William Allen Thompson (born October 10, 1946) is a former American football cornerback and safety in the National Football League. He was drafted by the Denver Broncos in the third round of the 1969 NFL Draft. He played college football at Maryland State College and was inducted intothe Hawk Hall of Fame in 1984. Thompson was a three-time Pro Bowl selection and was inducted into the Broncos Ring of Fame in 1987.