Saint Helena () is a British overseas territory located in the South Atlantic Ocean. It is a remote volcanic tropical island 1,950 kilometres (1,210 miles) west of the coast of south-western Africa, and 4,000 kilometres (2,500 mi) east of Rio de Janeiro in South America. It is one of three constituent parts of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha.Saint Helena measures about 16 by 8 kilometres (10 by 5 mi) and has a population of 4,439 per the 2021 census. It was named after Helena, mother of Constantine I. It is one of the most remote islands in the world and was uninhabited when discovered by the Portuguese enroute to the Indian subcontinent in 1502. For about four centuries the island was an important stopover for ships from Europe to Asia and back, while sailing around the African continent, until the opening of the Suez canal. St Helena is the United Kingdom's second-oldest overseas territory after Bermuda.

Saint Helena is known for being the site of Napoleon's second exile, following his final defeat in 1815. View less