Lignon (Ardèche)

{{Infobox river

| name = Lignon

| image = France Ardeche Jaujac 02.jpg

| image_caption = A bridge over the Lignon at Jaujac.

| pushpin_map = France#France Auvergne-Rhône-Alpes

| source1_location = La Souche

| source1_coordinates= {{coord|44|37|46|N|04|05|27|E}}

| mouth_location = Ardèche

| mouth_coordinates = {{coord|44|40|04|N|04|16|34|E|display=inline,title}}

| progression = {{RArdèche}}

| subdivision_type1 = Country

| subdivision_name1 = France

| length = {{convert|20.7|km|mi|abbr=on}}

| source1_elevation = {{convert|1360|m|ft|abbr=on}}

| mouth_elevation = {{convert|308|m|ft|abbr=on}}

| discharge1_avg =

| basin_size =

}}

The Lignon ({{IPA|fr|liɲɔ̃}}) is a {{convert|20.7|km|mi|abbr=on}} long river in the Ardèche département, southern France.{{sandre|id=V5000580|nom=Le Lignon}} 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.