- Category: Water Feature
- Type: Island
- Latitude/Longitude: 51°47'26"N 0°57'7"E
- Eastings/Northings: 603696, 214353
- OS Grid: TM036143
- Mapcode Local: GBR SPD.ML4
- Mapcode Global: VHKGL.G872
Location and coordinates are for the approximate centre of Mersea Island within this administrative area.
Geographic features and populated places may cross administrative borders.