David Lefkowitz (April 11, 1875 – June 5, 1955), a rabbi, led Temple Emanu-El in Dallas, Texas from 1920 to 1949, after having worked at Temple Israel in Dayton, Ohio. He opposed the rise of the Ku Klux Klan, which had been revived in 1915; it was strongly opposed to immigrants who were Jews and Catholics from eastern and southern Europe. He was a Founding Executive Committee Member of the Dayton Branch of the National Association for the Advancement of Colored People (NAACP).