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Abaco Islands
The Abaco Islands are a 120-mile chain in the northern Bahamas centered on Great Abaco (1,214 km2), known for Caribbean pine forests, loyalist settlement, the ground-nesting Bahama Parrot, and Hurricane Dorian's 2019 Category 5 landfall.
Abu Musa (ابوموسی)
Abu Musa (ابوموسی) is a disputed Persian Gulf island near the Strait of Hormuz, claimed by Iran and Sharjah (UAE). Partitioned by a 1971 memorandum, fully controlled by Iran since 1992; hosts an Iranian garrison and the Mubarak oil field.
Achill Island
Achill Island, County Mayo: Ireland's largest offshore island, joined to the mainland by the 1888 Achill Sound swing bridge. About 3,000 residents, Croaghaun's 668 m cliffs, five Blue Flag beaches, Gaeltacht status, and active coastal research.
Adak Island
Adak Island, largest of the central Aleutian Islands, Alaska (289 sq mi, Mt. Moffett 3,875 ft). WWII Army base from 1942, Cold War Navy anti-submarine base until NAF Adak closed March 31, 1997; now a small Aleut community.
Adam's Bridge
Adam's Bridge, also known as Rama's Bridge or Rama Setu, is a chain of limestone shoals and sandbanks connecting Rameswaram Island in India with Mannar Island in Sri Lanka.
Adelaide Island (landform)
Adelaide Island, an ice-covered island off the west Antarctic Peninsula at about 67°15'S, 68°30'W, was named by John Biscoe in 1832 after Queen Adelaide and hosts the UK's Rothera Research Station.
Admiralty Island
Admiralty Island (Tlingit Kootznoowoo, "fortress of the bears") is a 1,664-square-mile island in Alaska's Tongass National Forest, second largest in the Alexander Archipelago, mostly national monument and wilderness, with about 1,500 brown bears, the world's densest bald eagle nests, and the village of Angoon.
Aegean Islands
Aegean Islands: Greek archipelago in the Aegean Sea between mainland Greece, Asia Minor, and Crete; largest island complex in Europe, including Cyclades and Dodecanese, volcanic arc with Santorini, tourism-driven economy.
Aegina (Αίγινα)
Aegina (Αίγινα), Greek island in the Saronic Gulf near Piraeus, second largest of the Saronic islands, 82.63 km², Mount Oros 532 m; first capital of modern Greece, home of the Temple of Aphaia and PDO pistachio.
Aeolian Islands
Aeolian Islands (Isole Eolie): seven volcanic islands off Sicily, a UNESCO World Heritage Site since 2000 that gave volcanology the Vulcanian and Strombolian eruption types.
Afognak Island
Afognak Island, second largest island of the Kodiak Archipelago, Alaska (700 sq mi, 40 by 25 miles). Alutiiq homeland, 1892 forest reserve, site of Afognak Village destroyed by the 1964 earthquake and tsunami, relocated to Port Lions.
Agaléga
Agaléga: twin coral islands of Mauritius about 1,000 km north of Port Louis, 26 sq km, 330 people, coconut economy, OIDC-administered; site of an India-funded 3 km airstrip and jetty inaugurated in 2024, disputed as a possible Indian military facility.
Ailsa Craig
Ailsa Craig is an uninhabited volcanic microgranite island in the Firth of Clyde, 16 km west of Girvan, Scotland, source of Blue Hone and Common Green curling stone granite, site of an 1886 Stevenson lighthouse, and an RSPB seabird reserve with a major gannet colony.
Air Force Island
Air Force Island: uninhabited island in Qikiqtaaluk Region, Nunavut, Canada, in northeastern Foxe Basin between Baffin Island and Prince Charles Island; area 1,863.34 km², coastline 239.15 km, name official since 1949.
Akimiski Island
Akimiski Island, largest island in James Bay, Nunavut, Canada (Cree 'the land across'); uninhabited 3,001 km² wetland island, Migratory Bird Sanctuary since 1941, disputed Cree Aboriginal title.
