At the time of the 2006 National Census, the village's population was 1,463 in 335 households, when it was in Yeylaq-e Jonubi Rural District of the former Yeylaq District of Qorveh County.[6] The following census in 2011 counted 1,644 people in 423 households,[7] by which time the district had been separated from the county in the establishment of Dehgolan County. The rural district was transferred to the new Bolbanabad District, and Sis was transferred to Sis Rural District created in the district.[4] The 2016 census measured the population of the village as 1,645 people in 477 households. It was the most populous village in its rural district.[2]
^Sis can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3085920" in the "Unique Feature Id" form, and clicking on "Search Database".
^ abDavodi, Parviz (8 August 1390) [Approved 2 October 1386]. Letter of approval regarding the reforms of national divisions in Kurdistan province. rc.majlis.ir (Report) (in Persian). Ministry of the Interior, Political-Defense Commission of the Government Board. Proposal 93023/42/4/1; Letter 58538/T26118H; Notification 160027/T38028K. Archived from the original on 29 October 2011. Retrieved 14 November 2023 – via Islamic Parliament Research Center.