Jacob de Witt is the name of:
Jacob de Witt (1589—1674), Dutch burgomaster of Dordrecht Jacob de Wit (1695–1754), Dutch interior painter from Amsterdam Jacob H. De Witt (1784—1867), United States Representative from New York Jacob De Witt (1785—1859), Quebec businessman and political figure Jacob de Witt (comics), a fictional villain from DC Comics