- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°32'38"N 3°33'22"W
- Eastings/Northings: 294563, 295145
- OS Grid: SN945951
- Mapcode Local: GBR 9G.DWLC
- Mapcode Global: VH5BJ.9BT6
Location and coordinates are for the approximate centre of Cwm Cerniog within this administrative area.
Geographic features and populated places may cross administrative borders.