Morteau is a commune, in the Doubs department in the Bourgogne-Franche-Comté region, eastern France. It is situated in a widening of …Morteau is a commune, in the Doubs department in the Bourgogne-Franche-Comté region, eastern France. It is situated in a widening of the Doubs river valley. The proximity of Switzerland gives employment to trans-border workers, as well as providing customers for the businesses of the Morteau valley.