Marquis Franklin "Bill" Horr (May 2, 1880 – July 1, 1955) was an American football player, coach, and Olympic track and field athlete. He played college football as a tackle at Syracuse University and was selected as an All-American in 1908. At Syracuse, Horr also competed in track and field. At the 1908 Summer Olympics in London, he won a silver medal in the Greek Style discus throw and a bronze in the freestyle discus throw. Horr served as the head football coach at Northwestern University in 1909 and at Purdue University from 1910 to 1912, compiling a career record of 9–14–2.