Zigong's 2021 population is now estimated at 746,711. In 1950, the population of Zigong was 189,459. Zigong has grown by 9,420 since 2015, which represents a 1.28% 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 Zigong, which typically includes Zigong's population in addition to adjacent suburban areas.