Khushab is a district in the province of Punjab, Pakistan, with its administrative capital in Jauharabad. The district is named after the historical city of Khushab located within its boundaries. According to the 1998 census, the population was 905,711 with 24.76% living in urban areas. The district consists of three tehsils, Khushab, Noorpur Thal and Quaidabad and a Sub-Tehsil Naushehra. Khushab is home to the Heavy Water and Natural Uranium Research Reactor, part of the Pakistan's Special Weapons Program.