- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°43'43"N 3°28'56"W
- Eastings/Northings: 299995, 315596
- OS Grid: SH999155
- Mapcode Local: GBR 9K.139P
- Mapcode Global: WH680.GNZZ
Location and coordinates are for the approximate centre of Cwm Dyfnant within this administrative area.
Geographic features and populated places may cross administrative borders.