| Mociu | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Cluj County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Mociu, Legii |
| Length: | 11km (07miles) |
| Mouth: | Fizeș |
| Mouth Location: | Geaca |
| Mouth Coordinates: | 46.853°N 24.086°W |
| Basin Size: | 44km2 |
The Mociu is a left tributary of the river Fizeș in Romania. It flows into the Fizeș near Geaca. Its length is 11km (07miles) and its basin size is 44km2.