The 2005 United States Grand Prix was a Formula One motor race held on June 19, 2005, at the Indianapolis Motor Speedway and was the ninth race of the 2005 Formula One World Championship. The event is one of the most infamous races in motorsport history. Out of the 20 cars that entered the race, only the six cars from the teams using Bridgestone tyres (Ferrari, Jordan, and Minardi) competed. The remaining fourteen entrants, all using Michelin tyres, completed the formation lap, but retired to the pit lane before the race started.

Following two tyre failures before the race, which caused major accidents for Ralf Schumacher's Toyota during Friday practice and then for his Toyota stand-in Ricardo Zonta, Michelin advised its seven customer teams that without a reduction in speed in Turn 13, the tyres provided for the race would only be safe for 10 laps. Michelin had been providing working tyres for the race since 2001. The situation was worsened by the 2005 Formula One rules, which forbade tyre changes during the race, and a repave of the oval portion of the course after the 2004 Brickyard 400.

The Fédération Internationale de l'Automobile refused a compromise proposal from Michelin to allow a chicane to be installed, maintaining that such rule changes would be grossly unfair to the Bridgestone-shod teams, who had come prepared with properly working tyres, and that a last-minute change to the track layout would be dangerous in case of crashes. The Michelin teams, unable to come to a compromise with the FIA, decided not to participate. It was later stated that the Michelin-shod teams could have potentially exposed themselves to criminal liability under Indiana state law had they competed. It was also thought that since Bridgestone also provided tyres to the two Indy Racing League series via its Firestone brand, and had encountered issues during testing that caused them to return with different IndyCar tyres, it understood better the loads the Formula One tyres would be under. Thus, Bridgestone was able to provide a safe tyre.

Of the six competitors, Ferrari's Michael Schumacher was the eventual winner, with his teammate Rubens Barrichello finishing second and Jordan driver Tiago Monteiro finishing third, which would be his only podium in Formula One as well as the last podium for Jordan. The result moved Schumacher to third in the World Drivers' Championship. The final race result was the lowest number of finishing entries ever seen in a major open-wheel motorsports event at the Indianapolis Motor Speedway since the institution of the 500-Mile Race. The situation created enormous negative publicity for the sport of Formula One, especially in the United States, a market in which Formula One had struggled to establish itself over the preceding twenty years.