- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°35'47"N 3°31'16"W
- Eastings/Northings: 294724, 189721
- OS Grid: SS947897
- Mapcode Local: GBR HG.BQYY
- Mapcode Global: VH5H5.X49G
Location and coordinates are for the approximate centre of Cwm Ffasg within this administrative area.
Geographic features and populated places may cross administrative borders.