- Category: Water Feature
- Type: Island
- Latitude/Longitude: 55°35'56"N 1°40'47"W
- Eastings/Northings: 420270, 633976
- OS Grid: NU202339
- Mapcode Local: GBR J3QP.3R
- Mapcode Global: WHC0M.5J9L
Location and coordinates are for the approximate centre of Greenhill Rocks within this administrative area.
Geographic features and populated places may cross administrative borders.