Louis Israel Newman was a prominent United States Reform rabbi and author.
Born in Providence, Rhode Island on December 20, 1893 to Paul and Antonia (née Hecker) Newman, Louis Israel Newman attended Brown University (B.A. 1913), and then went on to receive an M.A. from the University of California, Berkeley in 1917, and a ph.D. from Columbia University in 1924. From 1913 to 1916 Newman served as rabbi of Congregation Beth Israel (Berkeley, California). In 1917, Newman became an assistant to Rabbi Stephen Wise at the Free Synagogue in New York City and then was ordained by Stephen Wise and Martin Meyer in 1918.
After his ordination, Newman became rabbi of the Bronx Free Synagogue (1918–21). In 1921, he became rabbi of Temple Israel in New York City and was appointed to the faculty of the Jewish Institute of Religion (JIR) when it was founded the following year. In 1924, Newman moved to San Francisco, replacing Martin Meyer as rabbi of Temple Emanu-El.
In 1930, Newman returned to New York City to become rabbi of Temple Rodeph Sholom. He stayed in this pulpit until his retirement in 1972. During his tenure at Temple Rodeph Sholom, Newman became active in the Zionist Revisionist movement, was the chairman of the Palestine Mandate Defense Fund, and was honorary chairman of both the Revisionist Tel Hai Fund and the American Friends of a Jewish Palestine. He once again served on the faculty of the JIR. He also served on the American advisory committee for the Hebrew University and as a vice president of the American Jewish Congress.