William Allen Thompson (born October 10, 1946) is an American former professional football player who was a cornerback and safety in the National Football League (NFL). Selected by the Denver Broncos in the third round of the 1969 NFL/AFL draft, he played college football at Maryland State College and was inducted into the 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.
Thompson played his entire 13-year career for the Denver Broncos from 1969 to 1981. During his career he was selected to the three Pro Bowls in 1977, 1978, and 1981 and was an All-Pro selection in 1977. He is currently third on the Broncos all-time list for games started with 179, tenth in games played with 179, and holds the club record for interception return yards at 784.