| Mud River | |
| Pushpin Map: | Georgia (U.S. state) |
| Pushpin Map Caption: | Location of mouth |
| Mouth Location: | Atlantic Ocean |
| Mouth Coordinates: | 31.5352°N -81.242°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Georgia |
The Mud River is a 6.4adj=midNaNadj=mid[1] tidal arm of the Sapelo River in McIntosh County, Georgia, in the United States. It forms the northern part of the channel separating Sapelo Island from the mainland.[2]