- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 51°41'20"N 2°58'32"W
- Eastings/Northings: 332644, 199369
- OS Grid: ST326993
- Mapcode Local: GBR J6.4XW7
- Mapcode Global: VH79T.CTP2
Location and coordinates are for the approximate centre of Llandegfedd Reservoir within this administrative area.
Geographic features and populated places may cross administrative borders.