| Lonny | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Lonny.svg |
| Arrondissement: | Charleville-Mézières |
| Canton: | Rocroi |
| Insee: | 08260 |
| Postal Code: | 08150 |
| Mayor: | Mickaël Leclère[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Vallées et Plateau d'Ardenne |
| Coordinates: | 49.8164°N 4.5883°W |
| Elevation M: | 342 |
| Area Km2: | 4.69 |
Lonny (in French pronounced as /lɔni/) is a commune in the Ardennes department in northern France.