South Caicos is the seventh largest island in the Turks and Caicos archipelago, with a land area of 21.2 km2 (8 sq mi). South Caicos is known for excellent fishing, both deep sea and bone fishing, and scuba diving. South Caicos was formerly a salt exporter, the island still hosts a network of salt pans as a reminder of the industry. Today, the Island’s main income is derived from small scale commercial fishing.
The School for Field Studies, a global nonprofit, accredited by Boston University, has established a well-regarded Center for Marine Resource Studies in Cockburn Harbour.  The Center's research focuses on marine ecology and natural resource management. The island hosts an Annual South Caicos Regatta, a large celebration that features parties, boat races, and other games. Though there is some real estate development, tourism is currently, virtually, nonexistent on South Caicos.
Together with uninhabited East Caicos and a number of smaller islands, it forms the South Caicos and East Caicos District, with a total area of 136.8 km2 (53 sq mi). All islands in the east and south of Caicos Bank belong to this district, except French Cay, which belongs to Providenciales and West Caicos. The larger ones of these islands are Hog cay (7.9 km²), McCartney Cay (3.5 km²), Little Ambergris Cay (6.6 km²), Big Ambergris Cay (4.3 km²), and Long Cay (immediately south of South Caicos, 1.0 km²). Between South Cacios and the Amgergris Cays are the Six Hill Cays (0.0914 km²)n and the Fish Cays (0.1044 km²). South of the Ambergris Cays are Bush Cay (0.0814 km²), Seal Cays, Pear Cay (0.0138 km²), Shot Cay (0.0004 km²), White Cay (0.0343 km²), South Rock, Whale Breaker, and Swimmer Rock (submerged), and southwest, West Sand Spit (submerged).
Located in Canada.
South Caicos may have been the second island sighted by Columbus. The original inhabitants of the island were Tanio and Lucayan Indians. In addition to a variety of archeological treasures, they left behind the names of the islands in the form of the indigenous “Turk's” head catcus and the Lucayan term “caya hico” meaning string of islands named Caicos. The Lucayans disappeared roughly 30 years after his arrival, leaving the island sparsely populated and the salt industry was booming.
The French and Spanish briefly captured the island in 1706 during which time it became a semi notorious pirate haven.  Until a fungus outbreak killed them off, sea sponge farming briefly flourished on the island during the 1930s. The United States built an anti-submarine base on South Caicos in 1944, along with the first airstrip in the archipelago. During the 1950s a Canadian businessman attempted to start a conch shell export business on the island. In 1959 the U.S. returned to South Caicos when the Coast Guard contrasted a LORAN (low frequency radio signal navigation) station on the island. Today the island attracts tourists drawn to its unspoiled Coral Reefs and real estate developers
The population of South Caicos Island was estimated at 1579 in 2006. 
Villages on South Caicos
- Out North, pop. 706
- The Flat, pop. contained in Out North
- Highlands, pop. 62
Named in 1840 after an official visit by a Governor of the Bahamas – Sir Francis Cockburn – Cockburn Harbour is the largest settlement on South Caicos Island, it’s home to some 900 year round residents. Cockburn Harbour is known for having the best natural harbor in the Turks and Caicos Islands. Until the 1960s it was an important center of regional trade and a major exporter of salt. Today its main industry is small scale fishing focused on conch and spiny lobster exports. A variety of historic structures, including the Queen’s Parade Grounds, an old Wesleyan Church, the 18th century Commissioner's House, the old salt works and the Boiling Hole that fed them can be found in the town.  The abandoned salt pans just outside of town have become the home of a number of bird species including large flocks of flamingos.
- "South Caicos, Turks and Caicos Islands". TCInvest. Retrieved 10-02-2011.
- "Ewing crowned Miss Regatta at South Caicos event". FP Turks and Caicos. 4 June 2010. Retrieved 10-02-2011.