- Category: Water Feature
- Type: Island
- Latitude/Longitude: 55°29'34"N 1°35'52"W
- Eastings/Northings: 425499, 622180
- OS Grid: NU254221
- Mapcode Local: GBR K48X.TT
- Mapcode Global: WHC17.F68H
Location and coordinates are for the approximate centre of Greymare Rock within this administrative area.
Geographic features and populated places may cross administrative borders.