Tristan da Cunha (pronunciation: /ˈtrɪstən də ˈkuːnjə/), colloquially Tristan, is the name of both a remote group of volcanic islands in the south Atlantic Ocean and the main island of that group. It is the most remote inhabited archipelago in the world, lying 2,000 kilometres (1,200 mi) from the nearest inhabited land, Saint Helena, and 2,400 kilometres (1,500 mi) from the nearest continental land, South Africa. It is 3,360 kilometres (2,090 mi) from South America. The territory consists of the main island, named Tristan da Cunha, which has a north–south length of 11.27 kilometres (7.00 mi) and an area of 98 square kilometres (38 sq mi), along with the smaller, uninhabited Nightingale Islands and the wildlife reserves of Inaccessible and Gough islands. As of January 2017, the main island has 262 permanent inhabitants. Meanwhile, the other islands are uninhabited, except for the personnel of a weather station on Gough Island.

Tristan da Cunha is part of the British overseas territory of Saint Helena, Ascension and Tristan da Cunha. This includes Saint Helena and equatorial Ascension Island, some 3,730 kilometres (2,318 mi) to the north of Tristan.

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