At the 2006 National Census, its population was 5,439 in 962 households, when it was in the former Seydun District of Bagh-e Malek County).[5] The following census in 2011 counted 6,588 people in 1,481 households.[6] The latest census in 2016 showed a population of 7,650 people in 1,803 households.[2]
In February 2023, the district was separated from the county in the establishment of Seydun County, which was divided into two districts of two rural districts each, with Seydun as its capital and only city.[4]
^Seydun can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3083571" in the "Unique Feature Id" form, and clicking on "Search Database".