At the time of the 2006 National Census, the village's population was 979 in 263 households, when it was in Buin Zahra County. The following census in 2011 counted 1,205 people in 345 households. The 2016 census measured the population of the village as 1,080 people in 339 households, by which time the district had been separated from the county in the establishment of Avaj County. It was the most populous village in its rural district.
^Kolanjin can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3071812" in the "Unique Feature Id" form, and clicking on "Search Database".
^Rahimi, Mohammad Reza (c. 2021) [Approved 14 October 1390]. Creation of Avaj County in the center of Avaj city in Qazvin province. qavanin.ir (Report) (in Persian). Ministry of the Interior, Council of Ministers. Proposal 62642/42/1/4/1. Archived from the original on 13 April 2021. Retrieved 10 January 2024 – via Laws and Regulations Portal of the Islamic Republic of Iran.
