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At the time of the 2006 National Census, the rural district's population was 10,767 in 2,438 households. There were 10,496 inhabitants in 2,913 households at the following census of 2011. The 2016 census measured the population of the rural district as 9,432 in 2,920 households. The most populous of its 11 villages was Malek-e Ashtar, with 2,672 people.
Habibi, Hassan (c. 2023) . Approval letter regarding the creation and establishment of Shirin Su District. qavanin.ir (Report) (in Persian). Ministry of the Interior, Political-Defense Commission of the Government Council. Resolution 93808/T907. Archived from the original on 20 March 2023. Retrieved 22 October 2023 – via Laws and Regulations Portal of the Islamic Republic of Iran.