At the time of the 2006 National Census, Karasf's population was 2,869 in 753 households, when it was a village in Karasf Rural District. The following census in 2011 counted 4,381 people in 1,221 households. The 2016 census measured the population as 3,083 people in 965 households, by which time the village had been converted to a city.
12Rahimi, Mohammad Reza (10 July 2013) [تاریخ تصویب (Approval date) 1392/04/19 (Iranian Jalali calendar)]. شناخته شدن روستای کرسف از توابع شهرستان خدابنده در استان زنجان به عنوان شهر کرسف[Karasf village, a part of Khodabandeh County in Zanjan province, is recognized as the city of Karasf]. مهدی داودآبادی [Mehdi Davudabadi] (in Persian). وزارت کشور [Ministry of the Interior]. کمیسیون سیاسی دفاعی هیأت دولت [Political Defense Commission of the Government Board]. پیشنهاد شماره [Proposal Number] 142387/42/1/4. Archived from the original on 25 June 2025. Retrieved 25 June 2025.
12سرشماري عمومي نفوس و مسكن 1395: استان زنجان[General Population and Housing Census 2016: Zanjan Province]. مرکز آمار ایران [Statistical Centre of Iran] (in Persian). Archived from the original(Excel) on 27 April 2022. Retrieved 19 December 2022.
↑Mousavi, Mir-Hossein (9 November 1986) [تاریخ تصویب (Approval date) 1365/08/18 (Iranian Jalali calendar)]. ایجاد و تشکیل تعداد 9 دهستان شامل روستاها و مزارع و مکانها در شهرستان خدابنده تابع استان زنجان[Creation and formation of nine rural districts, including villages, farms and places in Khodabandeh County under Zanjan province]. لام تا کام [Lam ta Kam] (in Persian). وزارت کشور [Ministry of the Interior]. هیات وزیران [Council of Ministers]. شناسه [ID] 66E9DE86-7D23-4721-A9AF-C99963BDD1D6. شماره دوره [Course number] 65, شماره جلد [Volume number] 5. Archived from the original on 18 December 2023. Retrieved 25 June 2025.
↑Habibi, Hassan (19 February 1995) [تاریخ تصویب (Approval date) 1373/11/30 (Iranian Jalali calendar)]. ایجاد و اصلاحات در محدوده استان زنجان[Establishment and reforms within the province of Zanjan]. لام تا کام [Lam ta Kam] (in Persian). وزارت کشور [Ministry of the Interior]. کمیسیون سیاسی دفاعی هیأت دولت [Political Defense Commission of the Government Board]. شناسه [ID] D07D9EBB-7EF5-4B68-9A5E-0CD1217E5519. شماره دوره [Course number] 73, شماره جلد [Volume number] 254. Archived from the original on 17 December 2023. Retrieved 25 June 2025.
↑سرشماري عمومي نفوس و مسكن 1385: استان زنجان[General Population and Housing Census 2006: Zanjan 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 زنجان[General Population and Housing Census 2011: Zanjan Province]. Iran Data Portal—Syracuse University (in Persian). مرکز آمار ایران [Statistical Centre of Iran]. Archived from the original(Excel) on 21 January 2023. Retrieved 19 December 2022.