William Arlen Jennings (March 13, 1918 – June 8, 2002) was an American football player and coach. He served as the head football coach of the University of Nebraska–Lincoln from 1957 to 1961. He coached the Nebraska Cornhuskers for five losing seasons, compiling a 15–34–1 record (.310). His best seasons were 1959 and 1960, when the Huskers were 4–6 in each year. His conference record was 8–24 (.250) and his Husker teams never won more than two conference games in a season. Jennings died on June 8, 2002, at the age of 84 at his home in Lawrence, Kansas after suffering from prostate cancer.