Vassiliy Valeryevich Jirov, sometimes known as Vasily Zhirov, is a Kazakhstani former professional boxer who competed from 1997 to 2009, and held the IBF cruiserweight title from 1999 to 2003. As an amateur he won a gold medal at the 1996 Olympics, as well as consecutive bronzes at the 1993 and 1995 World Championships, all in the light heavyweight division.

Amateur boxing is a variant of boxing practiced at the collegiate level, at the Olympic Games, Pan American Games and Commonwealth Games, as well as many associations.