Azzio is a town and comune in the province of Varese, within the Lombardy region of northern Italy. It is one of the many small municipalities that make up the province of Varese, an area in the north of Lombardy near the Italian-Swiss border.
As a comune, Azzio is a basic administrative unit of local government, a status it shares with thousands of other such entities across Italy. The province of Varese in which it lies is part of Lombardy, Italy's most populous region, situated in the country's north.