John II of Alençon (March 2, 1409, Château d'Argentan – September 8, 1476, Paris) is the son of John I of Alençon and his wife Marie of Brittany, Lady of La Guerche (1391–1446), daughter of John V, Duke of Brittany and Joan of Navarre.

He succeedshis father as Duke of Alençon and Count of Perche as a minor in 1415, after the latter's death at the Battle of Agincourt.

He is best known as a general in the Last Phase of the Hundred Years' War and for his role as a comrade-in-arms of Joan of Arc.