Yaakov Dovid Wilovsky was a rabbi and educator in the mid-19th and turn of the 20th centuries. He served as a rabbi of several communities in Lithuania and Belarus and founded a yeshiva in Slutsk, Belarus, before emigrating to the United States, where he was elected elder rabbi by the United Orthodox Rabbis of America. Toward the end of his life, he emigrated to Israel, establishing a yeshiva in Safed. He is known for two central commentaries that he composed on the Jerusalem Talmud, Chiddushei Ridvaz and Tosfot Rid.