1,338 articles
Ammassalik Ø
Ammassalik Ø (Ammassalik Island, formerly Angmagssalik Island) is a large island on southeast Greenland's coast, site of Tasiilaq, East Greenland's largest town; named for capelin (ammassat), with uplifted-margin relief and Little Ice Age glacial history.
Amund Ringnes Island
Amund Ringnes Island is an uninhabited island in Nunavut, Canada, covering 5,255 km² in the Canadian Arctic Archipelago, discovered in 1901 during Otto Sverdrup's second Fram expedition.
Andaman and Nicobar Islands (अंडमान और निकोबार द्वीपसमूह)
Andaman and Nicobar Islands (अंडमान और निकोबार द्वीपसमूह), also called A&N Islands or ANI, an Indian union territory of 8,249 km² in the Bay of Bengal: 836 islands in two groups split by the Ten Degree Channel, capital Sri Vijaya Puram, penal-settlement and Japanese-occupation history, and five vulnerable tribal groups.
Andersson Island
Andersson Island, also called Andersson Isla and formerly Uruguay Island, is an Antarctic island about 9 miles long near the south entrance to Antarctic Sound, renamed for Swedish geologist J. Gunnar Andersson of Nordenskjöld's 1901-04 expedition.
Andros
Andros is the largest island of the Bahamas (about 5,959 km²), an archipelago of North Andros, Mangrove Cay, and South Andros with under 10,000 people, the country's largest freshwater aquifer, over 180 blue holes, and the world's third largest barrier reef.
Anegada
Anegada, also called the flat coral and limestone island of the British Virgin Islands, is the territory's second largest island at 38 km2, lying 24 km north of Virgin Gorda behind Horseshoe Reef, with Ramsar wetlands and the Critically Endangered Anegada rock iguana.
Anna Maria Island
Anna Maria Island is a 7-mile Florida Gulf barrier island in Manatee County with three cities, no high-rises, a free trolley, Bean Point, and beaches hit by Helene, Milton, and red tide.
Annette Island
Annette Island (Tàakw.àani) is an island in the Alexander Archipelago, southeastern Alaska, south of Ketchikan. Home to Metlakatla and the Annette Islands Reserve, the only federal Indian reservation in Alaska, reserved for the Tsimshian by Congress in 1891.
Anticosti Island
Île d'Anticosti is a forested limestone island at the entrance to the Gulf of St. Lawrence in Quebec, Canada, and the largest island in Quebec.
Antigua
Antigua: largest island of Antigua and Barbuda in the eastern Caribbean, 280 sq km, volcanic-to-limestone geology, Ciboney settlement from 3100 BC, British sugar colony, Nelson's Dockyard UNESCO site, tourism economy, hurricane and sea-level-rise exposure.
Antilles
The Antilles are the Caribbean island chains forming the West Indies with the Bahamas: the Greater Antilles (Cuba, Jamaica, Hispaniola, Puerto Rico), continental fragments, and the volcanic Lesser Antilles arc.
Antillia
Antillia (Antilia), the Island of the Seven Cities, was a phantom island of the Atlantic drawn on portolan charts from 1424 to about 1587, tied to the seven bishops legend, sought by Columbus, and source of the name Antilles.
Anvers Island (landform)
Anvers Island, largest island of the Palmer Archipelago off the Antarctic Peninsula, named for Antwerp in 1898; gazetteers classify it as an island, with adjacent undersea features Anvers-Hugo Trough, Palmer Basin, and Palmer Deep.
Aoba
Aoba, also known as Ambae, is a volcanic island in Penama Province, Vanuatu, rising to 1,496 m, with eruptions that evacuated its 11,000 residents in 2017 and 2018.
Aoshima, Ehime
Aoshima (青島) is a 0.49 km² island of Ozu City, Ehime, Japan, in the Seto Inland Sea, famous as a cat island where feral cats outnumbered residents; about 80 cats and four people remained by 2024.
