| Grey | |
| Map Size: | 250 |
| Pushpin Map: | Australia Victoria |
| Pushpin Map Size: | 250 |
| Pushpin Map Caption: | Location of the Grey River mouth in Victoria |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | State |
| Subdivision Name2: | Victoria |
| Subdivision Type3: | Region |
| Subdivision Name3: | South East Coastal Plain (IBRA), The Otways |
| Subdivision Type5: | Local government area |
| Subdivision Name5: | Colac Otway Shire |
| Length: | 9km (06miles) |
| Source1: | Otway Ranges |
| Source1 Location: | below Muddy Saddle |
| Source1 Coordinates: | -38.6317°N 143.7883°W |
| Source1 Elevation: | 491m (1,611feet) |
| Mouth: | Addis Bay, Bass Strait |
| Mouth Location: | Grey River (town) |
| Mouth Coordinates: | -38.6828°N 143.8408°W |
| Mouth Elevation: | 0m (00feet) |
| River System: | Corangamite catchment |
| Custom Label: | National park |
| Custom Data: | Great Otway National Park |
| Extra: | [1] [2] |
The Grey River is a perennial river of the Corangamite catchment, located in the Otways region of the Australian state of Victoria.
The Grey River rises in the Otway Ranges in southwest Victoria and flows generally east by south towards the town of Grey River where the river reaches its mouth and empties into Addis Bay, part of Bass Strait, north of Cape Otway. From its highest point, the river descends over its 9km (06miles) course.[2]