- Category: Water Feature
- Type: Island
- Latitude/Longitude: 57°29'14"N 7°14'20"W
- Eastings/Northings: 86187, 856255
- OS Grid: NF861562
- Mapcode Local: GBR 88JY.117
- Mapcode Global: WGW3Y.S20B
Location and coordinates are for the approximate centre of Griomasaigh within this administrative area.
Geographic features and populated places may cross administrative borders.