The 2020 Indianapolis 8 Hours was an endurance race that was staged on the Indianapolis Motor Speedway in Speedway, in Indiana, U.S.A. on 4 October 2020. The event was open to cars in GT classes, namely GT3 and GT4. It was the inaugural running of the , replacing the previous American leg of the Intercontinental GT Challenge, the California 8 Hours held at WeatherTech Raceway Laguna Seca. It was the second leg of the 2020 Intercontinental GT Challenge and the sixth and final round of the 2020 GT World Challenge America. The GT World Challenge America results would be determined by the race results after three hours instead of the full eight hours.