Kadkan DistrictKadkan District is in Torbat-e Heydarieh County, Razavi Khorasan province, Iran. Its capital is the city of Kadkan.DemographicsPopulationAt the time of the 2006 National Census, the district's population was 11,855 in 2,941 households. The following census in 2011 counted 12,031 people in 3,483 households. The 2016 census measured the population of the district as 12,805 inhabitants in 3,932 households.