List of divided islands
Sea islands

List of divided islands

Section Title: Sea islands
Table Section Text: None

Island	Area in km2	Countries (percentage of island's area)

New Guinea	785,753	Indonesia (53.52%) Papua, West Papua Papua New Guinea (46.48%)

Borneo	748,168	Indonesia (73%) Central Kalimantan, East Kalimantan, North Kalimantan, South Kalimantan, West Kalimantan Malaysia (26%) Sabah, Sarawak Brunei (1%)

Ireland	81,638	Ireland (83%) United Kingdom (17%) Administered as Northern Ireland.

Hispaniola	76,192	Dominican Republic (64%) Haiti (36%)

(Isla Grande de) Tierra del Fuego	47,992	Chile (56%) Tierra del Fuego Argentina (44%) Tierra del Fuego

Timor	28,418	Indonesia (53%) East Nusa Tenggara East Timor (47%)

Cyprus	9,234	De jure Republic of Cyprus (97%) United Kingdom (3%) Akrotiri and Dhekelia, Sovereign Base Areas De facto Republic of Cyprus (57%) Turkish Republic of Northern Cyprus (38%) United Kingdom (3%) Akrotiri and Dhekelia, Sovereign Base Areas United Nations buffer zone (2%)

Dall Island	655.2	United States (>99.9%) Canada (<0.1%) The tip of Cape Muzon was established as the "point of commencement" of the international boundary with Alaska in the Anglo-Russian Convention of 1825.

Sebatik Island	452.2	Indonesia, North Kalimantan Malaysia, Sabah

Usedom (Uznam)	445	Germany (79%) Vorpommern-Greifswald Poland (21%) West Pomeranian Voivodeship

Isla Portillos [es]	151.6	Costa Rica Nicaragua On 2 Feb 2018, the ICJ rendered a decision in a border dispute between Nicaragua and Costa Rica regarding Isla Portillos [es], an island formed by the Río San Juan, Rio Taura and Caribbean Sea.

Saint Martin	91.9	France (61%) Saint-Martin, an overseas collectivity Kingdom of the Netherlands (39%) Sint Maarten, a constituent country

Kataja (including Inakari)	0.71	Finland Sweden

Passport Island, an artificial island approximately in the middle of the King Fahd Causeway	0.66	Saudi Arabia Bahrain

Märket	0.03	Finland (50%) Åland Islands Sweden (50%) Uppsala County and Stockholm County

Koiluoto	0.03	Finland (>50%) Russia (<50%)

K Island, or Nova Zemlia (Нова Земля), a barrier island formed at the mouth of the Danube River in 1988	0.56	Ukraine (>50%) Romania (<50%)

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