International Race of Champions (IROC) was a North American auto racing competition, created by Les Richter, Roger Penske and Mike Phelps, promoted as an American-motorsports equivalent of an all-star game.

Despite its name, IROC was primarily associated with North American oval track racing.

In March 2008, IROC auctioned off its tools, equipment, cars, and memorabilia, and went out of business.

[2] On January 8, 2024, Ray Evernham alongside Rob Kauffman announced the series would relaunch in 2024 with the intent of one race while exploring future opportunities afterwards.

Criteria for invitation was very loose, but typically consisted of recent season champions of the respective series, and individual winners of big events (Indy, Daytona, etc.)

It was occasionally rumored that a top NHRA drag racer would be invited and compete, but none ever did.

Through 2003, IROC was also known for its rainbow of car colors being easily recognized from all other racing series.

Car numbers were utilized for scoring purposes, but were not the primary means of identification.

[3] In 2004, the alcoholic beverage company, Diageo became the series' title sponsor, utilising their Crown Royal brand whiskey, replacing True Value, and the procedure changed as well.

Cars would be identically painted in white, with trim which could be changed to represent the driver's colors in his regular racing series.

During the hiatus of motorsports due to the COVID-19 pandemic in 2020, a group of drivers from NASCAR, NHRA, IndyCar, IMSA, Supercross, Supercars Championship, Formula One, and Rallycross competed in iRacing in dirt modifieds, GTE cars, and stock cars in an event dubbed a "tribute to IROC".

[4] In 2021, final IROC champion Tony Stewart and Ray Evernham launched Superstar Racing Experience (SRX) based on the IROC concept of identical cars and an all-star cast of drivers from different racing series.