- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°49'58"N 3°41'49"W
- Eastings/Northings: 285768, 327516
- OS Grid: SH857275
- Mapcode Local: GBR 68.TGF4
- Mapcode Global: WH67J.51RZ
Location and coordinates are for the approximate centre of Llyn Garneddwen within this administrative area.
Geographic features and populated places may cross administrative borders.