Simon IV of Saarbrücken

Simon IV of Saarbrücken-Commercy (c. 1244–1308) was count of Saarbrücken and lord of Commercy. Son of Countess Mathilde of Saarbrücken, he shared in governing from 1266, succeeded his mother in 1274, and bought off his half-brothers' claims.

He faced the bishop of Metz, who claimed the county as a lapsed fief; allied with Duke Frederick III of Lorraine, he won St. Wendel and in 1277 settled with the bishop to hold the county as his fief. By his wife Margaret he fathered Johann I.