- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°0'0"N 4°54'57"W
- Eastings/Northings: 199929, 237530
- OS Grid: SM999375
- Mapcode Local: GBR CN.J19N
- Mapcode Global: VH1QG.QZZL
Location and coordinates are for the approximate centre of Cwm Mawr within this administrative area.
Geographic features and populated places may cross administrative borders.