Mariupol's 2026 population is now estimated at 423,423. In 1950, the population of Mariupol was 191,219. Mariupol experienced a decrease of -2,500 residents over the past year, marking an annual decline of -0.59%. 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.