| Site of Special Scientific Interest | |
  Location within Wales | |
| Location | Pembrokeshire |
|---|---|
| Grid reference | SM830040 to SM960120 |
| Coordinates | 51°41′25″N 5°00′21″W / 51.69028°N 5.00594°W |
| Interest | Geological and Biological |
| Area | 2,192.1 hectares (5,417 acres) |
| Notification | 2002 |
Milford Haven Waterway, is a Site of Special Scientific Interest (SSSI) on Milford Haven Waterway in Pembrokeshire, South Wales, designated since 2002. The site is protected for a wide range of reasons, including its geology, marine environment and ecosystems, and to protect a diversity of flora and fauna.