Odesa's 2025 population is now estimated at 1,006,700. In 1950, the population of Odesa was 532,477. Odesa experienced a decrease of -900 residents over the past year, marking an annual decline of -0.09%.These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Odesa, which typically includes Odesa's population in addition to adjacent suburban areas.