Foix
View of Chateau de Foix in Lazema area
Administration
Country	France
Region	Midi-Pyrénées
Department	Ariège
Arrondissement	Foix
Canton	Foix
Intercommunality	Pays Foix-Varilhes
Mayor	Norbert Meler (PS) (2014–2020)
Statistics
Elevation	358–933 m (1,175–3,061 ft) (avg. 400 m/1,300 ft)
Land area1	19.32 km2 (7.46 sq mi)
Population2	9,721  (2014)
- Density	503/km2 (1,300/sq mi)
INSEE/Postal code	09122/ 09000
Website	www.mairie-foix.fr
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries.
2Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.

Foix (Occitan: Fois; Catalan: Foix) is a commune, the former capital of the County of Foix. Today it is the préfecture of the Ariège department in southwestern France in the Occitanie region.

It is to south of Toulouse, close to the border with Spain and Andorra. The city is only the second city of the department after Pamiers. Of all French préfectures, Foix is the one with fewest people living in it.