The Gambier Islands are a populated (1319 people), small (30 km2 or 12 sq mi) group of islands, remnants of a caldera along with islets on the surrounding fringing reef, in French Polynesia, located at the southeast terminus of the Tuamotu archipelago. They are generally considered a separate island group from Tuamotu both because their culture and language (Mangarevan) are much more closely related to those of the Marquesas Islands.