In 2020, Chaharbagh District was separated from the county in establishing Chaharbagh County and renamed the Central District. The new county was divided into two districts of two rural districts each, with Chaharbagh as its capital and only city at the time.
Demographics
Population
At the time of the 2006 National Census, the district's population (as Chaharbagh District of Savojbolagh County in Tehran province) was 61,135 in 15,380 households. The 2016 census measured the population of the district as 77,409 in 23,430 households.
123سرشماري عمومي نفوس و مسكن 1395: استان البرز[General Population and Housing Census 2016: Alborz Province]. مرکز آمار ایران [Statistical Centre of Iran] (in Persian). Archived from the original(Excel) on 28 January 2020. Retrieved 22 June 2025.
123456Jahangiri, Eshaq (8 December 2020) [۱۳۹۹/۹/۱۸ تاریخ ابلاغ (Notification date 1399/9/18) (Iranian Jalali calendar)]. تصویب نامه در خصوص تقسیمات کشوری در شهرستان ساوجبلاغ استان البرز[Letter of approval regarding national divisions in Savojbolagh County, Alborz 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]. شماره۱۰۴۹۲۲/ت۵۷۲۶۱ه [Notification Number 104922/T57261H]. Archived from the original on 24 June 2021. Retrieved 20 June 2025.
↑Aref, Mohammad Reza (25 April 2005) [تاریخ تصویب (Approval date) 1384/02/05 (Iranian Jalali calendar)]. اصلاحات تقسیماتی در شهرستان ساوجبلاغ در استان تهران[Divisional reforms in Savojbolagh County in Tehran province]. 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] 0829A81C-4E9D-4A80-96B8-C87FAB130D12. Archived from the original on 18 March 2024. Retrieved 20 June 2025.
↑Larijani, Ali (23 June 2010) [تاریخ تصویب (Approval date) 1389/04/02 (Iranian Jalali calendar)]. قانون تأسیس استان البرز[Law on the establishment of Alborz province]. لام تا کام [Lam ta Kam] (in Persian). وزارت کشور [Ministry of the Interior]. مجلس شورای اسلامی [Islamic Consultative Assembly]. نامه شماره [Letter Number] 30588/412. Archived from the original on 16 December 2023. Retrieved 20 June 2025.
12سرشماري عمومي نفوس و مسكن 1385: استان تهران[General Population and Housing Census 2006: Tehran Province]. مرکز آمار ایران [Statistical Centre of Iran] (in Persian). Archived from the original(Excel) on 20 September 2011. Retrieved 22 June 2025.