2025 IMSA SportsCar Championship
The No. 6 Porsche Penske Motorsport won the GTP Teams' Championship, with Porsche also winning the GTP Manufacturers' Championship. The No. 99 AO Racing won the LMP2 Teams' Championship. The No. 3 Corvette Racing by Pratt Miller Motorsports won the GTD Pro Teams' Championship, with Chevrolet winning the GTD Pro Manufacturers' Championship. The No. 57 Winward Racing won the GTD Teams' Championship, with Mercedes-AMG winning the GTD Manufacturers' Championship.
The 2025 IMSA SportsCar Championship (known for sponsorship reasons as the 2025 IMSA WeatherTech SportsCar Championship) was a motor racing championship and the 55th racing season sanctioned by the International Motor Sports Association, which traced its lineage back to the 1971 IMSA GT Championship. It was also the twelfth 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 tenth under the sponsorship of WeatherTech.