Sareyn County (Persian: شهرستان سرعین) is in Ardabil province, Iran.

[3] After the 2016 National Census, the village of Irdemousa was elevated to the status of a city.

[4] At the time of the 2011 census, the county's population was 18,231 people in 5,214 households.

[2] Sareyn County's population history and administrative structure over two consecutive censuses are shown in the following table.

Media related to Sareyn County at Wikimedia Commons