Yakutsk's 2025 population is now estimated at 343,581. In 1950, the population of Yakutsk was 55,172. Yakutsk has grown by 1,803 in the last year, which represents a 0.53% 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 Yakutsk, which typically includes Yakutsk's population in addition to adjacent suburban areas.