Saint Martin is an island in the northeast Caribbean, approximately 300 km (190 mi) east of Puerto Rico. The 87-square-kilometre (34 sq mi) island is divided roughly 60:40 between the French Republic and the Kingdom of the Netherlands, but the Dutch part is more populated than the French part. The division dates to 1648. The northern French part comprises the Collectivity of Saint Martin and is an overseas collectivity of the French Republic. The southern Dutch part comprises Sint Maarten and is one of four constituent countries that form the Kingdom of the Netherlands. Even though the island is an overseas possession of two European Union member states, only the French part of the island is part of the EU.

The Kingdom of the Netherlands, commonly known simply as the Netherlands, is a sovereign state consisting of a collection of constituent territories united under the monarch of the Netherlands, who functions as head of state. The realm is not a federation; it is a unitary monarchy with its largest subdivision, the eponymous Netherlands, predominantly located in Northwestern Europe and with several smaller island territories located in the Caribbean.