Cuvio (Western Lombard: Cüj) is a comune (municipality) in the Province of Varese in the Italian region Lombardy, located about 60 kilometres (37 mi) northwest of Milan and about 12 kilometres (7 mi) northwest of Varese.

Cuvio borders the following municipalities: Azzio, Barasso, Casalzuigno, Castello Cabiaglio, Cocquio-Trevisago, Comerio, Cuveglio, Gavirate, Orino.