Yongkang's 2021 population is now estimated at 543,073. In 1950, the population of Yongkang was 3,126. Yongkang has grown by 17,004 since 2015, which represents a 3.23% 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 Yongkang, which typically includes Yongkang's population in addition to adjacent suburban areas.