Doubs (anc. Dubis), a river of France, the largest affluent of the Saone, and forming part of the navigable canal between the Rhone and the Rhine. It rises in Mount Rixou, one of the summits of the Jura, 3,000 ft. high, and after a tortuous course through the department which bears its name, flows S. W. through that of Jura and part of Saone-et-Loire, and joins the Saone near the village of Verdun. Its total length is about 280 m. Strong currents impede the navigation; at various points it forms small lakes, and it has a cataract, the Saut du Doubs, about 100 ft. high. Among its. affluents are the Dessoubre and the Savoureuse.

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Doubs, an E. department of France, in the old province of Franche-Comt6, bordering on Switzerland and on the departments of Haut-Rhin, Haute-Saone, and Jura; area, 2,018 sq. m.; pop. in 1872, 291,251. Its surface gradually rises from the more level country in the N. W. to the rugged and sterile peaks of the Jura range. The principal rivers are the Doubs and the Oignon, which divides it from Haute-Saone, but there is a large number of smaller streams. Agriculture is carried on to some extent, but the grain raised is insufficient for the home consumption. Much attention is paid to the raising of horses and cattle, and a considerable portion of the department is devoted to pasturage. There are some iron mines, which are worked, and coal, gypsum, building stone, and salt are also produced. The manufactures comprise clocks, paper, leather, woollen and cotton cloth, iron and steel ware, butter, cheese, etc. The climate is somewhat variable, but on the whole is cold, and in the lower parts much rain falls. The country is nevertheless healthful, and the inhabitants are vigorous and sturdy.

It is divided into the arrondissements of Besancon, Montbeliard, Baume-les-Dames, and Pontarlier. Capital, Besancon.