- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 53°16'11"N 4°21'38"W
- Eastings/Northings: 242671, 377371
- OS Grid: SH426773
- Mapcode Local: GBR HNL1.Z5R
- Mapcode Global: WH42S.Z2NK
Location and coordinates are for the approximate centre of Llyn Frogwy within this administrative area.
Geographic features and populated places may cross administrative borders.