BILLIKOPF, JACOB (1883–1950), U.S. social worker. Billikopf, born in Vilna, emigrated to the United States in the late 1890s. He was a son-in-law of Louis *Marshall. An imaginative administrator and fund raiser, receptive to fresh ideas, Billikopf became professionally active in labor relations as well as Jewish social work. He served as superintendent of the Jewish Settlement, Cincinnati (1904–05), of the United Jewish Charities of Milwaukee (1905–07), and of the United Jewish Charities, Kansas City, Missouri (1907). While in Kansas City Billikopf played an important role in the establishment of the pioneering municipal Board of Public Welfare. During World War i Billikopf directed the campaign to raise $25 million for Jewish war relief and in 1918 he directed the National Coordinating Committee for Aid to Refugees and Emigrants. He was appointed executive director of the Federation of Jewish Charities, Philadelphia (1919), which became his base for many services in the labor field. He was the impartial chairman of the Men's Clothing Industry, New York City, and the Ladies' Garment Industry, Philadelphia. In the 1930s he was appointed impartial chairman of the federal Regional Labor Board. Billikopf also served as vice president of the American Association for Old Age Security, chairman of the Committee of One Hundred on Unemployment Relief, Philadelphia (1930–31), and board chairman of the New York Clothing Unemployment Fund.