Cislago ( ) is a (municipality) in the Province of Varese in the Italian region of Lombardy, located about northwest of Milan and about southeast of Varese. As of 31 December 2004, it had a population of 9,118 and an area of .
The municipality of Cislago contains the (subdivisions, mainly villages and hamlets) Massina, Santa Maria, and Cascina Visconta.
Cislago borders the municipalities of Gerenzano, Gorla Minore, Limido Comasco, Mozzate, Rescaldina, Turate.