At the time of the 2006 National Census, the village's population was 602 in 158 households, when it was in Meyghan Rural District of the Central District.[5] The following census in 2011 counted 527 people in 156 households.[6] The 2016 census measured the population of the village as 582 people in 169 households.[2]
In 2020, Seyedal was separated from Shusef District in the establishment of Sardaran District to join Seyedal Rural District created in the new district.[4]
^Seyedal can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3083569" in the "Unique Feature Id" form, and clicking on "Search Database".
^ ab"Reforming national divisions in South Khorasan province". dolat.ir (in Persian). Ministry of the Interior, Council of Ministers. 12 November 2019 [Approved 4 November 2019]. Archived from the original on 2 November 2020. Retrieved 23 November 2023 – via Secretariat of the Government Information Council.