- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°58'8"N 3°49'7"W
- Eastings/Northings: 277964, 342831
- OS Grid: SH779428
- Mapcode Local: GBR 63.JWCL
- Mapcode Global: WH66P.9MVT
Location and coordinates are for the approximate centre of Llyn Serw within this administrative area.
Geographic features and populated places may cross administrative borders.