Changzhou's 2025 population is now estimated at 4,180,040. In 1950, the population of Changzhou was 149,237. Changzhou has grown by 94,540 in the last year, which represents a 2.31% 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.