The 2024 IMSA SportsCar Championship (known for sponsorship reasons as the 2024 IMSA WeatherTech SportsCar Championship) was a motor racing championship, which was the 54th racing season sanctioned by the International Motor Sports Association and traces its lineage back to the 1971 IMSA GT Championship. It was also the eleventh season of the IMSA SportsCar Championship since the merger between the American Le Mans Series and the Rolex Sports Car Series in 2014, and the ninth under the sponsorship of WeatherTech. Following a change in class structure for the 2024 season, the IMSA SportsCar Championship saw a major expansion of its full-time grid across all of its classes.