Haicheng's 2025 population is now estimated at 848,129. In 1950, the population of Haicheng was 44,600. Haicheng has grown by 13,490 in the last year, which represents a 1.62% 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 Haicheng, which typically includes Haicheng's population in addition to adjacent suburban areas.