Rabbi Aryeh Leib Baron (March 2, 1912 – October 3, 2011) was a Russian-born Canadian Haredi Jewish rabbi and rosh yeshiva (dean) of Yeshiva Merkaz HaTorah and the rabbi of Beis Medrash Merkaz HaTalmud in Montréal, Canada, as well as the founder of Yeshiva Ahavas Torah Baranovich in Jerusalem.