Dargaz (Persian: درگز, also Romanized as Darreh Gaz and Dar Gaz; formerly, Moḩammadābād, Moḩammadābād Arbāb, and Muhammadābād) is a city in and the capital of Dargaz County, in Razavi Khorasan Province, Iran. At the 2006 census, its population was 34,305, in 9,196 families.