At the time of the 2006 National Census, the city's population was 7,364 in 1,980 households, when it was capital of the former Kiakola District in Qaem Shahr County. The following census in 2011 counted 7,691 people in 2,276 households. The 2016 census measured the population of the city as 8,040 people in 2,691 households, by which time the district had been separated from the county in the establishment of Simorgh County. Kiakola was transferred to the new Central District as the county's capital.
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.
12Rahimi, Mohammad Reza (19 December 2012) [تاریخ تصویب (Approval date) 29/9/1391 (Iranian Jalali calendar)]. تصویبنامه درخصوص تقسیمات کشوری در استان مازندران[Approval regarding national divisions in 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.] 121434/42/4/1. Archived from the original on 22 December 2017. Retrieved 13 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.
↑Habibi, Hassan (27 April 1997) [مصوب (Approved on) 1376,02,07 (Iranian Jalali calendar)]. تصويبنامه راجع به اصلاحات تقسيماتي در استان مازندران[Resolution on the 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 number] 14228/42/1/1. Archived from the original on 11 May 2023. Retrieved 4 January 2026.
↑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.