- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 53°22'34"N 4°29'21"W
- Eastings/Northings: 234500, 389500
- OS Grid: SH345895
- Mapcode Local: GBR HM9S.0BW
- Mapcode Global: WH425.0DHG
Location and coordinates are for the approximate centre of Llyn Llygeirian within this administrative area.
Geographic features and populated places may cross administrative borders.