- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 53°9'26"N 4°21'25"W
- Eastings/Northings: 242493, 364834
- OS Grid: SH424648
- Mapcode Local: GBR 5D.541N
- Mapcode Global: WH436.1WFX
Location and coordinates are for the approximate centre of Llyn Rhos-ddu within this administrative area.
Geographic features and populated places may cross administrative borders.