| Pianul | |
| Name Other: | Pián-patak |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Alba County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Strungari, Pianu de Sus, Pianu de Jos, Vințu de Jos |
| Length: | 33km (21miles) |
| Mouth: | Mureș |
| Mouth Location: | Vințu de Jos |
| Mouth Coordinates: | 45.9966°N 23.4728°W |
| Basin Size: | 122km2 |
| Tributaries Left: | Penelu Recii, Ghenea, Valea Lei |
| Tributaries Right: | Valea Tonii |
The Pianul (Hungarian: Pián-patak) is a left tributary of the river Mureș in Transylvania, Romania. It discharges into the Mureș in Vințu de Jos.[1] Its length is 33km (21miles) and its basin size is 122km2.