Luisago (Brianzöö: ) is a comune (municipality) in the Province of Como in the Italian region Lombardy, located about northwest of Milan and about southwest of Como. As of 31 December 2004, it had a population of 2,532 and an area of .
Luisago borders the following municipalities: Casnate con Bernate, Cassina Rizzardi, Fino Mornasco, Grandate, Villa Guardia.