- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°23'58"N 3°33'1"W
- Eastings/Northings: 294617, 279080
- OS Grid: SN946790
- Mapcode Local: GBR 9G.PY9Y
- Mapcode Global: VH5C3.DYYB
Location and coordinates are for the approximate centre of Cwm Cilgwyn within this administrative area.
Geographic features and populated places may cross administrative borders.