Denizli's 2021 population is now estimated at 660,643. In 1950, the population of Denizli was 21,514. Denizli has grown by 15,861 since 2015, which represents a 2.46% 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 Denizli, which typically includes Denizli's population in addition to adjacent suburban areas.