Vanzago is a comune (municipality) in the Province of Milan in the Italian region Lombardy, located about 15 kilometres (9 mi) northwest of Milan. As of 31 December 2004, it had a population of 7,615 and an area of 6.2 square kilometres (2.4 sq mi).
The municipality of Vanzago contains the frazioni (subdivisions, mainly villages and hamlets) Mantegazza, Valdarenne, and Tre Campane.
Vanzago borders the following municipalities: Pogliano Milanese, Pregnana Milanese, Arluno, Sedriano.