| Una River | |
| Pushpin Map: | Brazil |
| River System: | Paraguaçu River |
| Mouth Coordinates: | -12.9247°N -41.056°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
The Una River is a river of Bahia state in eastern Brazil. It is a small river that starts in Serra Geral and flows near Iramaia (in the Centro Sul Baiano mesoregion) before discharging into the Paraguaçu River.