Martinique is an island in the Lesser Antilles of the West Indies, in the eastern Caribbean Sea. A part of the French West Indies (Antilles), Martinique is an overseas department and region and a single territorial collectivity of the French Republic. It is a part of the European Union as an outermost region within the special territories of members of the European Economic Area, and an associate member of the CARICOM, but is not part of the Schengen Area or the European Union Customs Union. The currency in use is the euro.