- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°3'28"N 3°50'45"W
- Eastings/Northings: 273532, 241571
- OS Grid: SN735415
- Mapcode Local: GBR Y2.DGND
- Mapcode Global: VH4H7.9J3P
Location and coordinates are for the approximate centre of Cwm Merchon within this administrative area.
Geographic features and populated places may cross administrative borders.