| Country: | Wales |
| Official Name: | Cwmpengraig |
| Coordinates: | 52.0042°N -4.4067°W |
| Community Wales: | Llangeler |
| Unitary Wales: | Carmarthenshire |
| Lieutenancy Wales: | Dyfed |
| Constituency Westminster: | Caerfyrddin |
| Constituency Welsh Assembly: | Carmarthen East and Dinefwr |
| Post Town: | LLANDYSUL |
| Postcode District: | SA44 |
| Postcode Area: | SA |
| Dial Code: | 01559 |
| Os Grid Reference: | SN3436 |
| Static Image: | File:Cwmpengraig - geograph.org.uk - 344822.jpg |
Cwmpengraig is a rural hamlet in Carmarthenshire, Wales, located in the Teifi Valley approximately 1.5miles from the village of Dre-fach Felindre.
Cwmpengraig is part of the Carmarthen Heritage Trails and also the Discover Carmathenshire ramblers trail for Dre-fach Felindre. Located just 1.5 miles from Dre-fach Felindre, Cwmpengraig is a small community with a history of woollen mill production. In the early 19th century, furling mills were established in Pentrecwrt, Dolwyon, Drefach and Cwmpengraig. By the beginning of the 20th century, substantial mills were built, employing 50-100 people. Mill cottages were built to house the employees although by the end of the 1920s the industry went into decline.
Through the centre of the hamlet runs the stream Nant Esgair which flows down into the rural village of Dre-fach Felindre. At the centre of the hamlet is Soar Chapel. A number of mill cottages still exist along the river valley.