- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 51°52'45"N 3°44'14"W
- Eastings/Northings: 280500, 221500
- OS Grid: SN805215
- Mapcode Local: GBR Y6.RZHK
- Mapcode Global: VH5FQ.51J6
Location and coordinates are for the approximate centre of Llyn y Fan Fach within this administrative area.
Geographic features and populated places may cross administrative borders.