- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 53°6'52"N 3°50'32"W
- Eastings/Northings: 276786, 359077
- OS Grid: SH767590
- Mapcode Local: GBR 62.7WMH
- Mapcode Global: WH54R.YZG5
Location and coordinates are for the approximate centre of Llyn Tynymynydd within this administrative area.
Geographic features and populated places may cross administrative borders.