- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 51°52'54"N 3°44'30"W
- Eastings/Northings: 280216, 221808
- OS Grid: SN802218
- Mapcode Local: GBR Y6.RQJN
- Mapcode Global: VH5FJ.3Y8Q
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.