| Alceu | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Bihor County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Livada de Bihor |
| Length: | 20km (10miles) |
| Mouth: | Crișul Repede |
| Mouth Location: | Toboliu |
| Mouth Coordinates: | 47.0307°N 21.6942°W |
The Alceu is a left tributary of the river Crișul Repede in Romania. It discharges into the Crișul Repede in Toboliu. Its length is 20km (10miles).