Les Cayes, often referred to as Aux Cayes (Haitian Creole: Nan cays yo) is an arrondissement in the Sud department of Haiti.

As of 2015, the population was 346,276 inhabitants.

[1] Postal codes in the Les Cayes Arrondissement start with the number 81.

The arrondissement consists of the following municipalities:

This article about a location in Haiti is a stub.