The canton of Montrouge 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 Montrouge.

The canton consists of the following communes:

• Malakoff
• Montrouge

• Canton of Clamart (west)
• Canton of Châtillon (south)
• Canton of Bagneux (south)

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

48°49′00″N 2°19′00″E / 48.8167°N 2.3167°E / 48.8167; 2.3167