- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°41'20"N 3°6'56"W
- Eastings/Northings: 322973, 199501
- OS Grid: ST229995
- Mapcode Local: GBR J0.4YTY
- Mapcode Global: VH6D8.YT62
Location and coordinates are for the approximate centre of Cwm Llwynau within this administrative area.
Geographic features and populated places may cross administrative borders.