- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 53°15'31"N 4°31'39"W
- Eastings/Northings: 231500, 376500
- OS Grid: SH315765
- Mapcode Local: GBR HN62.T04
- Mapcode Global: WH42Q.FC85
Location and coordinates are for the approximate centre of Llyn Penrhyn within this administrative area.
Geographic features and populated places may cross administrative borders.