Mohammadabad (, also Romanized as MoḩammadÃÂbÃÂd; also known as MoḩammadÃÂbÃÂd-e Sar ChÃÂh-e Shà «r) is a village in Qaleh Zari Rural District, Jolgeh-e Mazhan District, Khusf County, South Khorasan Province, Iran. At the 2006 census, its population was 25, in 6 families.