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Salsette Island (साष्टी)
Salsette Island (साष्टी, Shashti, "sixty-six villages") is the large island north of Bombay on which Mumbai and part of Thane district stand; Kanheri's 109 Buddhist caves, Portuguese and Maratha rule, British annexation 1782.
Samar
Samar: third-largest island of the Philippines (1,355,935 ha) in Eastern Visayas, divided into Samar, Eastern Samar, and Northern Samar provinces; home to Samar Island Natural Park, karst forests, and Rafflesia manillana.
Sammisoq
Sammisoq, also spelled Sangmissoq and known as Christian IV Island, is the largest island of the Cape Farewell Archipelago in southern Greenland. It is uninhabited and rises to 306 meters.
Samoa Islands
Samoa Islands: volcanic archipelago in the central South Pacific, split between independent Samoa and the US territory of American Samoa; Samoa Islands marine ecoregion of Central Polynesia, fringing coral reefs, ocean management under the Samoa Ocean Strategy.
Samoan Islands
The Samoan Islands, also called the Samoan archipelago, are a 485-km volcanic chain in Polynesia split at 171°W by the 1899 Tripartite Convention into independent Samoa and the U.S. territory of American Samoa.
Samos (Σάμος)
Samos (Σάμος), Greek island in the eastern Aegean nearest Turkey; home of ancient Samos city (Pythagoreion), the Heraion of Hera, and Eupalinos' tunnel; UNESCO site since 1992; struck by Mw 7.0 quake in 2020.
San Andrés (island)
San Andrés, Colombian coral island in the western Caribbean, largest island of the San Andrés, Providencia y Santa Catalina department; free port since 1953, Raizal Creole-speaking people, Seaflower Biosphere Reserve, over 1.1 million tourists in 2025.
San Clemente Island
San Clemente Island: southernmost of California's Channel Islands, about 64 miles west of San Diego, Navy-owned since 1934 and its primary Pacific Fleet SEAL training area, with 17 endemic protected plants and a 2023 five-species delisting.
San Cristóbal Island (3651946)
San Cristóbal Island (Isla San Cristóbal), easternmost of Ecuador's Galápagos, 557 km², capital Puerto Baquerizo Moreno, Darwin's 1835 landing site, El Junco fresh-water lake, Kicker Rock, second largest population.
San Francisco Peninsula
The San Francisco Peninsula, known locally as the Peninsula, separates San Francisco Bay from the Pacific Ocean, extending from the Santa Clara Valley to the Golden Gate.
San Juan Islands
The San Juan Islands are an archipelago of about 473 islands in Washington's Salish Sea, home to Coast Salish peoples for millennia, site of the 1859 Pig War, and settled by U.S. arbitration in 1872.
San Nicolas Island
San Nicolas Island (Tongva: Haraasnga) is the most remote of California's eight Channel Islands, Navy-owned and closed to the public. Home of the Nicoleño people and the Lone Woman who inspired Island of the Blue Dolphins.
San Salvador Island
San Salvador Island (Guanahani), Bahamas: traditionally Columbus's 1492 first landfall, formerly Watling Island until 1926; noted for blue holes, inland lakes, national parks, and the Gerace Research Centre.
Sand flat
Sand flat: an unvegetated intertidal tidal flat of sand, exposed at low tide, where wave and tidal energy winnow fine silt; found at estuary entrances and inlets, with Bathyporeia-dominated fauna and wave-energy dissipating function.
Sandy Hook
Sandy Hook is a 10-km barrier spit in Monmouth County, New Jersey, a unit of Gateway National Recreation Area. Home of the 1764 Sandy Hook Lighthouse, the oldest surviving in the United States, and Fort Hancock, it is distinct from Sandy Hook, Connecticut.
Sandy Island, New Caledonia
Sandy Island (Sable Island) was a phantom island charted in the Coral Sea northwest of New Caledonia from an 1876 whaling ship sighting until Australian scientists undiscovered it in 2012, finding 1,300-meter-deep ocean.
