Arignac (French pronunciation: [aʁiɲak]; Occitan: Arnhac) is a commune in the Ariège department in the Occitanie region of south-western France.

Access to the commune is by road D88 from Tarascon-sur-Ariège in the south passing through the village and continuing north-east to join National Highway N20 at Exit 14.

The town covers about 10% of the commune with the rest mostly forest and hill country with a few farms in the south.

[3] The Ariège river forms the south-eastern border of the commune and the Saurat flows south through the commune and the town to join the Ariège.

[3] [3] List of successive mayors[4] The inhabitants of the commune are known as Arignacois or Arignacoises in French.