At the time of the 2006 National Census, the village's population was 1,396 in 321 households, when it was in the Central District.[4] The following census in 2011 counted 1,374 people in 382 households.[5] The 2016 census measured the population of the village as 1,143 people in 344 households. It was the most populous village in its rural district.[2]
In 2023, the rural district was separated from the district in the formation of Zorqabad District.[6]
^Chehel Hesar can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3058270" in the "Unique Feature Id" form, and clicking on "Search Database".