Jacques Nompar de Caumont, 1st Duke of La Force (French pronunciation: [ʒak nɔ̃paːʁ də komɔ̃ dyk də la fɔʁs]) (30 December 1558[1] – 10 May 1652) was a Marshal of France and Peer of France.

[3] He survived the St. Bartholomew's Day Massacre in 1572,[4] but his father and older brother Armand were killed.

[5][6][7][8] As marquis de La Force, he served Henri IV, whose confidence he enjoyed.

He plotted with Henri de Rohan and participated in the successful defence of Montauban in 1621, after an 86-day siege by the king, although he was reconciled with Louis XIII the following year.

[4] La Force was made a marshal of France on 27 May 1622, to be employed as the Lieutenant-General of the Army of Piedmont.