Akpatok Island
Akpatok Island: uninhabited Ordovician limestone island, largest in Ungava Bay, Nunavut, Canada (903 km2). Hosts one of the world's largest Thick-billed Murre colonies, over 20% of Canada's population; IBA NU007, no statutory protection.
Akutan Island
Akutan Island (Akutanax̂) is a volcanic island in the eastern Aleutians' Krenitzin group, 35 miles east of Unalaska, home to Akutan Volcano (1,303 m, last eruption 1992), the City of Akutan, and North America's largest seafood plant.
Alaska Peninsula
Alaska Peninsula: mainland extension of southwest Alaska between the Pacific Ocean and Bering Sea, ending in the Aleutian Islands. Aleutian volcanic arc, Aniakchak caldera, Area M salmon fisheries, Katmai brown bears, Unangax̂ and Alutiiq homelands.
Aleutian Islands
Aleutian Islands: volcanic island arc separating the North Pacific from the Bering Sea, homeland of the Unangax̂ (Aleut) people, with 52 volcanoes, great megathrust earthquakes, Russian fur-colonization history, and the World War II Attu and Kiska campaign.
Alexander Archipelago
The Alexander Archipelago is a group of over 1,100 islands along southeastern Alaska's coast, holding 7 of the 10 largest U.S. islands, shaped by fjords, glaciation, the Tongass National Forest, and endemic wildlife.
Alexander Island
Alexander Island (Isla Alejandro I) is Antarctica's largest island, about 400 km long, off the Antarctic Peninsula's west coast, separated by George VI Sound, named for Tsar Alexander I, sighted 1821, with Mount Hall at 3078 m.
Alor Island
Alor Island (Pulau Alor), largest island of Indonesia's Alor Archipelago in East Nusa Tenggara, volcanic inner Banda Arc island of about 2,119 km² with 40,000-year-old Makpan cave occupation, high seismicity, and Kalabahi as main town.
Aloyon Island
Aloyon Island, also associated with the village name Aluyon (Aloyan, Aloyun), is a small low-lying island in Burdeos municipality, Quezon, Calabarzon, Philippines, at 14.88°N 121.98°E, elevation 3 m, near Icol, Cabalao, and San Rafael islands.
Amalfi Coast
The Amalfi Coast (Costiera Amalfitana) is a 40 km cliff-lined shore on the Sorrentine Peninsula, Salerno, Italy; UNESCO World Heritage site since 1997, heart of the medieval Maritime Republic of Amalfi and its terraced lemon groves.
Amami Ōshima
Amami Ōshima (奄美大島) is the largest island (712.4 km²) of the Amami archipelago, Kagoshima Prefecture, Japan, between Kyushu and Okinawa; subtropical, home of the Amami Rabbit, and part of the 2021 UNESCO World Heritage serial site.
Ambrym (island)
Ambrym: volcanic island in Vanuatu's Malampa Province, a basaltic shield volcano with a 12-km caldera and the active Benbow and Marum craters, former lava lakes, ~5 Gg/day SO2, eruptions since 1774.
Amchitka Island
Amchitka Island, a 40-mile Aleutian island in the Rat Island group, hosted three US underground nuclear tests (Long Shot 1965, Milrow 1969, Cannikin 1971, the largest US underground test); assessments found no test-attributable radionuclide leakage.
Amelia Island
Amelia Island, the Isle of Eight Flags, is a barrier island in Nassau County, Florida, the northernmost on Florida's Atlantic coast, claimed by France, Spain, Britain, and the United States.
Amiot Islands
Amiot Islands: islet group with Cumbers Reef and Ward Islands off SW Adelaide Island, Antarctic Peninsula; charted by Charcot's FrAE 1908-10, named for A. Amiot of Montevideo; also Îles Amiot, Islas Amiot, Amiot Reef.
Amlia Island
Amlia Island is an uninhabited island near the east end of the Andreanof group of the Aleutian Islands, Alaska, adjacent to Atka Island, about 72 km long.