Bethlehem Chapel, Mountain Ash

South Wales (Welsh: De Cymru) is a loosely defined region of Wales bordered by England to the east and mid Wales to the north. It has a population of around 2.2 million, almost three-quarters of the whole of Wales, including 400,000 in Cardiff, 250,000 in Swansea and 150,000 in Newport. Generally considered to include the historic counties of Glamorgan and Monmouthshire, south Wales extends westwards to include Carmarthenshire and Pembrokeshire. In the western extent, from Swansea westwards, local people would probably recognise that they lived in both south Wales and west Wales. The Brecon Beacons National Park covers about a third of south Wales, containing Pen y Fan, the highest British mountain south of Cadair Idris in Snowdonia. A point of some discussion is whether the first element of the name should be capitalised: 'south Wales' or 'South Wales'. As the name is a geographical expression rather than a specific area with well-defined borders, style guides such as those of the BBC and The Guardian use the form 'south Wales'. However the more authoritative style guide by the Welsh Government on their international gateway website, Wales.com, states that it should always be capitalised. It is always capitalised on motorway signs.

Mountain Ash (Welsh: Aberpennar) is a town and former community in the Cynon Valley, within the County Borough of Rhondda Cynon Taf, Wales, with a population of 11,230 at the 2011 Census, estimated in 2019 at 11,339. It includes the districts and villages of Cefnpennar, Cwmpennar, Caegarw, Darranlas, Fernhill, Glenboi and Newtown, all within the historic county boundaries of Glamorgan. Aberdare lies about 4.5 miles (7.2 km) north-west, Cardiff 19 miles (31 km) south-east, and Penrhiwceiber a mile to the south-east. It divides into two communities (civil parishes): West covers the town centre and the districts of Miskin, Darranlas, Fernhill and Glenboi, and East the districts of Cefnpennar, Cwmpennar, Caegarw and Newtown.

Darrenlas is a large village in Mountain Ash, Rhondda Cynon Taf in South Wales.

Mountain Ash Urban District was a local authority in Mountain Ash, in the Cynon Valley, Glamorgan, Wales. It was created in 1894 as a result of the 1894 Local Government of England and Wales Act.The Council existed until 1973 and replaced the Mountain Ash Local Board of Health which had functioned since the 1870s. Initially, the Council had fifteen members, but this was increased to eighteen in 1898. The council was based at Mountain Ash Town Hall.

Mountain Ash Town Hall (Welsh: Neuadd y Dref Aberpennar) is a municipal structure in Ffrwd Crescent, Mountain Ash, Rhondda Cynon Taf, Wales. The town hall, which was the headquarters of Mountain Ash Urban District Council, is a Grade II listed building.

Rhos, Mountain Ash was a Baptist chapel in Mountain Ash, Glamorgan, Wales. Services at Rhos were conducted in the Welsh language.

Mountain Ash Cardiff Road railway station served the town of Mountain Ash, Rhondda Cynon Taf, Wales, from 1864 to 1964 on the Vale of Neath Railway.

Bethania is an Independent chapel in Phillip Street, Mountain Ash, Glamorgan, Wales. Services at Bethania are conducted in the Welsh language.

Mountain Ash Railway Station (Welsh: Gorsaf Reilffordd Aberpennar) is a railway station serving the town of Mountain Ash in Rhondda Cynon Taf, Wales. It is located on the Aberdare branch of the Merthyr Line and on the banks of the Afon Cynon, a major river in the town of Mountain Ash. Passenger services are provided by Transport for Wales and run to all Valley Lines destinations.

Mountain Ash General Hospital (Welsh: Ysbyty Cyffredinol Mountain Ash) was a health facility on Duffryn Road, Mountain Ash, Rhondda Cynon Taf, Wales. It was managed by the Cwm Taf Morgannwg University Health Board.

Mountain Ash East is a community and coterminous electoral ward in Rhondda Cynon Taf, Wales. It primarily includes the part of the town of Mountain Ash east of the River Cynon. The community was formed in 2016 when the larger community of Mountain Ash was divided into East and West to match the ward boundaries.

Mountain Ash Comprehensive School (Welsh: Ysgol Gyfun Aberpennar), known as MACS, is a comprehensive school near the town of Mountain Ash, Rhondda Cynon Taf, Wales. It is a mixed-sex school with approximately 950 pupils, including about 90 in the sixth form. The school was formerly known as Mountain Ash Grammar School (Welsh: Ysgol Ramadeg Aberpennar) and is located near the former Dyffryn Colliery.