Asso is a comune (municipality) in the province of Como, in the Lombardy region of northern Italy. It is a small town located in the Lombard Prealps area near the southern end of Lake Como.
The comune covers an area of 6.46 square kilometres (2.49 square miles) and has a population of 3,524, giving it a population density of about 546 people per square kilometre. Administratively, it falls within the Province of Como.