Mountain Ash is a community (as well as previous community) in the Cynon Valley, within the County District of Rhondda Cynon Taf, Wales. At the 2001 census, Mountain Ash had a population of 7,039 boosting to 7,374 at the 2011 Census. The Mountain Ash geographical area incorporates and includes the areas and also villages of Cefnpennar, Cwmpennar, Caegarw, Darranlas, Fernhill, Glenboi as well as Newtown. Mountain Ash lies within the historical region boundaries of Glamorgan. The town exists concerning 4.5 miles south of the community of Aberdare and also around 19 miles northwest of Cardiff. The town and also neighborhood of Penrhiwceiber exists around a mile south of Mountain Ash. From a management perspective, Mountain Ash is split into 2 selecting wards: Mountain Ash West takes into consideration the community centre, along with the districts of Miskin, Darranlas, Fernhill and also Glenboi; Mountain Ash East comprises the remaining districts of Cefnpennar, Cwmpennar, Caegarw and also Newtown.