Ara Sima
Ara Sima (Ara Shima, Ostrov Rogachëva, 荒島) is a small uninhabited islet 350 m off the southeast coast of Kunashir, Kuril Islands, Russia; a 56 m high grassy rock hosting a rhinoceros auklet colony of 17,000–30,000 pairs.
Arabian Peninsula (شبه الجزيرة العربية)
The Arabian Peninsula (شبه الجزيرة العربية, Jazīrat al-ʿArab) is southwestern Asia's arid peninsula with Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, the UAE, and Yemen; defined by Red Sea rifting, oil-bearing sedimentary basins, extreme water scarcity, and accelerating warming.
Aran Islands
The Aran Islands (Oileáin Árann) are three limestone Gaeltacht islands at the mouth of Galway Bay, Ireland: Inis Mór, Inis Meáin, Inis Oírr. Population 1,347 (2022), famous for Dún Aonghasa, St Enda's monastery, and the Aran sweater.
Archipel d'Hochelaga
Archipel d'Hochelaga (Hochelaga Archipelago) is the group of over 320 islands at the confluence of the St. Lawrence and Ottawa rivers in Quebec, including Montreal Island, Laval, and Perrot; name coined by Marie-Victorin in 1935, officialized in 1985.
Archipelago
Archipelago: a group or chain of islands in an ocean, lake, or river; from Italian arcipelago, originally the Aegean Sea. Forms volcanically, glacially, or tectonically; UNCLOS defines archipelagic States with baselines at 1:1 to 9:1 water-to-land.
Arctowski Peninsula
Arctowski Peninsula (Półwysep Arctowskiego), a small rocky peninsula on the Danco Coast of the northwestern Antarctic Peninsula between Andvord Bay and Wilhelmina Bay, about 30 km long, discovered in 1898 by the Belgian Antarctic Expedition and named for Henryk Arctowski.
Ardley Island
Ardley Island: ice-free island off southwest King George Island, South Shetland Islands, Antarctica; ASPA 150, formerly SSSI 33, with large gentoo penguin colony and CCAMLR monitoring site.
Arguin
Arguin (Arguim) is an island off the coast of Mauritania, site of the first Portuguese trading post on the West African coast, established around 1445.
Aristazabal Island
Aristazabal Island: large forested uninhabited island off the central north coast of British Columbia, Canada, southwest of Princess Royal Island in Hecate Strait; named 1792 by Caamaño for Spanish admiral Gabriel de Aristazábal; Crown land with Laredo limestone deposit.
Arnøya
Arnøya (Sami Árdni) is Norway's 15th-largest island, in Skjervøy, Troms: 275.65 km², 260 inhabitants, highest peak Arnøyhøgda 1,170 m. Distinct from the Arnøyene pair in Gildeskål and an Arnøya in Smøla.
Artificial island
Artificial island: a human-built island made by filling lakes or seas with rock, sand, or debris. Also called crannogs (ancient) or reclaimed islands. Ranges from Neolithic Scottish lake dwellings to modern megaprojects in Singapore, Hong Kong, Denmark, and the South China Sea.
Arveprinsen Ejland
Arveprinsen Ejland (Arveprinsens Ejland) is the older Danish name for Alluttoq, a 655 km2 uninhabited island in Disko Bay, West Greenland, with Archaean greenstone geology and a 1784 whaling station, Klokkerhuk.
Assateague Island
Assateague Island, a 37-mile Maryland-Virginia barrier island, is protected as Assateague Island National Seashore (1965) and Chincoteague National Wildlife Refuge, known for wild horses, the Chincoteague pony swim, and rapidly shifting, storm-reshaped coastal landforms.
Astrolabe Island
Astrolabe Island, an Antarctic island in Bransfield Strait off Trinity Peninsula (63°18'S, 58°40'W), named by d'Urville's 1837-40 expedition after the ship Astrolabe; about 3 miles long, rising to 560 m, with chinstrap penguin colonies.
Atherton Islands
Atherton Islands: two small islands off Bell Point, King George Island, South Shetland Islands, Antarctica. Charted by the Discovery Investigations 1934-35 and named after cartographer Noel Atherton; UK name approved 8 September 1953.