Doux (river)

{{Infobox river

| name = Doux

| image = Gorges du Doux, Ardèche.jpg

| image_caption = Gorges du Doux

| map = Doux (rivière).png

| source1_location = Massif Central

| mouth = Rhône

| mouth_location = Tournon-sur-Rhône

| mouth_coordinates = {{coord|45.0729|4.8292|format=dms|display=inline,title}}

| progression = {{RRhône}}

| subdivision_type1 = Country

| subdivision_name1 = France

| length = {{convert|70|km|abbr=on}}

| source1_elevation =

| discharge1_avg =

| basin_size =

}}

The Doux ({{IPA|fr|du|-|LL-Q150 (fra)-LoquaxFR-doux.wav}}; {{langx|oc|Dòç}}) is a tributary of the Rhône in the Haute-Loire and Ardèche departments, France. It is {{cvt|70|km|0}} long.{{Sandre|id=V37-0400|nom=Le Doux}} It begins in the Massif Central and joins the Rhône in Tournon-sur-Rhône. It passes through the town Lamastre. The Chemin de fer du Vivarais heritage railway from Tournon-sur-Rhône to Lamastre runs through the Doux valley.