| Semeni | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Cluj County |
| Length: | 9.7km (06miles) |
| Mouth: | Crișul Repede |
| Mouth Location: | Negreni |
| Mouth Coordinates: | 46.9494°N 22.7794°W |
| Basin Size: | 29km2 |
The Semeni is a right tributary of the river Crișul Repede in Romania. It discharges into the Crișul Repede near Negreni. Its length is 10km (10miles) and its basin size is 29km2.