- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°58'52"N 4°5'12"W
- Eastings/Northings: 260004, 344688
- OS Grid: SH600446
- Mapcode Local: GBR 5R.J9R5
- Mapcode Global: WH55F.6B7D
Location and coordinates are for the approximate centre of Llyn Hafod-y-llyn within this administrative area.
Geographic features and populated places may cross administrative borders.