Lecco's 2021 population is now estimated at 309,119. In 1950, the population of Lecco was 186,006. Lecco has grown by 1,449 since 2015, which represents a 0.47% annual change. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Lecco, which typically includes Lecco's population in addition to adjacent suburban areas.