Qaen County (Persian: شهرستان قائن)[a] is in South Khorasan province, Iran.
[4] At the time of the 2006 census, the county's population was 137,357 in 35,783 households.
[6] The 2016 census measured the population of the county as 116,181 in 34,794 households.
[2] Qaen County's population history and administrative structure over three consecutive censuses are shown in the following table.
Media related to Qaen County at Wikimedia Commons