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Pentyrch (Welsh: Pen-tyrch) 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 immediate surrounding area. The Pentyrch community includes the neighbouring village of Creigiau. People living in Pentyrch are commonly known as “Penterchyians”.
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.
At the 2001 census, Pentyrch contained 3,535 individuals, in 1,358 households.
It falls within the parliamentary constituency of Cardiff West and is represented by the Labour Party in the Houses of Commons and the National Assembly. The ward 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 for Cardiff North. A by-election for the Pentyrch ward 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.
The Pentyrch Community Council has thirteen elected (or co-opted) members, representing the villages of Pentyrch, Creigiau (including Capel Llanilltern) and Gwaelod y Garth (the three community wards) on a ratio of 6:5:2. 
On entering the village from Heol Goch, the visitor passes the playground, and on the left is Acapela Studio - a concert hall and recording studio - owned by harpist Catrin Finch and music and television producer Hywel Wigley. Acapela studio has hosted a series of acclaimed Welsh acts such as Gruff Rhys, Cerys Matthews and Charlotte Church as well as up and coming local and international music acts. Many programs for S4C and the BBC are filmed there. The building itself is converted from the former presbyterian Capel Horeb and contains a fully licensed bar. Opposite Acapela is the Lewis Arms public house.
Past these lies the village centre, containing a Spar general store which includes a Post Office, delicatessen, hairdressers, doctors, a veterinary practice and butchers. The focus of older buildings in the village is reached by forking left after entering the village, travelling down to the King's Arms pub, and St. Catwg's Church, at the lowest point of the village. Along with St. Catwg's Church and its lychgate, the King's Arms is a Grade 2 Listed Building. Originally a seventeenth century copyhold farm called Cae Golman, the King's Arms became established as a public house in the eighteenth century. In the lounge bar, can be found a fireplace with chamfered beam, dated 1711.
Housing is split between older housing and large developments of post-1970s housing.
Pentyrch Rangers football club is based in the village. The club has nearly 200 registered players and runs 10 junior and mini football teams in the Cardiff and District League.
Other amenities include a village hall and primary school. The village has some art on display, including a mural situated on the green on High corner.
In 1993, Pentyrch hosted its first National/Sunday League Cricket Match, as Glamorgan lost to Northamptonshire, becoming the country's smallest village to do so.
Pentyrch is covered by Fairwater Police Station.
- Lucie Jones, singer and model
- Robin Sowden-Taylor, rugby player, raised in Pentyrch
- Craig Williams MP, lives in Pentyrch and served as Cardiff City Councillor for Pentyrch ward from 2008-2015 
- "Ward population 2011". Retrieved 8 April 2015.
- "The suburb of Pentyrch". Cardiffians.co.uk. 1 August 2010. Retrieved 9 April 2013.
- Ruth Mosalski (1 July 2015). "Tories hold on to Pentyrch - but story of the night is a huge swing to Plaid's candidate Dafydd Wigley's son Hywel". Wales Online. Retrieved 14 January 2018.
- "Election results for Pontprennau & Old St Mellons - Cardiff Council Elections 2017 - Thursday, 4th May, 2017". Cardiff Council. Retrieved 14 January 2018.
- "Home - Protecting the environment, quality of life, and rural character of the four villages". Cyngor Cymuned Pentyrch Community Council. Retrieved 14 January 2018.
- "New Cardiff North MP Craig Williams steps down as city councillor". Wales Online. 21 May 2015. Retrieved 25 June 2015.