Lohéac (; ; Gallo: Lozeiac) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France. The town is well known for cars and motorsport, hosting a rallycross track part of the FIA World Rallycross Championship, a tarmac racing circuit, a karting circuit, a quad bike circuit and the Manor of the Automobile, which hosts the Museum of the Automobile.
Inhabitants of Lohéac are called Lohéaciens in French.