Costa Vescovato is a comune (municipality) in the Province of Alessandria in the Italian region Piedmont, located about 100 km southeast of Turin and about 25 km southeast of Alessandria. It borders the municipalities of Avolasca, Carezzano, Castellania Coppi, Cerreto Grue, Montegioco, Paderna, and Villaromagnano.

History

It was one of the territories subject to the temporal dominion of the Bishops of Tortona, hence the name that literally means "bishop's ridge". Subject, like the whole territory, to the expansionist aims of the Duchy of Milan, it was the scene of jurisdictional conflicts between the bishops and the Spanish government first and then the Savoy government. After the Napoleonic period it became definitively a territory of the Kingdom of Sardinia.