At the time of the 2006 National Census, the village's population was 837 in 206 households, when it was in the former Sarchehan District of Bavanat County.[4] The following census in 2011 counted 938 people in 270 households.[5] The 2016 census measured the population of the village as 925 people in 308 households. It was the most populous village in its rural district.[2]
After the census, the district was separated from the county in the establishment of Sarchehan County, and the rural district was transferred to the new Bagh Safa District.[6]
^Kupan can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3072693" in the "Unique Feature Id" form, and clicking on "Search Database".