| Limentra orientale | |
| Mouth Coordinates: | 44.2271°N 11.0621°W |
| Subdivision Type1: | Country |
The Limentra orientale (also: Limentra di Treppio) is a mountain river in Italy, a right tributary of the Reno. It rises from Monte la Croce in the Apennine Mountains. It enters the Metropolitan City of Bologna near Lentula and Treppio. Near Suviana a dam has been built on its course creating one of the largest reservoirs of the Apennines, with a capacity of about . It flows into the Reno after 41km (25miles), near Riola di Vergato.