Viggiù (Italian: [vidˈdʒu]; Varesino: Vigiǘu [ʋiˈdʒyː]) is a comune (municipality) in the Province of Varese in the Italian region Lombardy, located about 50 kilometres (31 mi) northwest of Milan and about 8 kilometres (5 mi) northeast of Varese, on the border with Switzerland.
Viggiù borders the following municipalities: Arcisate, Besano, Bisuschio, Cantello, Clivio, Meride (Switzerland), Saltrio.