- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°48'31"N 3°28'39"W
- Eastings/Northings: 300500, 324500
- OS Grid: SJ005245
- Mapcode Local: GBR 6K.W1RL
- Mapcode Global: WH67M.KN7J
Location and coordinates are for the approximate centre of Llyn y Pennau within this administrative area.
Geographic features and populated places may cross administrative borders.