Isla Grande de Tierra del Fuego (Spanish for 'Great Island of Land of Fire'), also formerly called Isla de Xátiva, is an island near the southern tip of South America from which it is separated by the Strait of Magellan. The western portion (61.43%) of the island (27,294 km (10,538.3 sq mi)) is in Chile (Province of Tierra del Fuego and Antártica Chilena Province), while the eastern portion (38.57%, or 20,698 km (7,991.5 sq mi)) is in Argentina (Tierra del Fuego Province). It forms the major landmass in an extended archipelago (island group) also called Tierra del Fuego.
The island has an area of 47,992 km (18,530 sq mi), making it the largest island in South America and the 29th largest island in the world. Its two biggest towns are Ushuaia and Río Grande, both in Argentina. Other towns are Tolhuin, Porvenir, Camerón, and Cerro Sombrero. The Argentine side, Tierra del Fuego Province, has 190,641 inhabitants (2022), whereas the Chilean side has only 6,656 (2012), almost all located in the Tierra del Fuego Province.