Daniel Peter Williams (born 13 July 1973) is a British former professional boxer who competed from 1995 to 2020. He challenged once for the WBC heavyweight title against Vitali Klitschko in 2004. At regional level he held multiple heavyweight titles, including the Commonwealth title twice between 1999 and 2006; the British title twice between 2000 and 2010; and challenged once for the European title in 2003. As an amateur, he won bronze medals at the 1993 European Championships and 1994 Commonwealth Games. Williams is best known for scoring an upset knockout victory against Mike Tyson in 2004.