Zaoyang's 2021 population is now estimated at 576,057. In 1950, the population of Zaoyang was 21,335. Zaoyang has grown by 13,678 since 2015, which represents a 2.43% 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 Zaoyang, which typically includes Zaoyang's population in addition to adjacent suburban areas.