Limoux is a commune and subprefecture in the Aude department, a part of the ancient Languedoc province and the present-day Occitainie region in southern France. It lies on the river Aude about 30 km (19 mi) due south of Carcassonne.

The town is perhaps best known for its Winter festival called Fecas, often referred to as a Carnival or Fête. It is generally referred to as Carnaval de Limoux in French language.