- Category: Water Feature
- Type: Island
- Latitude/Longitude: 50°13'0"N 3°41'16"W
- Eastings/Northings: 279664, 36577
- OS Grid: SX796365
- Mapcode Local: GBR QN.7S88
- Mapcode Global: FRA 385G.10V
Location and coordinates are for the approximate centre of Grant's Rock within this administrative area.
Geographic features and populated places may cross administrative borders.