 1881){{cite DWB|id=s-ELIA-ROO-1819|title=Elias, John Roose (Y Thesbiad; 1819-1881), poet and prose writer|author=Idwal Lewis|access-date=6 November 2024}}
• unknown date – Arthur Wynn Williams, physician (died 1886){{cite DWB|id=s-WILL-WYN-1819|title=Williams, Arthur Wynn (1819-1886), physician and antiquary|author=Hywel David Emanuel|access-date=6 November 2024}}

• 9 January - William Parry, minister and teacher, 74{{cite DNB|wstitle=Parry, William (1754-1819)|volume=43}}
• 31 January - Thomas Bevan, missionary, about 24{{cite DWB|id=s-BEVA-THO-1796|title=Bevan, Thomas (1796?-1819), missionary in the service of the London Missionary Society|author=Evan Lewis Evans|date=1959|access-date=22 November 2021}}
• 3 February - Mary Bevan, missionary, wife of Thomas Bevan, age unknown
• 6 February - David Davies, clergyman and author, 76{{cite DWB|first=James Frederick|last=Rees|title=Davies, David|id=s-DAVI-DAV-1741|access-date=21 November 2021}}
• 8 February - Sydenham Teak Edwards, botanist, 51{{cite book|author=Thompson Cooper|title=A New Biographical Dictionary: Containing Concise Notices of Eminent Persons of All Ages and Countries: and More Particularly of ... Great Britain and Ireland|url=https://books.google.com/books?id=PfIMAAAAYAAJ&pg=PA524|year=1873|publisher=Bell|pages=524}}
• 25 June
• John Abel, minister, 49{{cite DWB|id=s3-ABEL-JOH-1770|title=Abel, John (1770-1819), Welsh Independent minister|author=Robert Thomas Jenkins|publisher=National Library of Wales|access-date=8 March 2019}}
• Sir John Morris, 1st Baronet, industrialist, 73{{cite DWB|id=s-MORR-ROB-1768|title=Morris, Robert (died 1768), industrialist|author=Robert Thomas Jenkins|year=1959|access-date=22 November 2021}}
• 11 November - Moses Griffiths, artist, 72{{cite DWB|id=s-GRIF-MOS-1747|title=Griffith, Moses (1747-1819), draughtsman and water-colour painter|author=Megan Ellis|access-date=8 March 2019}}

• 1819 in Ireland

{{reflist}}

Wales

Category:1819 in Europe

Category:1810s in Wales