Islands Divided by International Borders

 Island, location

Shared by

Area

sq. miles or acres

sq km or hectares

1. New Guinea

Papua New Guinea - Indonesia

309,000

800,000

2. Borneo, Southeast Asia

Indonesia - Malaysia - Brunei

280,100

725,500

3. Ireland

Ireland - United Kingdom

32,589

84,406

4. Hispaniola, Caribbean

Dominican Republic - Haiti

28,840

74,700

5. Grande de Tierra del Fuego

Argentina - Chile

18,530

47,992

6. Timor

Indonesia - East Timor

11,883

30,777

7. Cyprus

Cyprus - Northern Cyprus - UK (Note 1)

3,572

9,251

8. Corocoro

Venezuela - Guyana

c. 270

c. 690

9. Sebatik, east coast of Borneo

Indonesia - Malaysia

175

452

10. Usedom / Uznam, Baltic Sea

Germany - Poland

172

445

11. Saint Martin / Sint Maarten, Caribbean

Guadeloupe - Netherlands Antilles

34

88

12. island under King Fahd Causeway

Bahrain - Saudi Arabia

163 acres

66 ha

13. Province I., L. Memphremagog, Quebec - Vermont

Canada - United States

70 acres

28 ha

14. island in Purnujarvi, 61o15'N, 29o10'E

Finland - Russia

c. 40 acres

c. 15 ha

15. Hisön

Sweden - Norway

21 acres

8 ha

16. Storoya, Utgardsjoen, 60o01'N, 12o25'E

Norway - Sweden

9 acres

4 ha

17. east island in Boundary L., North Dakota - Manitoba

United States - Canada

8 acres

3.3 ha

18. Märket / Märketin, Baltic Sea

Finland - Sweden

8 acres

3.3 ha

18. west island in Boundary Lake, North Dakota - Manitoba

United States - Canada

3 acres

1.1 ha

19. Kulleholmen, Södra Boksjön

Norway - Sweden

2 acres

0.8 ha

20. Tagholm, Södra Boksjön

Norway - Sweden

0.7 acres

0.3 ha

21. middle island, Södra Boksjön

Norway - Sweden

0.2 acres

0.1 ha

  

Note 1: Northern Cyprus is a Turkish-supported de facto state in the north part of the island. It is not recognized by the international community. Cyprus also hosts two British bases that are under the sovereignty of the U.K. rather than Cyprus.

Special case:

Cuba: The Cuban government does not administer the whole island of Cuba. The United States retains control over the Guantanamo Bay base, at the southeastern end of the island.  The border of the base also cuts across Flamingo Cay, leaving about 60% of the small island under American control.

Former:

Vozrozhdeniya, an island in the Aral Sea between Uzbekistan and Kazakhstan, had been the 8th largest divided island, at about 900 sq miles / 2,300, but the shrinking of the sea caused it to join to the mainland between June 2000 and June 2001.

It is likely that there are small islands on the U.S.-Canadian border and in Scandinavia that have been omitted from this list.

Thanks to Jesper Nielsen for help in compiling this information.

Return to main World Island Info menu

Last modified 5/3/02--------------------------- Copyright 2006 Joshua Calder

Contact Joshua Calder at jcalder@erols.com with questions or suggestions. 

island geography / world geography / divided islands