Donald Eugene Nehlen (born January 1, 1936) is a former American football player and coach. He was head football coach at Bowling Green State University (1968–1976) and at West Virginia University (1980–2000). Nehlen retired from coaching college football in 2001 with a career record of 202–128–8 and as the 17th winningest coach in college football history. He was inducted into the College Football Hall of Fame in 2005 and has served as a president of the American Football Coaches Association.