Fred Lowenthal (November 22, 1878 – October 4, 1931) was an American college football player, coach, sportswriter, and attorney. He served as head football coach at the University of Illinois at Urbana–Champaign in 1904, along with Arthur R. Hall, Justa Lindgren, and Clyde Mathews, and alone in 1905, compiling a record of 14–6–1. Lowenthal played football at Illinois as a center from 1898 to 1901.