- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°49'14"N 3°59'3"W
- Eastings/Northings: 266380, 326630
- OS Grid: SH663266
- Mapcode Local: GBR 5W.VBMK
- Mapcode Global: WH567.RCWH
Location and coordinates are for the approximate centre of Llyn Hywel within this administrative area.
Geographic features and populated places may cross administrative borders.