- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°58'17"N 3°42'53"W
- Eastings/Northings: 282305, 231727
- OS Grid: SN823317
- Mapcode Local: GBR Y7.KZ3N
- Mapcode Global: VH5F4.KQJ0
Location and coordinates are for the approximate centre of Cwm Tan-y-Mynydd within this administrative area.
Geographic features and populated places may cross administrative borders.