The 2005 Tour de France was the 92nd edition of the Tour de France, one of cycling's Grand Tours. It took place between 2–24 July, with 21 stages covering a distance 3,593 km (2,233 mi). It has no overall winner—although American cyclist Lance Armstrong originally won the event, the United States Anti-Doping Agency announced on 24 August 2012 that they had disqualified Armstrong from all his results since 1 August 1998, including his seven Tour de France wins from 1999 to 2005. The verdict was subsequently confirmed by the UCI.

The Tour de France is an annual men's multiple-stage bicycle race held primarily in France. It is the oldest of the three Grand Tours and is generally considered the most prestigious.