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.