- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°50'40"N 4°5'15"W
- Eastings/Northings: 259500, 329500
- OS Grid: SH595295
- Mapcode Local: GBR 5R.SX47
- Mapcode Global: WH560.5RSL
Location and coordinates are for the approximate centre of Hafod-y-llyn within this administrative area.
Geographic features and populated places may cross administrative borders.