Castex
Castex is the name of several French municipalities:
- Castex (Ariège) in the Ariège department
 - Castex (Gers) in the Gers department
 - Castex-d'Armagnac in the Gers department
 
Castex is the family name of the following people:
- Bertrand Pierre Castex (1771–1842), French general of the cavalry
 - Françoise Castex (* 1956), French politician
 - Jean Castex (* 1965), French Prime Minister since July 3, 2020
 - Jean-Claude Castex (* 1941), Canadian historian
 - Jean-Jacques Castex (1731–1822), French sculptor
 - Pierre-Georges Castex (1915–1995), French Romance philologist and literary historian
 - Raoul Castex (1878–1968), French admiral