| Coustaussa | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Coustaussa (Aude).svg |
| Arrondissement: | Limoux |
| Canton: | La Haute-Vallée de l'Aude |
| Insee: | 11109 |
| Postal Code: | 11190 |
| Mayor: | Didier Tricoire[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Limouxin |
| Coordinates: | 42.9417°N 2.2789°W |
| Elevation M: | 318 |
| Elevation Min M: | 235 |
| Elevation Max M: | 548 |
| Area Km2: | 4.47 |
Coustaussa (in French pronounced as /kustosa/; Occitan (post 1500);: Costauçan) is a commune in the Aude department in Occitanie region in southern France. Its inhabitants are called Coustaussans.
The village is situated in the high valley of the Aude, on the river Sals between Arques and Couiza.
In the twelfth century, the lordship of Coustaussa belonged to the Vilar family. In the fourteenth century, it was in the hands of the de Fenouillet family. In 1367, by the marriage of Geraude de Fenouillet to Saix de Montesquieu, the lordship passed to the Montesquieus who kept it until the French Revolution.[2]
During the night of 31 October to 1 November 1897, the parish priest of Coustaussa, the Abbé Antoine Gélis, was brutally murdered in his presbytery. The crime was not solved. The Abbé was found during the investigation to possess large sums of money which had not been taken by his assailants.[3]
Since March 2001, the Mayor of the commune has been Robert Sanchez.
Coustaussa has a ruined castle.