Vassiliy Valeryevich Jirov (; born 4 April 1974), 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.