After the 2006 National Census, Kolyai and Pirsalman Rural Districts were separated from the district in the formation of Pirsalman District.[4] The village of Jannatabad was elevated to city status as Paliz in 2020.[5]
At the time of the 2006 census, the district's population was 104,566 in 25,167 households.[6] The following census in 2011 counted 93,789 people in 25,672 households.[7] The 2016 census measured the population of the district as 89,774 inhabitants in 26,928 households.[2]
^ abJahangiri, Ishaq (23 June 2020) [Approved 28 February 1399]. Approval regarding national divisions in Hamadan province. sdil.ac.ir (Report) (in Persian). Ministry of the Interior, Cabinet of Ministers. Proposal 20076; Notification 20449/T56525AH. Archived from the original on 2 June 2023. Retrieved 30 January 2025 – via Shahr Danesh Legal Research Institute.