Irkutsk's 2023 population is now estimated at 645,705. In 1950, the population of Irkutsk was 311,044. Irkutsk has grown by 1,909 in the last year, which represents a 0.3% 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 Irkutsk, which typically includes Irkutsk's population in addition to adjacent suburban areas.