Le Tiercent (French pronunciation: [lə tjɛʁsɑ̃]; Gallo: Le Tierczant, Breton: An Tergant) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.

Le Tiercent is located 37 km (23 mi) northeast of Rennes and 35 km (22 mi) south of Mont Saint-Michel.

The neighboring communes are Chauvigné, Saint-Marc-le-Blanc, Baillé, Saint-Hilaire-des-Landes, Saint-Ouen-des-Alleux, and Saint-Christophe-de-Valains.

Inhabitants of Le Tiercent are called Tiercentois in French.

This Ille-et-Vilaine geographical article is a stub.