The canton of Montval-sur-Loir (before 2021: Château-du-Loir)[1] is an administrative division of the Sarthe department, northwestern France.
Its borders were modified at the French canton reorganisation which came into effect in March 2015.
Its seat is in Montval-sur-Loir.
[2] It consists of the following communes:[2]
This Sarthe geographical article is a stub.