| South Newport River | |
| Pushpin Map: | Georgia (U.S. state) |
| Pushpin Map Caption: | Location of mouth |
| Mouth Coordinates: | 31.5547°N -81.1945°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Georgia |
The South Newport River is a 42.6adj=midNaNadj=mid[1] river on the Atlantic coastal plain in the U.S. state of Georgia. It rises in Long County 3miles south of Walthourville and flows east-southeast, becoming the boundary between Liberty and McIntosh counties. It flows into Sapelo Sound, an arm of the Atlantic Ocean, south of St. Catherines Island.[2]
The river's name most likely is a transfer from Newport, Rhode Island.[3]