Mazhan (Persian: ماژان) is a village in Jolgeh-ye Mazhan Rural District, Jolgeh-ye Mazhan District, Khusf County, South Khorasan province, Iran, serving as capital of both the district and the rural district.

At the 2006 National Census, its population was 420 in 125 households, when it was in the former Khusf District of Birjand County. The following census in 2011 counted 532 people in 149 households. The latest census in 2016 showed a population of 476 people in 151 households, by which time the district had been separated from the county in the establishment of Khusf County. It was the most populous village in its rural district.