Castex (surname)
Castex is a Gascon surname meaning "castle". Notable people with the surname include:
- Alphonse Castex, French Olympic athlete
- Françoise Castex, French Socialist MP
- Jean Castex, French politician, Prime Minister of France from 2020 to 2022
- Jean-Jacques Castex, French sculptor
- Louis Castex, French sculptor
- Louis Castex, French aviation pioneer
- Michel Castex, French journalist
- Pierre Castex, French scriptwriter
- Pierre-Georges Castex, literary critic
- Raoul Castex, French Navy Vice Admiral, theorist of naval warfare