At the time of the 2006 National Census, Now Deh-e Arbab's population was 3,896 in 1,012 households, when it was a village in Tabas Rural District of the former Khoshab District of Sabzevar County.[5] The following census in 2011 counted 3,469 people in 1,050 households,[6] by which time the district had been separated from the county in the establishment of Khoshab County. The rural district was transferred to the new Central District.[7] The 2016 census measured the population of the village as 3,470 people in 1,149 households. It was the most populous village in its rural district.[2]
After the census, the rural district was separated from the district in the formation of Now Deh-e Anqolab District,[4] and Now Deh-e Arbab was elevated to the status of a city.[8]
^Now Deh-e Arbab can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3077188" in the "Unique Feature Id" form, and clicking on "Search Database".
^Rahimi, Mohammadreza (28 February 2013) [Approved 28 June 1389]. Approval letter regarding definitions and national divisions in Sabzevar County. rc.majlis.ir (Report) (in Persian). Ministry of the Interior, Board of Ministers. Proposal 29266/42/1/4/1; Notification 149133/T44704H. Archived from the original on 20 December 2016. Retrieved 14 November 2023 – via Islamic Parliament Research Center.