Rabbi Yehuda Aryeh Leib Horowitz (? - 10th of Tammuz, 1964) was a prominent Chabad activist in Boston who organized the details of the visit of the Rebbe Rayatz to the city in 1930 (5690) and also founded the local Chabad synagogue. He was born in Smarhon and, in his youth, studied at Yeshivas Tomchei Temimim in Lubavitch until 1911 (5671).

In the winter of 1913 (5674), he immigrated to the United States and settled in Boston. In 1927 (5687), he established the Chabad synagogue in the city, and three years later, he was involved in organizing the Rebbe Rayatz's visit to the city as part of his campaign to strengthen American Jewry.

He passed away on the 10th of Tammuz, 1964 (5724), and was buried in the Jewish cemetery in Boston.