| Grey River | |
| Source1 Location: | Grey Lake |
| Mouth Location: | Serrano River |
| Subdivision Type1: | Country |
| Subdivision Name1: | Chile |
| Length: | 20km (10miles)[1] |
Grey River is a river located in the Magallanes Region of Chile. The river originates as the outflow of Grey Lake and flows for 20 km before it merges with the Serrano River.