At the time of the 2006 National Census, Kojur's population was 2,215 in 570 households, when it was a village in Tavabe-ye Kojur Rural District. The following census in 2011 counted 3,328 people in 1,017 households. The 2016 census measured the population as 3,120 people in 1,052 households, by which time the village of Kojur had been converted to a city.
12Rahimi, Mohammad Reza (25 July 2012) [مصوب (Approved on) 1391,05,04 (Iranian Jalali calendar)]. اصلاحات تقسيماتي در استان مازندران[Divisional reforms in Mazandaran province]. سامانه ملی قوانین و مقررات [National System of Laws and Regulations] (in Persian). وزارت کشور [Ministry of the Interior]. کمیسیون سیاسی دفاعی هیأت دولت [Political Defense Commission of the Government Board]. پيشنهاد شماره [Proposal numbers] 5622/42/4/1, 144980/42/4/1, and 40794/42/4/1. Archived from the original on 22 May 2023. Retrieved 22 December 2025.
12سرشماري عمومي نفوس و مسكن 1395: استان مازندران[General Population and Housing Census 2016: Mazandaran Province]. مرکز آمار ایران [Statistical Centre of Iran] (in Persian). Archived from the original(Excel) on 7 October 2021. Retrieved 19 December 2022.
↑Mousavi, Mir-Hossein (22 April 1987) [تاریخ تصویب (Approval date) 1366/02/02 (Iranian Jalali calendar)]. قوانین و مقررات› ایجاد و تشکیل تعداد 11 دهستان شامل روستاها، مزارع و مکانهای واقع در شهرستان نوشهر تابعه استان مازندران[Creation and formation of 11 rural districts including villages, farms and places in Nowshahr County, Mazandaran province]. مرکز پژوهشهای مجلس شورای اسلامی ایران [Research Center of the Islamic Consultative Assembly of Iran] (in Persian). وزارت کشور [Ministry of the Interior]. هیات وزیران [Council of Ministers]. پیشنهاد شماره [Proposal No.] 11263.5.53. Archived from the original on 4 December 2012. Retrieved 2 January 2026.
↑سرشماري عمومي نفوس و مسكن 1385: استان مازندران[General Population and Housing Census 2006: Mazandaran Province]. مرکز آمار ایران [Statistical Centre of Iran] (in Persian). Archived from the original(Excel) on 20 September 2011. Retrieved 25 September 2022.
↑سرشماري عمومي نفوس و مسكن 1390: استان مازندران[General Population and Housing Census 2011: Mazandaran Province]. Iran Data Portal—Syracuse University (in Persian). مرکز آمار ایران [Statistical Centre of Iran]. Archived from the original(Excel) on 19 January 2023. Retrieved 19 December 2022.