Comerio is a comune (Municipality) in the Province of Varese in the Italian region Lombardy, located about 50 km northwest of Milan and about 8 km west of Varese. As of 31 December 2004, it had a population of 2,549 and an area of 5.6 km². The Municipality of Comerio contains the frazioni (subdivisions, mainly villages and hamlets) Muro, Orocco, Picco, Mattello, Cugnolo, and Vigne. Comerio borders the following municipalities: Barasso, Castello Cabiaglio, Cuvio, Gavirate.

Demographic evolution