Castellinaldo d'Alba is a comune (municipality) in the Province of Cuneo in the Italian region Piedmont, located about southeast of Turin and about northeast of Cuneo. As of 31 December 2004, it had a population of 881 and an area of .
Castellinaldo borders the following municipalities: Canale, Castagnito, Magliano Alfieri, Priocca, and Vezza d'Alba.