Coordinates: 51°31′44″N 3°17′50″W / 51.52883°N 3.29735°W / 51.52883; -3.29735
Pentyrch is a village and community located on the western outskirts of Cardiff, the capital city of Wales. The village gives its name to a Cardiff local authority electoral ward, Pentyrch, which covers the village and surrounding area. Welsh-speakers make up 20% of the town's population, making it the most Welsh-speaking district in the capital.
The village is situated next to the Garth Mountain, high above the River Taff.
The village can be reached from junction 32 of the M4 Motorway, then A470, then via Heol Goch, a hill flanked by a quarry and nature reserve. Alternatively, Church Road provides access from Llantrisant Road near St Fagans.
Other approaches are from Creigiau and Gwaelod-y-Garth.
At the 2001 census, Pentyrch contained 3,535 individuals, in 1,358 households.
Pentyrch became the newest addition to the Cardiff unitary authority in 1996. The electoral ward of Pentyrch falls within the parliamentary constituency of Cardiff West. It is bounded by Rhondda Cynon Taf to the north; and by the wards of Whitchurch & Tongwynlais to the east; Radyr & Morganstown to the southeast; and Creigiau & St. Fagans to the southwest. Pentyrch was represented by Conservative councillor Craig Williams on Cardiff Council until he stepped down in 2015 following his election to Parliament. A by-election took place on Tuesday 30 June 2015 which despite a 27% swing to Plaid Cymru's Hywel Wigley resulted in a narrow win for Conservative candidate Gavin Hill-John by 18 votes. Pentyrch ward is part of Cardiff West constituency and represented by the Labour Party in the Houses of Commons and the National Assembly.