Simon IV may refer to:
Simon de Montfort (died 1188), sometimes called Simon IV de Montfort Simon de Montfort, 5th Earl of Leicester (died 1218), sometimes called Simon IV de Montfort (died ) (died ) Simon IV, Count of Saarbrücken (died 1308) Simon IV, Lord of Lippe (died 1429) (died 1499), count of Zweibrücken-Bitsch