- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°49'8"N 3°58'32"W
- Eastings/Northings: 266955, 326440
- OS Grid: SH669264
- Mapcode Local: GBR 5X.VDQB
- Mapcode Global: WH567.WDZQ
Location and coordinates are for the approximate centre of Llyn y Bi within this administrative area.
Geographic features and populated places may cross administrative borders.