Kayseri's 2025 population is now estimated at 1,037,250. In 1950, the population of Kayseri was 65,289. Kayseri has grown by 11,740 in the last year, which represents a 1.14% 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 Kayseri, which typically includes Kayseri's population in addition to adjacent suburban areas.