Nizhny Tagil's 2025 population is now estimated at 343,700. In 1950, the population of Nizhny Tagil was 310,697. Nizhny Tagil experienced a decrease of -557 residents over the past year, marking an annual decline of -0.16%.These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Nizhny Tagil, which typically includes Nizhny Tagil's population in addition to adjacent suburban areas.