| Site of Special Scientific Interest | |
 View across the River Roach | |
| Location | Essex |
|---|---|
| Grid reference | TR030905 |
| Interest | Biological |
| Area | 10,702 hectares |
| Notification | 1993 |
| Location map | Magic Map |
Foulness SSSI is a 10,702 hectare biological Site of Special Scientific Interest covering the shoreline between Southend-on-Sea and the Crouch estuary in Essex.