- Category: Water Feature
- Type: Island
- Latitude/Longitude: 53°25'30"N 4°22'57"W
- Eastings/Northings: 241778, 394681
- OS Grid: SH417946
- Mapcode Local: GBR HMKN.16K
- Mapcode Global: WH420.N56L
Location and coordinates are for the approximate centre of Ynys Gron within this administrative area.
Geographic features and populated places may cross administrative borders.