Now Deh-e Arbab (, also Romanized as Now Deh-e Arbāb and Now Deh Arbāb; also known as Naudeh, Now Deh, and Now Deh-e Ānqolāb) is a city in, and the capital of, Now Deh-e Anqolab District of Khoshab County, Razavi Khorasan province, Iran.
At the 2006 census, its 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. The following census in 2011 counted 3,469 people in 1,050 households, by which time the district had been separated from the county in the establishment of Khoshab County, and Tabas Rural District became a part of the new Central District. The latest census in 2016 showed a population of 3,470 people in 1,149 households. It was the largest village in its rural district.
After the 2016 census, Now Deh-e Anqolab District was established, with the newly formed Now Deh-e Anqolab Rural District and Tabas Rural District as its subdivisions. Now Deh-e Arbab was elevated from village status to that of a city.