Oviglio ( or ) is a (municipality) in the Province of Alessandria in the Italian region of Piedmont, located about southeast of Turin and about southwest of Alessandria. As of 31 December 2004, it had a population of 1,248 and an area of .
Oviglio borders the following municipalities: Alessandria, Bergamasco, Borgoratto Alessandrino, Carentino, Castellazzo Bormida, Felizzano, Incisa Scapaccino, Masio, and Solero.