Ansan's 2021 population is now estimated at 762,698. In 1950, the population of Ansan was 10,514. Ansan has grown by 1,934 since 2015, which represents a 0.25% 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 Ansan, which typically includes Ansan's population in addition to adjacent suburban areas.