Changshu's 2021 population is now estimated at 981,654. In 1950, the population of Changshu was 4,696. Changshu has grown by 42,971 since 2015, which represents a 4.58% 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.