The Hollywood Casino 400 is a 400.5-mile (644.5 km) NASCAR Cup Series stock car race held at Kansas Speedway in Kansas City, Kansas. This race is the second of ten races in the Cup Series playoffs; since 2022, it is the second race of the Round of 16.

Kansas Speedway is a 1.500-mile (2.414 km) tri-oval intermediate speedway in Kansas City, Kansas. The track, since its inaugural season of racing in 2001, has hosted a variety of racing series, including NASCAR, IndyCar, and the IMSA SportsCar Championship. The track has been owned by NASCAR since 2019, with Patrick Warren serving as the track's president. The track is served by the concurrent Interstate 70, U.S. Route 24, and U.S. Route 40, along with Interstate 435.