Doubs (/duː/, doo; French: [du] ⓘ; Arpitan: Dubs) is a department in the Bourgogne-Franche-Comté region in Eastern France.

As early as the 13th century, inhabitants of the northern two-thirds of Doubs spoke Franc-Comtois, a dialect of the langues d'oïl.

Many famous people, including Mirabeau, Toussaint Louverture and Heinrich von Kleist, were imprisoned in the Château de Joux.

However, the commune of Le Cerneux-Péquignot was annexed by the Canton of Neuchâtel under the terms of the 1814 Treaty of Paris, and since remained Swiss territory.

Victor Hugo, Gustave Courbet, Armand Peugeot, Auguste and Louis Lumière and Frank Darabont are among the famous people born in Doubs.