At the time of the 2006 National Census, the city's population was 11,098 in 2,933 households. The following census in 2011 counted 13,247 people in 3,627 households. The 2016 census measured the population of the city as 13,795 people in 4,130 households.
12سرشماري عمومي نفوس و مسكن 1395: استان خراسان جنوبی[General Population and Housing Census 2016: South Khorasan Province]. مرکز آمار ایران [Statistical Centre of Iran] (in Persian). Archived from the original(Excel) on 17 October 2020. Retrieved 19 December 2022.
↑Davoodi, Parviz (27 December 2008) [تاریخ تصویب (Approval date) 1387/10/07 (Iranian Jalali calendar)]. تصویب نامه در خصوص تغییر نام بخش مرکزی شهرستان «سرایان» از توابع استان خراسان جنوبی به بخش «آیسک»[Approval regarding changing the name of the Central District of "Sarayan" County from the functions of South Khorasan province to the "Aysak" District]. 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] 103364D2-D7C5-4E06-BD2F-C4FB888AD79C. Archived from the original on 28 December 2023. Retrieved 26 April 2026.
↑Aref, Mohammad Reza (25 July 2005) [تاریخ تصویب (Approval date) 1384/05/03 (Iranian Jalali calendar)]. اصلاحات تقسیماتی در استان های خراسان جنوبی و خراسان رضوی[Divisional reforms in South Khorasan and Razavi Khorasan provinces]. 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] 023D1F11-278C-4DAF-A732-4DF1474EDD2B. Archived from the original on 28 December 2023. Retrieved 26 April 2026.
↑سرشماري عمومي نفوس و مسكن 1385: استان خراسان جنوبی[General Population and Housing Census 2006: South Khorasan 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 خراسان جنوبی[General Population and Housing Census 2011: South Khorasan Province]. Iran Data Portal—Syracuse University (in Persian). مرکز آمار ایران [Statistical Centre of Iran]. Archived from the original(Excel) on 20 January 2023. Retrieved 19 December 2022.