| Légna | |
| Coordinates: | 46.4278°N 5.5947°W |
| Insee: | 39290 |
| Postal Code: | 39240 |
| Arrondissement: | Lons-le-Saunier |
| Canton: | Moirans-en-Montagne |
| Commune: | Valzin en Petite Montagne |
| Elevation Min M: | 370 |
| Elevation Max M: | 812 |
| Area Km2: | 10.30 |
| Population: | 200 |
| Population Date: | 2014 |
| Population Footnotes: | [1] |
Légna (pronounced as /fr/) is a former commune in the Jura department in Bourgogne-Franche-Comté in eastern France. On 1 January 2017, it was merged into the new commune Valzin en Petite Montagne.[2]