Barnaul's 2021 population is now estimated at 640,396. In 1950, the population of Barnaul was 229,926. Barnaul has grown by 613 since 2015, which represents a 0.10% 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 Barnaul, which typically includes Barnaul's population in addition to adjacent suburban areas.