Alverstone Marshes
| Site of Special Scientific Interest | |
| Location | Isle of Wight |
|---|---|
| Grid reference | SZ572859 |
| Interest | Biological |
| Area | 83.8 hectare |
| Notification | 1951 |
| Location map | Natural England |
Alverstone Marshes (grid reference SZ572859) is an 83.8 hectare biological Site of Special Scientific Interest on the Isle of Wight, notified in 1951.
The Alverstone Marshes are the site of a wetland restoration project by the Royal Society for the Protection of Birds. It is also noted for water voles.