Hengyang's 2021 population is now estimated at 1,573,731. In 1950, the population of Hengyang was 97,440. Hengyang has grown by 46,624 since 2015, which represents a 3.05% 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 Hengyang, which typically includes Hengyang's population in addition to adjacent suburban areas.