Haicheng's 2021 population is now estimated at 795,424. In 1950, the population of Haicheng was 44,600. Haicheng has grown by 11,940 since 2015, which represents a 1.52% 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.