At the time of the 2006 National Census, the village's population was 1,483 in 306 households, when it was in the former Rumeshkan-e Sharqi Rural District of the former Rumeshkan District of Kuhdasht County. The following census in 2011 counted 1,675 people in 422 households. The 2016 census measured the population of the village as 1,757 people in 498 households, by which time the district had been separated from the county in the establishment of Rumeshkan County. The rural district was transferred to the new Central District and renamed Rumeshkan Rural District. Khirdarar was transferred to Bazvand Rural District created in the district. It was the most populous village in its rural district.
^Khirdarar can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "10123324" in the "Unique Feature Id" form, and clicking on "Search Database".
^ Rahimi, Mohammad Reza (26 May 2013). "Divisional reforms in Lorestan province". Laws and Regulations Portal of the Islamic Republic of Iran (in Persian). Ministry of Interior, Council of Ministers. Archived from the original on 28 September 2015. Retrieved 21 November 2023.
