Doubs is a 430 km long river in eastern France and western Switzerland. Its source is near Mouthe in the western Jura mountains. First it flows north-east, more or less along the French-Swiss border (forming the border for approx. 40 km). Near Montbéliard it turns south-west, until it flows into the river Saône in Verdun-sur-le-Doubs , approx. 20 km north-east of Chalon-sur-Saône.

The Doubs flows through the following départements, cantons and cities:

• Doubs (F, named after the river): Pontarlier.
• Canton of Neuchâtel (CH).
• Canton of Jura (CH): Saint-Ursanne.
• Doubs (F): Montbéliard, Besançon.
• Jura (F): Dole.
• Saône-et-Loire (F): Verdun-sur-le-Doubs .

A tributary of the Doubs is the river Loue .