- Category: Water Feature
- Type: Island
- Latitude/Longitude: 53°13'34"N 4°31'47"W
- Eastings/Northings: 231211, 372902
- OS Grid: SH312729
- Mapcode Local: GBR 55.0Q21
- Mapcode Global: WH42X.D53H
Location and coordinates are for the approximate centre of Ynys Groes within this administrative area.
Geographic features and populated places may cross administrative borders.