René of Anjou (Rei Rainièr in Occitan) (16 January 1409 – 10 July 1480), also known as René I of Naples and Good King René (French Le bon roi René), is Duke of Anjou, Count of Provence (1434–1480), Count of Piedmont, Duke of Bar (1430–1480), Duke of Lorraine (1431–1453), King of Naples (1438–1442; titular 1442–1480), titular King of Jerusalem (1438–1480) and Aragon (1466–1480) (including Sicily, Majorca, Corsica).

He is the father of the English queen Margaret of Anjou, wife of King Henry VI of England and a key figure in the Wars of the Roses.