- Category: Water Feature
- Type: Island
- Latitude/Longitude: 51°31'43"N 0°42'2"W
- Eastings/Northings: 490235, 181897
- OS Grid: SU902818
- Mapcode Local: GBR D6K.3PD
- Mapcode Global: VHDWK.STZW
Location and coordinates are for the approximate centre of Grass Eyot within this administrative area.
Geographic features and populated places may cross administrative borders.