- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°59'23"N 4°56'23"W
- Eastings/Northings: 198240, 236469
- OS Grid: SM982364
- Mapcode Local: GBR CM.JTJX
- Mapcode Global: VH1QN.B79W
Location and coordinates are for the approximate centre of Cwm Gwyn within this administrative area.
Geographic features and populated places may cross administrative borders.