The canton of Châtillon is a French administrative division, located in the arrondissement of Antony, in the Hauts-de-Seine département (Île-de-France région). Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Châtillon.

The canton consists of the following communes:

• Châtillon
• Fontenay-aux-Roses

• Canton of Montrouge (north)
• Canton of Bagneux (east)
• Canton of Clamart (west)
• Canton of Châtenay-Malabry (south)

• Cantons of the Hauts-de-Seine department
• Communes of the Hauts-de-Seine department

48°48′00″N 2°17′00″E / 48.8000°N 2.2833°E / 48.8000; 2.2833