Mornico al Serio (Bergamasque: ) is a comune (municipality) in the Province of Bergamo in the Italian region of Lombardy, located about northeast of Milan and about southeast of Bergamo. As of 31 December 2004, it had a population of 2,632 and an area of .
Mornico al Serio borders the following municipalities: Calcinate, Ghisalba, Martinengo, Palosco.