Changzhou's 2021 population is now estimated at 3,749,712. In 1950, the population of Changzhou was 149,237. Changzhou has grown by 124,384 since 2015, which represents a 3.43% 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 Changzhou, which typically includes Changzhou's population in addition to adjacent suburban areas.