- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 53°16'15"N 4°21'47"W
- Eastings/Northings: 242500, 377500
- OS Grid: SH425775
- Mapcode Local: GBR HNL1.XR9
- Mapcode Global: WH42S.Y1FP
Location and coordinates are for the approximate centre of Llyn Frogwy within this administrative area.
Geographic features and populated places may cross administrative borders.