1,338 articles
Isle of Sheppey
Isle of Sheppey (Sceapige, Sheep Island): Kent island in the Thames estuary separated by the Swale, with Sheerness, Minster, Queenborough, Leysdown; eroding London Clay cliffs, 1909 Short brothers aviation, Sheppey Crossing (2006).
Isle of Skye
Isle of Skye (An t-Eilean Sgitheanach), largest Inner Hebrides island, 1,656 km2, ~13,000 residents, over 650,000 visitors a year; linked by the 1996 Skye Bridge, known for the Cuillin and overtourism pressures.
Isle of Wight
Isle of Wight: island and unitary authority off southern England, separated from the mainland by the Solent; 146.8 sq miles, about 140,000 people; designated a UNESCO Biosphere Reserve on 19 June 2019, the seventh in the UK.
Isle Royale
Isle Royale is a roadless archipelago in northwestern Lake Superior that forms Isle Royale National Park in Keweenaw County, Michigan, home to a wolf-moose study running since 1958.
Isles of Scilly
The Isles of Scilly are a granite archipelago of over 150 islands about 28 miles southwest of Land's End, Cornwall, with five inhabited islands, dense prehistoric archaeology, a 1975 AONB, and a sui generis island council.
Islet
Islet: a very small island, bigger than a rock and smaller than an island, formed by volcanic, fluvial, or reef-sediment processes; also the islets of Langerhans, the insulin-secreting pancreatic cell clusters central to diabetes.
Islita Casilda
Islita Casilda is a small island in Chile's Región de Magallanes y de la Antártica Chilena at 53°02'S, 73°57'W, elevation 52 m; GeoNames ID 3896290, Wikidata Q23650898, near Punta Kings and Península Blanca.
Isthmus
Isthmus: a narrow strip of land connecting two larger landmasses and separating two bodies of water, exemplified by the Isthmuses of Panama and Suez, canal sites, and the ~2.8 Ma Panama land bridge.
Isthmus of Panama
Isthmus of Panama: land bridge joining North and South America and separating Atlantic from Pacific. Formed by volcanic arc collision; closure date debated (2.8 Ma vs 13–15 Ma); drove the Great American Biotic Interchange.
Isthmus of Tehuantepec
Isthmus of Tehuantepec, Mexico's narrowest land bridge between the Gulf of Mexico and Pacific, roughly 200 km across Oaxaca and Veracruz; site of Chivela Pass, Tehuano winds, the 1894 Tehuantepec Railway, and the modern CIIT interoceanic corridor.
Istria
Istria (Istra) is the largest Adriatic peninsula, 3,476 km², shared by Croatia (90%), Slovenia, and Italy; historically Roman, Venetian, Habsburg, and Italian territory, now mostly Croatia's Istrian County.
Iturup
Iturup (Etorofu, 択捉島), the largest Kuril island, is a volcanic island controlled by Russia and claimed by Japan as one of the four Northern Territories, seized by the USSR in 1945; Putin made his first visit there in August 2026.
Iwo Jima (硫黄島)
Iwo Jima (硫黄島, Iōtō, "sulfur island") is a small volcanic island in Japan's Volcano Islands, the site of the fierce Battle of Iwo Jima in 1945.
Izu Islands
Izu Islands (伊豆諸島): nine volcanic islands south of Tokyo Bay, part of Tokyo Metropolis along with the Ogasawara Islands. About 21,500 residents; active volcanoes on the Izu-Bonin arc, including Izu-Oshima and Miyakejima.
Jagged Island (island)
Jagged Island is a small rocky island 2.5 miles NNW of Round Point, King George Island, South Shetland Islands, Antarctica, charted by Discovery Investigations in 1935; Argentina calls it Isla Gregores.
James Ross Island (landform)
James Ross Island is a large, partly ice-covered island off the northeastern Antarctic Peninsula, named for explorer James Clark Ross. It hosts a Cretaceous sedimentary basin beneath the Neogene James Ross Island Volcanic Group, rich fossil deposits including a titanosaur, and retreating glaciers.
Jameson Land
Jameson Land, a peninsula in eastern Greenland north of Scoresby Sound, hosts the Jameson Land Basin, an undrilled ~10,000 km2 sedimentary basin explored by ARCO (1984–1990) and now licensed to White Flame Energy/80 Mile with Greenland Energy planning first drilling.
Jan Mayen
Jan Mayen: Norwegian Arctic volcanic island at 71°N, 377 km², dominated by Beerenberg (2,277 m), the world's northernmost active subaerial volcano and Norway's only active volcano; nature reserve since 2010.
Jarvis Island
Jarvis Island, also called Bunker's Island, an uninhabited U.S. Line Island just south of the equator; a 1974 National Wildlife Refuge in the Pacific Islands Heritage Marine National Monument, once a guano mine, closed to the public.
Jason Peninsula
Jason Peninsula is a peninsula on the Oscar II Coast of Graham Land, Antarctica, named in 1893 by Captain Carl Anton Larsen after his ship Jason.
Java
Java (Jawa), Indonesia's main island, is the world's most populous island: about 137 million people on roughly 128,000 km², a volcanic arc with fertile soils, dense agriculture, sinking coasts, and the capital Jakarta.
Jazīrat Būbiyān
Jazīrat Būbiyān (جزيرة بوبيان), Bubiyan or Boubyan Island, Kuwait's largest island, a flat uninhabited deltaic sabkha island in the northwest Arabian Gulf, Ramsar-protected in the north and site of the Mubarak Al Kabeer Port project.
Jazīrat Maşīrah
Jazīrat Maşīrah (جزيرة مصيرة), Masirah Island, is Oman's largest island in the Arabian Sea, known for its globally important loggerhead turtle rookery, four nesting sea turtle species, Neolithic archaeology, and kitesurfing winds.
Jazīreh-ye Sheykh Andarābī
Jazireh-ye Sheykh Andarabi (جزیره شیخ اندرابی), a small uninhabited island in the Khuran straits, Hormozgan, Iran, near Laft on Qeshm; low mangrove-covered island with the Sheikh Andarabi shrine, part of Qeshm Geopark.
Jeju Island (제주도)
Jeju Island, or Jejudo, is a volcanic island off the southern coast of South Korea whose Hallasan, at 1,950 meters, is the country's highest mountain.
Jekyll Island
Jekyll Island is a 5,700-acre Georgia barrier island and State Park in Glynn County, formerly the exclusive Jekyll Island Club, purchased by the state in 1947 and managed by the Jekyll Island Authority.
Jenny Lind Island
Jenny Lind Island (Qikiqtaryuaq), Nunavut island in Queen Maud Gulf about 20 km off Victoria Island, named by explorer John Rae for the Swedish soprano Jenny Lind; a declining Lesser Snow Goose and Ross's Goose breeding colony and Important Bird Area.
Jens Munk Island
Jens Munk Island names two Arctic islands honoring explorer Jens Munk: Kapuiviit (ᑲᐳᐃᕖᑦ), a 920 km² uninhabited island in Foxe Basin, Nunavut, Canada, and Jens Munks Ø, a 471 km² island in Sermersooq, Greenland.
Jens Munk Ø
Jens Munk Ø (Jens Munk Island, Jens Munks Ø) is an uninhabited 493 km² island in the Søren Norby Islands, Sermersooq, eastern Greenland, named for explorer Jens Munk; distinct from the Nunavut island of the same name.
Joerg Peninsula
Joerg Peninsula: rugged mountainous peninsula, about 20 by 8 miles, between Trail and Solberg Inlets on the east coast of the Antarctic Peninsula; first charted by the USAS in 1940, named in 1952 for W. L. G. Joerg.