Lierna is a "comune" in the province of Lecco in Lombardy, in north-west Italy. It lies on the eastern shore of Lake Como. It is about north of Milan and about north-west of Lecco. It has an area of 11.3 km² and has twelve "frazioni": Bancola, Casate, Castello, Cisarino, Genico, Giussana, Grumo, La Foppa, Mugiasco, Olcianico, Sornico and Villa. At the end of 2014 the population was 2176 people, in 983 families.