Dogonbadan (Persian: دوگنبدان; also Romanized as Do Gonbadān, Dow Gonbadān, and Du Gunbadān; also known as Gachsaran (Persian: گچساران), also Romanized as Gachsārān) is a city in and the capital of Gachsaran County, Kohgiluyeh and Boyer-Ahmad Province, Iran. At the 2006 census, its population was 81,902, in 18,264 families.