Mariupol's 2025 population is now estimated at 425,923. In 1950, the population of Mariupol was 191,219. Mariupol experienced a decrease of -2,843 residents over the past year, marking an annual decline of -0.66%.These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Mariupol, which typically includes Mariupol's population in addition to adjacent suburban areas.