At the time of the 2006 National Census, the village's population was 1,359 in 286 households, when it was in Gholaman Rural District of the former Raz and Jargalan District of Bojnord County.[4] The following census in 2011 counted 1,540 people in 390 households.[5] The 2016 census measured the population of the village as 1,441 people in 393 households, by which time the district had been separated from the county in the establishment of Raz and Jargalan County, and the rural district was transferred to the new Gholaman District. Seyu Khosu was transferred to Rasteqan Rural District created in the district.[6] It was the most populous village in its rural district.[2]
^Seyu Khosavi Hashem can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3086298" in the "Unique Feature Id" form, and clicking on "Search Database".
^Rahimi, Mohammad Reza (c. 2021) [Approved 29 September 2013]. Distributional changes in North Khorasan province. qavanin.ir (Report) (in Persian). Ministry of the Interior, Cabinet of Ministers. Proposal 185757/42/4/1. Archived from the original on 8 January 2021. Retrieved 19 May 2023 – via Laws and Regulations Portal of the Islamic Republic of Iran.