- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°28'22"N 3°34'38"W
- Eastings/Northings: 290539, 176062
- OS Grid: SS905760
- Mapcode Local: GBR HD.LGVM
- Mapcode Global: VH5HQ.Y73Q
Location and coordinates are for the approximate centre of Cwm Alun within this administrative area.
Geographic features and populated places may cross administrative borders.