Sirone (Brianzöö: ) is a comune (municipality) in the Province of Lecco in the Italian region Lombardy, located about northeast of Milan and about southwest of Lecco. As of 31 December 2004, it had a population of 2,270 and an area of .
The municipality of Sirone contains the frazione of San Benedetto.
Sirone borders the following municipalities: Barzago, Dolzago, Garbagnate Monastero, Molteno, Oggiono.