Martinique is a French administrated island, between the Caribbean Sea and the North Atlantic Ocean.
Martinique is both an overseas région and a département* of France. French is the official language but 96% of the people speak Martiniquese Creole.
*France is administratively divided into 23 régions (like US counties) made up of 1 or more départements (like US townships). There are 100 French départements. 96 are in France and 4 are overseas.