Internationally Divided Islands

Given the name of the countries which have territory on the islands, guess all the islands which are in part owned by more than one country.
Including coastal islands only
Quiz by
Chad
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Last updated: January 23, 2026
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First submittedJune 17, 2022
Times taken84
Average score42.1%
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Country
Island
Brunei
Borneo
Indonesia
Malaysia
Guyana
Corocoro
Venezuela
Cyprus
Cyprus
United Kingdom
Canada
Hans Island
Denmark
Dominican Republic
Hispaniola
Haiti
Finland
Jähi
Russia
Ireland
Ireland
United Kingdom
Argentina
Isla Grande de
Tierra del Fuego
Chile
Finland
Kataja
Sweden
Romania
K Island
Ukraine
Finland
Koiluoto
Russia
Finland
Märket
Sweden
Argentina
Martín García
Uruguay
Indonesia
New Guinea
Papua New Guinea
France
Saint Martin
Netherlands
Indonesia
Sebatik Island
Malaysia
East Timor
Timor
Indonesia
Germany
Usedom
Poland
Finland
Vanhasaari
Russia
Finland
Unnamed Island
Russia
Russia
Unnamed Island
Ukraine
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3 Comments
+2
Level 65
Sep 1, 2023
Only Jetpunk recognized countries were included, sorry Northern Cyprus.

Martín García island has been included despite its lack of inclusion on the source Wikipedia article. This is because the article lists the Río de La Plata estuary as inland water, various other sources (and common sense) claim otherwise.

Dall Island (Canada/United States) was excluded since Canada does not exhibit any actual control over any parts of the island.

+1
Level 65
Jan 23, 2026
Using the Jetpunk standard definition of the Russo-Ukrainian border the two countries share an unnamed island in the Syvash Sea. Since the 2022 Russian invasion of Ukraine this island has been de facto solely Russian.
+1
Level 65
Jan 23, 2026
Updated to include Corocoro Island, shared by Guyana and Venezuela.