| Lignon | |
| Pushpin Map: | France#France Auvergne-Rhône-Alpes |
| Source1 Coordinates: | 44.6294°N 4.0908°W |
| Mouth Coordinates: | 44.6678°N 4.2761°W |
| Subdivision Type1: | Country |
| Length: | 20.7km (12.9miles) |
| Source1 Elevation: | 1360m (4,460feet) |
| Mouth Elevation: | 308m (1,010feet) |
The Lignon (pronounced as /fr/) is a 20.7km (12.9miles) long river in the Ardèche département, southern France. Its source is at La Souche, in the Parc naturel régional des Monts d'Ardèche. It flows generally east-northeast. It is a right tributary of the Ardèche into which it flows between Meyras and Pont-de-Labeaume.
This list is ordered from source to mouth: