- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°39'16"N 3°52'30"W
- Eastings/Northings: 270383, 196770
- OS Grid: SS703967
- Mapcode Local: GBR H0.6S12
- Mapcode Global: VH4K4.SN7W
Location and coordinates are for the approximate centre of Cwm Crymlyn within this administrative area.
Geographic features and populated places may cross administrative borders.