Ab Darreh-ye Junak (Persian: اب دره جونك, also Romanized as Āb Darreh-ye Jūnak; also known as Āb Darreh) is a village in Dasht-e Rum Rural District, in the Central District of Boyer-Ahmad County, Kohgiluyeh and Boyer-Ahmad Province, Iran. At the 2006 census, its population was 82, in 12 families.