At the time of the 2006 National Census, the village's population was 1,643 in 506 households, when it was in Kahak Rural District of the former Nofel Loshato District of Qom County.[5] The following census in 2011 counted 1,408 people in 464 households.[6] The 2016 census measured the population of the village as 3,082 people in 1,001 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 Kahak County. The rural district was transferred to the new Central District, and Kermejegan was transferred to Kermejegan Rural District created in the district.[4]
^Kermejegan can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3069885" in the "Unique Feature Id" form, and clicking on "Search Database".