The Basel Cathedral owned a fief in Romont, which they assigned to Bourkard de la Roche in 1311. During the 14th and 15th century the noble Romont family owned a castle situated between Romont and Vauffelin. During the Middle Ages, Romont was part of the seigniory of Erguel which was owned by the Prince Bishop of Basel. After the 1797 French victory and the Treaty of Campo Formio, Romont became part of the French Département of Mont-Terrible. Three years later, in 1800 it became part of the Département of Haut-Rhin. After Napoleon's defeat and the Congress of Vienna, Romont was assigned to the Canton of Bern in 1815.