Jianyang's 2021 population is now estimated at 500,925. In 1950, the population of Jianyang was 3,132. Jianyang has grown by 13,792 since 2015, which represents a 2.83% 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 Jianyang, which typically includes Jianyang's population in addition to adjacent suburban areas.