Saul Lieberman (Hebrew: שאול ליברמן, May 28, 1898 – March 23, 1983), also known as Rabbi Shaul Lieberman or, among some of his students, The Gra"sh (Gaon Rabbeinu Shaul), was a rabbi and a Talmudic scholar. He served as Professor of Talmud at the Jewish Theological Seminary of America (JTSA) for over 40 years, and for many years was dean of the Harry Fischel Institute in Israel and also president of the American Academy for Jewish Research.