The canton of Montauban-de-Bretagne is an administrative division of the Ille-et-Vilaine department, in northwestern France.

At the French canton reorganisation which came into effect in March 2015, it was expanded from 8 to 24 communes (4 of which were merged into the new communes La Chapelle-du-Lou-du-Lac and Montauban-de-Bretagne).

Its seat is in Montauban-de-Bretagne.

[3] It consists of the following communes:[3]