- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°21'40"N 3°52'43"W
- Eastings/Northings: 272162, 275342
- OS Grid: SN721753
- Mapcode Local: GBR 91.S7NP
- Mapcode Global: VH4FN.QX98
Location and coordinates are for the approximate centre of Llyn Frongoch within this administrative area.
Geographic features and populated places may cross administrative borders.