The Camping World 400 was a NASCAR Cup Series stock car race held annually at Chicagoland Speedway in Joliet, Illinois, from 2001 to 2019. Previously, the race was held in July from 2001 through 2010, with night races held from 2008 to 2010. From 2011 to 2017, the races were held as the first race of the Cup Series playoffs in the round of 16. In 2018, as part of the schedule realignment, the race was held on the last weekend of June.

Chicagoland Speedway is a 1.520 mi (2.446 km) tri-oval speedway with a curved backstretch in Joliet, Illinois, southwest of Chicago. The speedway opened in 2001 and actively hosted NASCAR racing including the NASCAR Cup Series until 2019. Until 2010, the speedway has also hosted the IndyCar Series, recording numerous close finishes including the closest finish in IndyCar history. The speedway is owned and operated by NASCAR.