| Boian | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Bihor County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Huta, Boianu Mare, Păgaia |
| Length: | 8km (05miles) |
| Mouth: | Inot |
| Mouth Location: | Păgaia |
| Mouth Coordinates: | 47.4035°N 22.5046°W |
| Progression: | Inot→ |
| Basin Size: | 16km2 |
| Custom Label: | River code |
| Custom Data: | III.1.44.33.13.1 |
The Boian is a left tributary of the river Inot in Romania. It flows into the Inot in Păgaia. Its length is 8km (05miles) and its basin size is 16km2.