Castelletto d'Orba

Castelletto d'Orba is a comune (municipality) in the Province of Alessandria in the Italian region Piedmont, located about 90 km southeast of Turin and about 25 km south of Alessandria.

Castelletto d'Orba borders the following municipalities: Capriata d'Orba, Lerma, Montaldeo, San Cristoforo, and Silvano d'Orba.