- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°31'30"N 3°50'11"W
- Eastings/Northings: 275500, 293500
- OS Grid: SN755935
- Mapcode Local: GBR 93.G015
- Mapcode Global: VH4DX.GS4M
Location and coordinates are for the approximate centre of Llyn Penrhaeadr within this administrative area.
Geographic features and populated places may cross administrative borders.