- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°33'1"N 3°42'0"W
- Eastings/Northings: 284819, 296080
- OS Grid: SN848960
- Mapcode Local: GBR 98.DHLT
- Mapcode Global: VH5BF.T576
Location and coordinates are for the approximate centre of Cwm Dwfn within this administrative area.
Geographic features and populated places may cross administrative borders.