Île-à-Vache, is a Caribbean island, one of Haiti's satellite islands. It lies in the Baie de Cayes about 6.5 miles (10.5 km) off the coast of the country's southwest peninsula, roughly between the town of Les Cayes and Pointe l'Abacou. It was formerly known by the name of Abacca. Administratively, it became a commune in 1976 as part of the Les Cayes Arrondissement in the Sud department.

Les Cayes, often referred to as Aux Cayes, is a commune and seaport in the Les Cayes Arrondissement, in the Sud department of Haiti, with a population of 71,236. Due to its isolation from the political turmoil of the capital, Port-au-Prince, it is one of Haiti's major ports, with export trade concentrating on mostly coffee and sugarcane. As the world's largest supplier of vetiver, it exports 250 tons annually of this ingredient of perfume and fragrance manufacturing. Minor exports include bananas and timber.