Haining's 2025 population is now estimated at 595,717. In 1950, the population of Haining was 64,035. Haining has grown by 12,142 in the last year, which represents a 2.08% 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.