Wonsan's 2026 population is now estimated at 368,948. In 1950, the population of Wonsan was 176,000. Wonsan has grown by 2,940 in the last year, which represents a 0.8% annual change. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Wonsan, which typically includes Wonsan's population in addition to adjacent suburban areas.