| Forest River | |
| Source1 Location: | Confluence of the North Branch and Middle Branch of Forest River, Walsh County near Fordville, North Dakota |
| Source1 Coordinates: | 48.2125°N -97.8086°W |
| Mouth Location: | Confluence with the Red River, Walsh County |
| Mouth Coordinates: | 48.3581°N -97.1458°W |
| Progression: | Forest River → Red River → Lake Winnipeg → Nelson River → Hudson Bay → Atlantic Ocean |
| Source1 Elevation: | 1101feet |
| Mouth Elevation: | 774feet |
| Length: | 81miles |
| Custom Label: | GNIS ID |
The Forest River is an 81adj=midNaNadj=mid[1] tributary of the Red River of the North in eastern North Dakota in the United States. It rises in Walsh County and flows southeast and east, past the towns of Fordville and Minto, and forms a confluence with the Red approximately north of Grand Forks.