At the time of the 2006 National Census, Lahijan's population was 3,714 in 971 households, when it was a village in Lahijan Rural District.[5] The following census in 2011 counted 4,701 people in 1,364 households.[6] The 2016 census measured the population of the village as 5,430 people in 1,663 households. It was the most populous village in its rural district.[2]
After the census, Lahijan was elevated to the status of a city.[7]
^Lahijan can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3813365" in the "Unique Feature Id" form, and clicking on "Search Database".
^ abHabibi, Hassan (10 November 1392) [Approved 17 April 1376]. Changes in country divisions in East Azarbaijan province. rc.majlis.ir (Report) (in Persian). Ministry of the Interior, Political-Defense Commission of the Government Board. Notification 57400 17940 K. Archived from the original on 30 January 2014. Retrieved 6 December 2023 – via Research Center of the System of Laws of the Islamic Council of the Farabi Library of Mobile Users.
^Mokhbar, Mohammad (26 December 2023) [Approved 18 May 1402]. Letter of approval regarding country divisions in East Azarbaijan province. sdil.ac.ir (Report) (in Persian). Ministry of the Interior, Council of Ministers. Notification 88610/T60447H. Archived from the original on 30 May 2024. Retrieved 29 August 2024 – via Shahr Danesh Legal Research Institute.