At the time of the 2006 National Census, Dowrahak's population was 3,841 in 787 households, when it was a village in Howmeh Rural District. The following census in 2011 counted 4,413 people in 1,127 households. The 2016 census measured the population as 4,852 people in 1,361 households, by which time Dowrahak had been elevated to the status of a city.
12Rahimi, Mohammad Reza (19 September 2012) [تاریخ تصویب (Approval date) 1391/06/29 (Iranian Jalali calendar)]. تصویب نامه در خصوص تقسیمات کشوری در استان بوشهر[Approval regarding national divisions in Bushehr 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]. ابلاغیه [Notification] 186614/T47127K. Archived from the original on 1 December 2023. Retrieved 13 June 2025.
12سرشماري عمومي نفوس و مسكن 1395: استان بوشهر[General Population and Housing Census 2016: Bushehr Province]. مرکز آمار ایران [Statistical Centre of Iran] (in Persian). Archived from the original(Excel) on 3 August 2017. Retrieved 18 June 2025.
↑سرشماري عمومي نفوس و مسكن 1385: استان بوشهر[General Population and Housing Census 2006: Bushehr Province]. مرکز آمار ایران [Statistical Centre of Iran] (in Persian). Archived from the original(Excel) on 20 September 2011. Retrieved 18 June 2025.
↑سرشماري عمومي نفوس و مسكن 1390: استان بوشهر[General Population and Housing Census 2011: Bushehr Province]. Iran Data Portal—Syracuse University (in Persian). مرکز آمار ایران [Statistical Centre of Iran]. Archived from the original(Excel) on 3 April 2023. Retrieved 18 June 2025.