| Otter River | |
| Pushpin Map: | Minnesota |
| Pushpin Map Caption: | Mouth of the Otter River |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
The Otter River is a short connecting stream in Minnesota, flowing from Boulder Lake Reservoir into Island Lake Reservoir. The stream's length is .[1] It is within the Cloquet River watershed, north of Duluth.