Montemezzo (Comasco: ) is a comune (municipality) in the Province of Como in the Italian region Lombardy, located about north of Milan and about northeast of Como. As of 31 December 2004, it had a population of 270 and an area of 9.1 km<sup>2</sup>.
Montemezzo borders the following municipalities: Gera Lario, Samolaco, Sorico, Trezzone, Vercana.