Saint Martin (; ) is an island in the northeast Caribbean, approximately east of Puerto Rico. The island is divided roughly 60/40 between France  and the Kingdom of the Netherlands ; the two parts are roughly equal in population though, with slightly more people living on the Dutch side. It is the smallest inhabited island divided between two nations. The division dates to 1648. The southern Dutch part comprises Sint Maarten and is one of four constituent countries that form the Kingdom of the Netherlands. The northern French part comprises the Collectivité de Saint-Martin (Collectivity of St. Martin) and is an overseas collectivity of France.