- Category: Water Feature
- Type: Island
- Latitude/Longitude: 59°3'39"N 2°56'2"W
- Eastings/Northings: 346527, 1019720
- OS Grid: HY465197
- Mapcode Local: GBR M43S.BLG
- Mapcode Global: WH7BR.WJY1
Location and coordinates are for the approximate centre of Grass Holm within this administrative area.
Geographic features and populated places may cross administrative borders.