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At the time of the 2006 National Census, the city's population was 5,036 in 1,225 households. The following census in 2011 counted 4,242 people in 1,155 households. The 2016 census measured the population of the city as 4,436 people in 1,290 households.
Seh Qaleh can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3083433" in the "Unique Feature Id" form, and clicking on "Search Database".
Aref, Mohammad Reza (c. 2023) . Divisional reforms in South Khorasan and Razavi Khorasan provinces. lamtakam.com (Report) (in Persian). Ministry of the Interior, Political-Defense Commission of the Government Board. Proposal 1.4.42.126699; Notification 26896/T32435K. Archived from the original on 28 December 2023. Retrieved 28 December 2023 – via Lam ta Kam.