Daverio is a comune (municipality) in the Province of Varese in the Italian region Lombardy, located about 45 kilometres (28 mi) northwest of Milan and about 6 kilometres (4 mi) southwest of Varese. As of 31 December 2004, it had a population of 2,751 and an area of 4.0 square kilometres (1.5 sq mi).

Daverio borders the following municipalities: Azzate, Bodio Lomnago, Casale Litta, Crosio della Valle, Galliate Lombardo.