Saint-Dié-des-Vosges is a commune in the Vosges department, Grand Est, northeastern France. It is a sub-prefecture of the department. Sa…Saint-Dié-des-Vosges is a commune in the Vosges department, Grand Est, northeastern France. It is a sub-prefecture of the department. Saint-Dié is located in the Vosges Mountains 80 km southeast of Nancy and 80 km southwest of Strasbourg. This route in the valley of the river Meurthe was always the more frequented, and first to get a rail line in 1864, so now it accommodates the primary road.