Devon Williams (born January 17, 1994 in Marietta, Georgia) is an American athlete competing in the decathlon. He represented his country at the 2017 World Championships in London, where he finished 10th. His sister is fellow American track and field athlete Kendell Williams. His main personal bests are 8345 points in the decathlon (Athens 2017) and 6177 points in the indoor heptathlon (Gilliam, TX 2017).