At the time of the 2006 National Census, the county's population was 46,680 in 14,313 households. The following census in 2011 counted 25,912 people in 8,372 households. The 2016 census measured the population of the county as 24,913 in 8,588 households.
Administrative divisions
Tafresh County's population history and administrative structure over three consecutive censuses are shown in the following table.
123سرشماري عمومي نفوس و مسكن 1395: استان مرکزی[General Population and Housing Census 2016: Markazi Province]. مرکز آمار ایران [Statistical Centre of Iran] (in Persian). Archived from the original(Excel) on 17 October 2020. Retrieved 22 July 2026.
↑Habibi, Hassan (12 September 1990) [تاریخ تصویب (Approval date) 1369.6.21 (Iranian Jalali calendar)]. تصویب سازمان و سلسله تابعیت عناصر و واحدهای تقسیمات کشوی استان مرکزی به تابعیت شهر اراک[Approval of the organization and chain of citizenship of the elements and units of Markazi province's divisions to the citizenship of Arak city]. 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] C8D0283F-9CAE-434C-B258-560EA411B87C. شماره دوره [Course number] 69, شماره جلد [Volume number] 3. Archived from the original on 18 January 2024. Retrieved 22 July 2026.
12Rahimi, Mohammad Reza (13 February 2011) [تاریخ تصویب (Approval date) 1389/11/24 (Iranian Jalali calendar)]. تصویب نامه اصلاحات و تغییرات تقسیماتی در استان مرکزی[Approval of divisional reforms and changes in Markazi province]. صلح [Saleh] (in Persian). وزارت کشور [Ministry of the Interior]. هیات وزیران [Council of Ministers]. پیشنهاد شماره [Proposal No.] 163364/42/1/4. Archived from the original on 19 January 2024. Retrieved 22 July 2026.
12سرشماري عمومي نفوس و مسكن 1385: استان مرکزی[General Population and Housing Census 2006: Markazi Province]. مرکز آمار ایران [Statistical Centre of Iran] (in Persian). Archived from the original(Excel) on 20 September 2011. Retrieved 22 July 2026.
12سرشماري عمومي نفوس و مسكن 1390: استان مرکزی[General Population and Housing Census 2011: Markazi 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 22 July 2026.