| Country: | Wales |
| Official Name: | Blaenrheidiol |
| Coordinates: | 52.4404°N -3.8167°W |
| Unitary Wales: | Ceredigion |
| Lieutenancy Wales: | Dyfed |
| Constituency Westminster: | Ceredigion Preseli |
| Constituency Welsh Assembly: | Ceredigion |
| Post Town: | Aberystwyth |
| Postcode District: | SY23 3 |
| Postcode Area: | SY |
| Population: | 495 |
| Population Ref: | (2011)[1] |
Blaenrheidol is a community in the county of Ceredigion, North Wales.[2] It lies in the Cambrian Mountains of Mid Wales, approximately 12miles east of Aberystwyth on the A44 road, and includes Pumlumon.
It includes the settlements of Ponterwyd, Ystumtuen and Llywernog.[3] As the name suggests, a large section of the Afon Rheidol is in the community as well as the large man-made reservoir of Nant-y-moch.