The Collectivity of Saint Martin, commonly known as simply Saint Martin, is an overseas collectivity of France in the West Indies in the Caribbean. With a population of 36,286 as of January 2011 on an area of 53.2 square kilometres (20.5 sq mi), it encompasses the northern 60% of the divided island of Saint Martin, and some neighbouring islets, the largest of which is Île Tintamarre. The southern 40% of the island of Saint Martin constitutes Sint Maarten, which has been a constituent country of the Kingdom of the Netherlands since 2010. This marks the only place in the world where France borders the Netherlands.