- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°35'27"N 3°8'43"W
- Eastings/Northings: 320757, 188648
- OS Grid: ST207886
- Mapcode Local: GBR HZ.BX51
- Mapcode Global: VH6DV.F8KL
Location and coordinates are for the approximate centre of Cwm-Diffrwyth within this administrative area.
Geographic features and populated places may cross administrative borders.