The 2004 Tour de France was a multiple stage bicycle race held from 3 to 25 July, and the 91st edition of the Tour de France. It has no overall winner—although American cyclist Lance Armstrong originally won the event, the United States Anti-Doping Agency announced in August 2012 that they had disqualified Armstrong from all his results since 1998, including his seven Tour de France wins from 1999 to 2005; the Union Cycliste Internationale confirmed the result.

Iban Mayo Diez is a former professional road bicycle racer.