Marie-Galante is not a city, but an island in the Caribbean Sea. It is part of the Guadeloupe overseas region and department of France. The island is located in the Lesser Antilles, southeast of Guadeloupe, and has a population of around 11,000 people. Marie-Galante is known for its beautiful beaches, sugarcane fields, and traditional Caribbean culture. The main town on the island is Grand-Bourg, which serves as the administrative center and has various amenities for visitors.