Castellero

Castellero is a comune (municipality) in the Province of Asti in the Italian region Piedmont, located about 30 km southeast of Turin and about 11 km northwest of Asti. As of 31 December 2004, it had a population of 297 and an area of 4.3 km2.

Castellero borders the following municipalities: Baldichieri d'Asti, Monale, and Villafranca d'Asti.