Mountain Ash is a community (and also previous community) in the Cynon Valley, within the County Borough of Rhondda Cynon Taf, Wales. At the 2001 census, Mountain Ash had a population of 7,039 increasing to 7,374 at the 2011 Census. The Mountain Ash geographical location includes and also consists of the areas and towns of Cefnpennar, Cwmpennar, Caegarw, Darranlas, Fernhill, Glenboi as well as Newtown. Mountain Ash exists within the historical area borders of Glamorgan. The town exists concerning 4.5 miles south of the community of Aberdare as well as roughly 19 miles northwest of Cardiff. The town as well as area of Penrhiwceiber lies around a mile south of Mountain Ash. From an administrative point of view, Mountain Ash is divided into two electoral wards: Mountain Ash West takes into account the community centre, together with the areas of Miskin, Darranlas, Fernhill and Glenboi; Mountain Ash East consists of the continuing to be districts of Cefnpennar, Cwmpennar, Caegarw and also Newtown.