Silvano 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. As of 31 December 2004, it had a population of 1,856 and an area of 12.1 km2. The municipality of Silvano d'Orba contains the frazioni (subdivisions, mainly villages and hamlets) Valle Cochi, Pieve, Bacchetti, Guastarina, Pagliara, Villa, Milanesi, Setteventi, Ravino, Bolla, Pagliaccia, Bordini, Pianterasso, Bessica, Prieto, Castagnola, Caraffa, and Passada. Silvano d'Orba borders the following municipalities: Capriata d'Orba, Castelletto d'Orba, Lerma, Ovada, Rocca Grimalda, and Tagliolo Monferrato.

Demographic evolution