- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°0'56"N 4°54'51"W
- Eastings/Northings: 200113, 239264
- OS Grid: SN001392
- Mapcode Local: GBR CN.H1PT
- Mapcode Global: VH1QG.RLVM
Location and coordinates are for the approximate centre of Cwm Gwylog within this administrative area.
Geographic features and populated places may cross administrative borders.