| Poșaga | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Alba County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Poșaga |
| Length: | 24km (15miles) |
| Mouth: | Arieș |
| Mouth Location: | Poșaga de Jos |
| Mouth Coordinates: | 46.426°N 23.455°W |
| Basin Size: | 111km2 |
| Tributaries Left: | Incești, Săgagea, Belioara |
The Poșaga is a small river in the Apuseni Mountains, Alba County, western Romania. It is a left tributary of the river Arieș. It flows through the municipality Poșaga, and joins the Arieș near the village Poșaga de Jos.[1] It is fed by several smaller streams, including Incești, Săgagea and Belioara. Its length is 24km (15miles) and its basin size is 111km2.