| St Leonards Salt Lagoon | |
| Pushpin Map: | Australia Victoria |
| Pushpin Relief: | 1 |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location in Victoria |
| Location: | Bellarine Peninsula, Victoria |
| Coords: | -38.1589°N 144.7111°W |
| Type: | Hypersaline, ephemeral |
| Catchment: | Local |
| Basin Countries: | Australia |
| Elevation: | 0m (00feet) |
St Leonards Salt Lagoon is a former marine embayment, isolated by coastal deposition from Port Phillip Bay, at St Leonards, Victoria, Australia. It now forms a shallow and hypersaline lake, of about, which is often dry. It is a Victorian Nature Reserve.[1]