| Official Name: | Pen-y-cae |
| Country: | Wales |
| Static Image Name: | Bi-colour keystones on two semi-detached houses in Pen-y-cae.jpg |
| Static Image Caption: | Housing in Pen-y-cae |
| Os Grid Reference: | SN843137 |
| Coordinates: | 51.8102°N -3.6774°W |
| Postcode Area: | SA |
| Postcode District: | SA9 |
| Post Town: | SWANSEA |
| Dial Code: | 01639 |
| Constituency Westminster: | Brecon and Radnorshire |
| Community Wales: | Ystradgynlais |
| Unitary Wales: | Powys |
| Lieutenancy Wales: | Powys |
| Constituency Welsh Assembly: | Brecon and Radnorshire |
Pen-y-cae is a village in Powys, Wales in the Brecon Beacons National Park between Abercraf and Craig-y-Nos Castle, in the community of Tawe-Uchaf. The village is mostly a linear settlement along the A4067 which runs approximately parallel to the River Tawe. Pen-y-cae has a school and two pubs, the Pen-y-cae Inn in the centre of the village[1] and the Ancient Briton, close to Ynyswen.