| Derna | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Bihor County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Derna, Dernișoara, Hăucești, Sărsig |
| Length: | 13km (08miles) |
| Mouth: | Valea Fânețelor |
| Mouth Location: | Sărsig |
| Mouth Coordinates: | 47.2286°N 22.1889°W |
| Progression: | Valea Fânețelor→ |
The Derna is a right tributary of the river Valea Fânețelor in Romania. It flows into the Valea Fânețelor in Sărsig.[1] Its length is 13km (08miles).