William Andrew Nelson (born September 11, 1984, in Bakersfield, California, attended Taft Union High School) is an American steeplechase runner.

[6] He competed as a member of the U.S. track and field team in the men's 3000 m steeplechase, along with his teammates Anthony Famiglietti and Joshua McAdams.

Nelson ran in the second heat against thirteen other athletes, including Famiglietti, and France's Mahiedine Mekhissi-Benabbad, who later won the silver medal in the final.

He ran in a "Free Leonard Peltier" jersey in four races, including the Payton Jordan Invitational, where he won the steeplechase in a time of 8:28.40.

[9] Nelson currently resides in Boulder, Colorado, with his wife Alisa, and four children: Arabella Kennedy, Noah Andrew, Lonnie Jack and Wyatt Watkins.