| Una River | |
| Pushpin Map: | Brazil |
| River System: | Una River |
| Mouth Location: | Atlantic Ocean |
| Mouth Coordinates: | -13.3795°N -39.0453°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
The Una River is a river of Bahia state in eastern Brazil. It discharges into the Atlantic Ocean after flowing past the town of Valença.[1] The mouth of the river, in the form of a delta, contains 26 islands, the largest of which is Tinharé, where the Morro de São Paulo is located.