Jacques Pierre Fromentin (2 August 1754 – 19 October 1830) led a French division during the Flanders Campaign of 1793–1794.

Having served in the French Royal Army for ten years, he was appointed lieutenant colonel of a volunteer battalion in 1791.

In 1794, he led a combat division at Le Cateau, Beaumont, Grandreng, Erquelinnes and Gosselies.

After the battle of Gosselies, in which his division crumbled and routed, he was relieved of duty and stripped of rank in the ensuing scapegoat hunt after being accused of intoxication, though his rank was reinstated after he, through his father's intercession, was able to prove his weakness at the battle was the result of a starvation diet prescribed as treatment for his haemorrhoids, rather than by alcohol.

[1] Nevertheless, by this time, it was plain that he had only modest military ability and he was never given a field command again.