Invorio is a comune (municipality) in the Province of Novara in the Italian region of Piedmont, located about 100 kilometres (62 mi) northeast of Turin and about 35 kilometres (22 mi) northwest of Novara. Invorio borders the following municipalities: Ameno, Arona, Bolzano Novarese, Borgomanero, Briga Novarese, Colazza, Gattico-Veruno, Gozzano, Meina, and Paruzzaro.