Ust-Kamenogorsk's 2023 population is now estimated at 329,352. In 1950, the population of Ust-Kamenogorsk was 63,646. Ust-Kamenogorsk has grown by 1,020 in the last year, which represents a 0.31% 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 Ust-Kamenogorsk, which typically includes Ust-Kamenogorsk's population in addition to adjacent suburban areas.