Meshulam Eliezer Leifer (Hebrew: משולם אליעזר לייפער; born January 23, 1979) is the fourth Rebbe of the Pittsburgh Hasidic dynasty.

He succeeded his father, Grand Rabbi Mordechai Yissachar Ber Leifer, upon the latter's death in October 2020.

[5] The Pittsburgher Hasidut numbers nearly 200 families in Ashdod,[6] and also has followers in Jerusalem, Bnei Brak, Beit Hilkia, New York City, and California.

[5] In the 2010s, Leifer began working with young men who were weak in their faith, strengthening them and drawing them closer to Torah and Hasidut.

[2] His eldest son (from a previous marriage), Rabbi Yekusiel Yehudah Leifer, is the son-in-law of the Spinka Rebbe of Monsey, New York.