| Lonea | |
| Name Other: | Luna |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Cluj County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Panticeu, Pâglișa, Dăbâca, Luna de Jos |
| Length: | 37km (23miles) |
| Mouth: | Someșul Mic |
| Mouth Location: | Fundătura |
| Mouth Coordinates: | 46.9542°N 23.8026°W |
| Basin Size: | 182km2 |
| Tributaries Right: | Groapa Gomboșoaiei |
The Lonea (also: Luna) is a left tributary of the river Someșul Mic in Romania. It discharges into the Someșul Mic in Fundătura.[1] Its length is 37km (23miles) and its basin size is 182km2.