Tronzano Lago Maggiore is a comune, or municipality, located in the Province of Varese within the Italian region of Lombardy. It is situated approximately 80 km (50 mi) northwest of Milan and about 30 km (19 mi) north of Varese.
The municipality lies on the border with Switzerland. It is positioned in a geographic area characterized by its proximity to the Province of Varese and the broader Lombardy region.