Sangihe Islands
Sangihe Islands (Kepulauan Sangihe), an Indonesian island chain and regency in North Sulawesi between Sulawesi and Mindanao: 105 islands, capital Tahuna, the 500 km Sangihe volcanic arc colliding with Halmahera, and deadly Awu volcano.
Santa Catalina Island (California)
Santa Catalina Island (Pimu), southernmost-lying California Channel Island, 21 miles long with Avalon as its only city. Known for 60+ endemic species, the Wrigley-era Casino, and the Catalina Island Conservancy managing 88% of the island.
Santa Cruz Island (island, Ecuador)
Santa Cruz Island (Isla Santa Cruz, English name Indefatigable) is the second largest Galápagos island, Ecuador, at the archipelago's center; home to Puerto Ayora, the Charles Darwin Research Station, about 12,000 people, and the main tourism hub.
Santa Cruz Islands
Santa Cruz Islands: island group in southernmost Solomon Islands (Temotu Province), main island Nendö; Mendaña's failed 1595 Graciosa Bay settlement, Lapita-era settlement, red-feather currency trade, British protectorate from 1898.
Santa Isabel Island
Santa Isabel Island (Santa Ysabel, Isabel Island) is the longest island of Solomon Islands, in Isabel Province, named by Mendaña in 1568; capital Buala, Mount Kubonitu, Bugotu, Cheke Holo, and Zabana languages, nickel mining and logging.
Santorini
Santorini (Thera, Σαντορίνη), southernmost Cycladic island in the South Aegean, Greece: an active volcanic caldera shaped by the Minoan eruption around 1600 BC, home to Akrotiri and Ancient Thera, hit by the 2025 earthquake swarm, and a leading case study in overtourism and water scarcity.
São Miguel Island
São Miguel Island (Ilha de São Miguel), largest and most populous island of the Azores, Portugal: 745.8 km², Pico da Vara 1,105 m, 138,557 residents (2025), six volcanic zones including Sete Cidades, Agua de Pau, and Furnas, capital Ponta Delgada.
São Tomé Island
São Tomé Island (Ilha de São Tomé), volcanic Gulf of Guinea island of São Tomé and Príncipe on the Cameroon Volcanic Line; 857 km², Pico de São Tomé 2,024 m, last eruptions about 36,000 years ago, cocoa agroforestry.
Sauvie Island
Sauvie Island, historically Wapato Island, is the largest island in the Columbia River at its confluence with the Willamette near Portland, Oregon; once home to four Chinookan villages, depopulated by the 1830s malaria epidemic, later an HBC dairy managed by Laurent Sauvé.
Savaiʻi
Savaiʻi is Samoa's largest and westernmost island, a 75-km-long basaltic shield volcano rising to 1,858 m, with 45,175 residents (2021 census, 22% of Samoa) and historic eruptions including Matavanu 1905–1911.
Scandinavian Peninsula
The Scandinavian Peninsula is Europe's largest peninsula, made up mostly of mainland Norway and Sweden. Sweden occupies the larger eastern part, and the Scandinavian mountain range forms its spine.
Scarborough Shoal
Scarborough Shoal (Huangyan Dao; Panatag Shoal; Bajo de Masinloc) is the South China Sea's largest atoll, ~150 km², inside the Philippine EEZ, claimed by China, the Philippines, and Taiwan, seized by China in 2012, and the subject of the 2016 arbitral ruling and 2023-2026 enforcement escalations.
Sea Island, Georgia
Sea Island, Georgia: private resort barrier island in Glynn County, linked by causeway to St. Simons Island. Developed by Howard Coffin from 1926 around The Cloister; 2,000 acres, Forbes Five-Star hotels, G8 2004 site.
Sea Islands
Sea Islands: chain of tidal and barrier islands on the South Carolina, Georgia, and northern Florida Atlantic coast, home of rice, indigo, and Sea Island cotton plantations and the Gullah Geechee people.