- Category: Water Feature
- Type: Island
- Latitude/Longitude: 57°53'20"N 5°28'15"W
- Eastings/Northings: 194356, 894132
- OS Grid: NG943941
- Mapcode Local: GBR D7WW.0V9
- Mapcode Global: WH076.YZ00
Location and coordinates are for the approximate centre of Gruinard Island within this administrative area.
Geographic features and populated places may cross administrative borders.