Ulyanovsk's 2025 population is now estimated at 622,745. In 1950, the population of Ulyanovsk was 136,118. Ulyanovsk experienced a decrease of -72 residents over the past year, marking an annual decline of -0.01%.These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Ulyanovsk, which typically includes Ulyanovsk's population in addition to adjacent suburban areas.