Changshu's 2025 population is now estimated at 1,123,540. In 1950, the population of Changshu was 4,696. Changshu has grown by 29,850 in the last year, which represents a 2.73% 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 Changshu, which typically includes Changshu's population in addition to adjacent suburban areas.