Stefan Simon Olshavskyi, O.S.B.M. (born as Simeon Židik; Ukrainian: Стефан Симон Ольшавський, Hungarian: István Simon Olsavszky, Slovak: Štefan Simeon Olšavsky, c. 1695 – 24 December 1737) was the bishop of the Vicariate Apostolic for the Ruthenians in Mukacheve from 1733 to his death in 1737.