| class="wikitable sortable" |
| Name | Number of islands
! Country |
|---|
| Archipelago Sea (Åland Archipelago) | Over 50,000[{{Cite web |title=Archipelago |url=https://education.nationalgeographic.org/resource/archipelago/ |access-date=2025-04-14 |website=education.nationalgeographic.org |language=en}}]
| Finland |
| Canadian Arctic Archipelago | 36,563[{{Cite web |title=Arctic Archipelago |url=https://www.thecanadianencyclopedia.ca/en/article/arctic-archipelago |access-date=2025-04-14 |website=www.thecanadianencyclopedia.ca |language=en}}]
| Canada |
| Stockholm Archipelago
|30,000[{{Cite web |date=2025-04-14 |title=A guide to Stockholm, Sweden's water-framed archipelago capital |url=https://www.nationalgeographic.com/travel/article/guide-to-stockholm-sweden-capital |access-date=2025-04-14 |website=Travel |language=en}}]
| Sweden |
| Thirty Thousand Islands | Around 30,000[{{Cite web |title=Island |url=https://www.thecanadianencyclopedia.ca/en/article/island#:~:text=is%20very%20large.-,It%20is%20estimated%20that%20there%20are%20some%2030%20000%20islands,and%20129%20groups%20or%20archipelagoes. |access-date=2025-04-14 |website=www.thecanadianencyclopedia.ca |language=en}}]
| Canada |
| Malay Archipelago
|Around 25,000
| Brunei, Indonesia, Malaysia, Papua New Guinea, Philippines and Timor-Leste |
| Lake of the Woods Islands | 14,632[{{cite web|url=https://www.thecanadianencyclopedia.ca/en/article/lake-of-the-woods|website=The Canadian Encyclopedia|title=Lake of the Woods|access-date=May 18, 2021}}]
| Canada and United States |
| Indonesian Archipelago
|13,558[{{Cite journal |last=Andréfouët |first=Serge |last2=Paul |first2=Mégane |last3=Farhan |first3=A. Riza |date=2022-01-01 |title=Indonesia’s 13558 islands: A new census from space and a first step towards a One Map for Small Islands Policy |url=https://www.sciencedirect.com/science/article/abs/pii/S0308597X21004590#:~:text=Indonesia%20is%20the%20largest%20country,the%20number%20at%2017,508%20islands. |journal=Marine Policy |volume=135 |pages=104848 |doi=10.1016/j.marpol.2021.104848 |issn=0308-597X}}]
|Indonesia |
| Småland archipelago
|12,740{{Citation needed|date=April 2025}}
|Sweden |
| Öregrund archipelago | 9,722[{{cite web |title=Swedish islands |url=http://www.scb.se/statistik/MI/MI0812/2008A01/MI0812_2008A01_SM_MI50SM0901.pdf |url-status=usurped |archive-url=https://web.archive.org/web/20120319205635/http://www.scb.se/statistik/MI/MI0812/2008A01/MI0812_2008A01_SM_MI50SM0901.pdf |archive-date=19 March 2012 |accessdate=18 March 2011 |publisher=SCB, The Swedish Statistics Agency}}]
|Sweden |
| Östergötland archipelago | 8,888| Sweden |
| | Philippine Archipelago | 7,500[{{cite news|last1=Mayuga|first1=Jonathan|title=Namria 'discovers' 400 previously 'unknown' PHL islands using IfSAR|url=http://www.businessmirror.com.ph/namria-discovers-400-previously-unknown-phl-islands-using-ifsar/|accessdate=12 February 2016|newspaper=BusinessMirror|date=10 February 2016}}]
|Philippines |
| Japanese archipelago
|6,852[{{cite web |title=Facts and Figures of Japan 2007 01: Land |url=http://fpcj.jp/old/e/mres/publication/ff/pdf_07/01_land.pdf |url-status=dead |archiveurl=https://web.archive.org/web/20090731072744/http://fpcj.jp/old/e/mres/publication/ff/pdf_07/01_land.pdf |archivedate=2009-07-31 |accessdate=2010-08-20 |publisher=Foreign Press Center Japan}}]
|Japan |
| Kvarken Archipelago | 5,600[{{Cite web |last=Centre |first=UNESCO World Heritage |title=High Coast / Kvarken Archipelago |url=https://whc.unesco.org/en/list/898/ |access-date=2025-04-14 |website=UNESCO World Heritage Centre |language=en}}]
| Finland |
| Södermanland archipelago | 5,371| Sweden |
| British Isles | 4,400[{{Cite web |title=How many islands are there in the British Isles? {{!}} Notes and Queries {{!}} guardian.co.uk |url=https://www.theguardian.com/notesandqueries/query/0,5753,-1934,00.html |access-date=2025-04-14 |website=www.theguardian.com}}]
| Ireland and United Kingdom |
| Blekinge archipelago
|2,875{{Citation needed|date=April 2025}}
|Sweden |
| Alexander Archipelago
