- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°59'14"N 3°4'50"W
- Eastings/Northings: 325891, 232667
- OS Grid: SO258326
- Mapcode Local: GBR F3.JSKS
- Mapcode Global: VH78D.K98Q
Location and coordinates are for the approximate centre of Cwm Brychen within this administrative area.
Geographic features and populated places may cross administrative borders.