Lenna (Bergamasque: ) is a comune (municipality) in the Province of Bergamo in the Italian region of Lombardy, located about northeast of Milan and about north of Bergamo. As of 31 December 2004, it had a population of 676 and an area of .
The municipality of Lenna contains the frazione (subdivision) Scalvino.
Lenna borders the following municipalities: Camerata Cornello, Dossena, Moio de' Calvi, Piazza Brembana, Roncobello, San Giovanni Bianco, Valnegra.