Haining's 2021 population is now estimated at 542,380. In 1950, the population of Haining was 64,035. Haining has grown by 14,725 since 2015, which represents a 2.79% 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 Haining, which typically includes Haining's population in addition to adjacent suburban areas.