Oncino is a comune (municipality) in the Province of Cuneo in the Italian region Piedmont, located about 60 km southwest of Turin and about 45 km northwest of Cuneo. As of 31 December 2004, it had a population of 93 and an area of 48.6 km2. The municipality of Oncino contains the frazioni (subdivisions, mainly villages and hamlets) Villa, Ruata, Ruera, Serre, Saret, Sant'Ilario, Arlongo, Paschie', Tirolo, Bigorie, Chiotti, and Porcili. Oncino borders the following municipalities: Casteldelfino, Crissolo, Ostana, Paesana, Pontechianale, and Sampeyre.

Demographic evolution