|Over 2,000[{{Cite journal |last=Cook |first=Joseph A. |last2=Dawson |first2=Natalie G. |last3=MacDonald |first3=Stephen O. |date=2006-11-01 |title=Conservation of highly fragmented systems: The north temperate Alexander Archipelago |url=https://www.sciencedirect.com/science/article/abs/pii/S0006320706002278 |journal=Biological Conservation |volume=133 |issue=1 |pages=1–15 |doi=10.1016/j.biocon.2006.05.026 |issn=0006-3207|url-access=subscription }}]
|United States |
| Thousand Islands
|1,864[{{Cite web |title=History of the 1000 Islands |url=https://fly1000islands.ca/history-of-the-1000-islands/ |access-date=2025-04-14 |website=1000 Islands Helicopter Tours {{!}} Experience the Thousand Islands by Air |language=en-US}}]
|Canada and United States |
| Ha Long Bay
|Over 1,600[{{Cite web |date=2022-05-07 |title=The Emerald Isles of Hạ Long Bay |url=https://earthobservatory.nasa.gov/images/149803/the-emerald-isles-of-ha-long-bay |access-date=2025-04-14 |website=earthobservatory.nasa.gov |language=en}}]
|Vietnam |
| Zhoushan archipelago
|1,390[{{Cite web |title=How many islands are there in Zhoushan? |url=http://zhoushan.chinadaily.com.cn/2021-08/11/c_650140.htm |access-date=2025-04-14 |website=zhoushan.chinadaily.com.cn}}]
|China |
| Great Barrier Reef
|Over 900[{{Cite web |last=Centre |first=UNESCO World Heritage |title=Great Barrier Reef |url=https://whc.unesco.org/en/list/154/ |access-date=2025-04-14 |website=UNESCO World Heritage Centre |language=en}}]
|Australia |
| Lucayan Archipelago | 740[{{Cite web |title=The Lucayan Archipelago: Island Tapestry in the Western Atlantic {{!}} LAC Geo |url=https://lacgeo.com/lucayan-archipelago#:~:text=The%20Lucayan%20Archipelago%20consists%20of,and%20the%20Little%20Bahama%20Bank. |access-date=2025-04-14 |website=lacgeo.com}}]
|The Bahamas and Turks and Caicos Islands (United Kingdom) |
| Seto Inland Sea | Over 700[{{Cite web |title=This is Japan: The Seto Inland Sea / The Government of Japan - JapanGov - |url=https://www.japan.go.jp/tomodachi/2018/spring2018/the_seto_inland_sea.html |access-date=2025-04-14 |website=The Government of Japan - JapanGov - |language=en}}]
|Japan |
| Dalmatia | 1,244–1246[{{cite news |date=8 June 2010 |title=Kartografi protiv Turističke zajednice - Imamo 1246 otoka, tko je izgubio dva, ne znamo |url=http://www.jutarnji.hr/imamo-1246-otoka--tko-je-izgubio-dva--ne-znamo/821991 |url-status=dead |archive-url=https://web.archive.org/web/20100611072441/http://www.jutarnji.hr/imamo-1246-otoka--tko-je-izgubio-dva--ne-znamo/821991 |archive-date=11 June 2010 |access-date=30 August 2016 |newspaper=Jutarnji list |language=hr}}]
| Croatia |
| Maldive Islands | 1,190[{{Cite web |last=Mission |first=Maldives |title=Home |url=http://www.maldivesmission.com/geography |access-date=2025-04-14 |website=Permanent Mission of the Republic of Malidves to the UN |language=en}}]
| Maldives |
| West Estonian archipelago | Almost 900[[http://entsyklopeedia.ee/artikkel/lääne-eesti_saarestik3 Lääne-Eesti saarestik] - Eesti Entsüklopeedia]
| Estonia |
| Mergui Archipelago
|Around 800[{{Cite web |last=Centre |first=UNESCO World Heritage |title=Myeik Archipelago |url=https://whc.unesco.org/en/tentativelists/5874/ |access-date=2025-04-14 |website=UNESCO World Heritage Centre |language=en}}]
|Myanmar |
| Falkland Islands | 780[{{cite web
]|title=The Islands: Location
|work=Falkland Islands Government web site
|url=http://www.falklands.gov.fk/location.php
|year=2007
|accessdate=8 April 2007
|url-status=dead
|archiveurl=https://web.archive.org/web/20070428023347/http://www.falklands.gov.fk/location.php
|archivedate=28 April 2007
}}
|Falkland Islands (United Kingdom) |
| New Zealand archipelago | Over 600[{{Cite web |last=Taonga |first=New Zealand Ministry for Culture and Heritage Te Manatu |title=Nearshore islands |url=https://teara.govt.nz/en/nearshore-islands |access-date=2025-04-14 |website=teara.govt.nz |language=en}}]
| New Zealand |
| Recherche Archipelago | Around 105[{{Cite web |title=Commonwealth marine environment surrounding the Recherche Archipelago |url=https://www.environment.gov.au/sprat-public/action/kef/view/69;jsessionid=C696E761A8CE5B4930D8475FFB7AF58E |access-date=13 March 2025 |website=Australian Government – Department of Climate Change, Energy, the Environment and Water}}]
| Australia |