Nightingale Island is an island in the South Atlantic Ocean, 3 km² in area, part of the Tristan da Cunha group of islands. They are administered by the United Kingdom as part of the overseas territory of Saint Helena, Ascension and Tristan da Cunha. Nightingale Island is part of the Nightingale Islands, which also includes islets Middle Island and Stoltenhoff Island. All three are uninhabited, but are regularly visited for scientific purposes and research.