ArianshahrArianshahr is a city in and the capital of Sedeh District in Qaen County, South Khorasan province, Iran. It also serves as the administrative center of Sedeh Rural District.DemographicsPopulationAt the time of the 2006 National Census, the city's population was 3,051, residing in 834 households. The following census in 2011 recorded 3,585 people in 1,038 households. The 2016 census recorded a population 3,729 people in 1,090 households.