| Name other | Latin: Ornia |
|---|---|
| Country | Spain |
| Length | 54 km (34 mi) |
| Source 1 | Union of the streams Cabrito and Ballina |
| Source1 location | Pobladura de la Sierra, Lucillo, Maragatería, León, Castile and León, Spain |
| Source1 elevation | 1,120 m (3,670 ft) |
| Mouth | Tuerto river |
| Mouth location | Requejo de la Vega, Soto de la Vega, Tierra de La Bañeza, León, Castile and León, Spain |
| Mouth elevation | 775 m (2,543 ft) |
| Tributaries left | Peces |
| Tributaries right | Espino, Llamas |
The Duerna is a river in the province of León, Spain. It begins at the convergence of the Cabrito and Ballina streams, in the town of Pobladura de la Sierra, in the Lucillo municipality.