- Category: Water Feature
- Type: Island
- Latitude/Longitude: 55°35'0"N 1°38'37"W
- Eastings/Northings: 422550, 632259
- OS Grid: NU225322
- Mapcode Local: GBR J3YW.X9
- Mapcode Global: WHC0M.QXDH
Location and coordinates are for the approximate centre of Southend Rock within this administrative area.
Geographic features and populated places may cross administrative borders.