L. J. Greenberg, born Leopold Jacob Greenberg (1861–1931), was a British journalist. He had become an energetic propagandist of the new Zionism in England by the in 1899, at which he and Jacob de Haas were elected as members of the ZO's Propaganda Committee. His frequent dialectical debates were conducted as editor of The Jewish Chronicle, the leading paper in Britain for the Jewish community. Greenberg called for decency and humanity towards World Jewry.