Pasto's 2021 population is now estimated at 391,202. In 1950, the population of Pasto was 47,220. Pasto has grown by 2,719 since 2015, which represents a 0.70% 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 Pasto, which typically includes Pasto's population in addition to adjacent suburban areas.