French Polynesia, officially the Collectivity of French Polynesia, is an overseas collectivity of the French Republic and its sole overseas country. It is composed of 118 geographically dispersed islands and atolls stretching over an expanse of more than 2,000 kilometres (1,200 mi) in the South Pacific Ocean. Its total land area is 4,167 square kilometres (1,609 sq mi). French Polynesia is divided into five groups of islands: the Society Islands archipelago, composed of the Windward Islands and the Leeward Islands; the Tuamotu Archipelago; the Gambier Islands; the Marquesas Islands; and the Austral Islands. Tahiti, which is located within the Society Islands, is the most populous island, having close to 69% of the population of French Polynesia as of 2017. Papeete, located on Tahiti, is the capital.