- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 52°55'37"N 4°7'31"W
- Eastings/Northings: 257219, 338758
- OS Grid: SH572387
- Mapcode Local: GBR 5Q.MLB4
- Mapcode Global: WH55L.LPP9
Location and coordinates are for the approximate centre of Llyn Bach within this administrative area.
Geographic features and populated places may cross administrative borders.