The Central District of Damghan County (Persian: بخش مرکزی شهرستان دامغان‎) is a district (bakhsh) in Damghan County, Semnan Province, Iran. At the 2006 census, its population was 72,967, in 20,303 families.[1] The District has three cities: Damghan, Dibaj, and Kalateh Rudbar. The District has three rural districts (dehestan): Damankuh Rural District, Howmeh Rural District, and Rudbar Rural District.