Cerreto Grue is a comune (municipality) in the Province of Alessandria in the Italian region Piedmont, located about east of Turin and about southeast of Alessandria. As of 31 December 2004, it had a population of 346 and an area of .
Cerreto Grue borders the following municipalities: Costa Vescovato, Montegioco, Sarezzano, and Villaromagnano.