- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 53°18'19"N 4°28'53"W
- Eastings/Northings: 234748, 381583
- OS Grid: SH347815
- Mapcode Local: GBR HM9Y.XKX
- Mapcode Global: WH42K.456V
Location and coordinates are for the approximate centre of Llyn Llywenan within this administrative area.
Geographic features and populated places may cross administrative borders.