Szczecin's 2025 population is now estimated at 396,654. In 1950, the population of Szczecin was 175,840. Szczecin experienced a decrease of -919 residents over the past year, marking an annual decline of -0.23%.These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Szczecin, which typically includes Szczecin's population in addition to adjacent suburban areas.