- Category: Water Feature
- Type: Island
- Latitude/Longitude: 55°34'9"N 1°38'21"W
- Eastings/Northings: 422848, 630670
- OS Grid: NU228306
- Mapcode Local: GBR J4Z1.WF
- Mapcode Global: WHC0T.S8LX
Location and coordinates are for the approximate centre of Annstead Rocks within this administrative area.
Geographic features and populated places may cross administrative borders.