Silver Medal U-23 Men's Road Race 2005 UCI Road World Championships William Walker (born 31 October 1985 in Subiaco, Western Australia) is a retired Australian professional road racing cyclist and Australian Champion who rode for the Dutch team Rabobank between 2005 and 2008 and Spanish team Fuji–Servetto in 2009.

Walker was described as having a motor on par with Lance Armstrong,[1] with a reported recorded VO2 max 94.

[3] Walker finished second to Dmytro Grabovskyy in the Under 23 World Road Championship in Madrid in 2005.

Walker represented Australia in the 2003, 2005, 2007 and 2008 World Road Championships as well as the 2006 Commonwealth Games in Melbourne.

[4] Walker moved to the Azerbaijan-based Synergy Baku Cycling Project for the 2014 season.