Les Cayes (Kréyòl: Okay; English: The Cays) is a town in southwest Haiti near the river Ravine du Sud, on the Caribbean coast. It is the capital of the Sud Département.
Les Cayes is at about 196 km southwest of the Haitian capital Port-au-Prince. It is also the chief town of an arrondissement (a part of a department) with the same name. The arrondissement has six communes (a commune is like a municipality): Les Cayes, Camp-Perrin, Chantal, Île à Vache, Maniche and Torbeck.