Mare Gaillard is a commune located in the department of Basse-Terre on the island of Guadeloupe, an overseas territory of France in the Caribbean. It is situated in the northern part of the island and serves as one of its local administrative divisions.
The area is characterized by its tropical geography and is primarily known for its rural landscape and agricultural surroundings. As a constituent part of Guadeloupe, it shares the region's general climate and cultural heritage typical of the Lesser Antilles.