Saint Martin (French: Saint-Martin), officially the Collectivity of Saint Martin (French: Collectivité de Saint-Martin) is an overseas collectivity of France located in the Caribbean. It came into being on 15 July 2007, encompassing the northern 60% of Saint Martin island and neighbouring islets, the largest of which is Île Tintamarre. The southern 40% of the island, Sint Maarten, is one of the four constituent countries that form the Kingdom of the Netherlands. Its capital is Marigot. It has a population of 36,286 (as of Jan. 2011) on 53.2 square kilometres (20.5 sq mi). It is separated from the island of Anguilla by the Anguilla Channel.