| Rapid River | |
| Pushpin Map: | USA Michigan |
| Pushpin Map Size: | 250 |
| Pushpin Map Caption: | Location within the state of Michigan |
| Subdivision Type1: | Country |
| Subdivision Name1: | USA |
| Subdivision Type2: | State |
| Subdivision Name2: | Michigan |
| Subdivision Type3: | Region |
| Subdivision Name3: | Northern Michigan |
| Subdivision Type4: | County |
| Subdivision Name4: | Kalkaska County |
| Source1 Location: | Cold Springs Township, Kalkaska County, Michigan |
| Source1 Coordinates: | 44.8386°N -85.0747°W |
| Mouth: | Torch River |
| Mouth Location: | Torch River, Kalkaska County, Michigan |
| Mouth Coordinates: | 44.8456°N -85.3225°W |
Rapid River is a 17adj=midNaNadj=mid[1] river in Kalkaska County in the U.S. state of Michigan. The river empties into the Torch River at the community of Torch River just south of Torch Lake.