Sochaux is a commune in the Doubs department in the Bourgogne-Franche-Comté region in eastern France. Sochaux lies 3 km east of …Sochaux is a commune in the Doubs department in the Bourgogne-Franche-Comté region in eastern France. Sochaux lies 3 km east of Montbéliard, and 484 km southeast of Paris. Inhabitants are known as Sochaliens.