The canton of Montoire-sur-le-Loir is an administrative division of the Loir-et-Cher department, central France. Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Montoire-sur-le-Loir.

It consists of the following communes:

Ambloy Artins Authon Coulommiers-la-Tour Crucheray Les Essarts Faye Gombergean Les Hayes Houssay Huisseau-en-Beauce Lancé Lavardin Lunay Marcilly-en-Beauce Montoire-sur-le-Loir Montrouveau Naveil Nourray Périgny Pray Prunay-Cassereau Rocé Les Roches-l'Évêque Saint-Amand-Longpré Saint-Arnoult Saint-Gourgon Saint-Jacques-des-Guérets Saint-Martin-des-Bois Saint-Rimay Sasnières Selommes Ternay Thoré-la-Rochette Tourailles Troo Vallée-de-Ronsard Villavard Villechauve Villedieu-le-Château Villemardy Villeporcher Villerable Villeromain Villetrun Villiersfaux

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