| Valea Iașului | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Argeș County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Brătești, Ruginoasa, Bădila, Valea Iașului |
| Length: | 12km (07miles) |
| Mouth: | Argeș |
| Mouth Location: | Curtea de Argeș |
| Mouth Coordinates: | 45.1542°N 24.67°W |
| Basin Size: | 34km2 |
The Valea Iașului is a left tributary of the river Argeș in Romania. It flows into the Argeș in Curtea de Argeș. Its length is 12km (07miles) and its basin size is 34km2.