Mud DistrictMud District is in Sarbisheh County, South Khorasan province, Iran. Its capital is the city of Mud.DemographicsPopulationAt the time of the 2006 National Census, the district's population was 11,803 in 3,517 households. The following census in 2011 counted 12,080 people in 3,864 households. The 2016 census measured the population of the district as 12,037 inhabitants in 3,945 households.