The title of Duke of La Force, Peer of France, in the peerage of France, was created in 1637 for members of the Caumont family, who were lords of the village of La Force in the Dordogne region.
The family is Protestant : the father (François de Caumont) and brother of the first Duke were killed in the St. Bartholomew's Day Massacre (1572).
Armand de Caumont died in [1755] on the battlefield at Cuneo on 30 September, at the age of 23.
Afterwards, the dukedom passed to a distant relative of the main line, Bertrand (1724–1773), then to his son, Louis-Joseph Nompar (1768–1838) and to his descendants.
In 1909, the great-great-grandson of Louis-Joseph, Armand-Joseph (1878–1961), took the title of Duke of La Force.