Seloncourt (French pronunciation: [səlɔ̃kuʁ]) is a commune in the Doubs department in the Bourgogne-Franche-Comté region in eastern France.

Seloncourt lies 10 km (6.2 mi) from Montbéliard on the banks of the Gland, which flows into the Doubs at Audincourt.

The name of Seloncourt appears for the first time in 1170 in a deed of gift of a meix (House) made by Valner and Damjustin with the Abbey of Belchamp, but certainly existed well before this date.

It was separated in 1282, to enter, by constitution, in the Seigniory (Lordship) of Blamont until the reintegration of this Seigniory into the Count of Montbéliard and finally in the Canton of Hérimoncourt created by decree May 12, 1898.

Seloncourt was reattached to France in 1793 after the French Revolution.