Cordes-sur-Ciel (Occitan: Còrdas) is a commune in the Tarn department in southern France.

The fortified town was built in 1222 by Raimon VII, the Count of Toulouse, who, though not a Cathar himself, tolerated the heresy. The village is now a popular tourist spot. Until recently the town's name was Cordes, a word thought to come from the Indo-European root "corte" meaning "rocky heights."