Jean IV de Rieux

Jean IV de Rieux (June 27, 1447 – February 9, 1518), was a Breton noble and Marshal.

He was the son of Jean III de Rieux and Béatrice de Rohan-Montauban (1385–1414).

He is best known for being the commander of the Breton army against King Charles VIII of France, which ended in a crushing defeat at the Battle of Saint-Aubin-du-Cormier (1488).

He married Isabelle de Brosse (died 1527), daughter of Jean III de Brosse, Comte de Penthièvre.

Renée de Rieux, La Belle Châteauneuf, was one of his descendants.