The 2024 Southern Illinois 100 was the 16th stock car race of the 2024 ARCA Menards Series season, and the 44th iteration of the event. The race was held on Sunday, September 1, 2024, at the DuQuoin State Fairgrounds Racetrack in Du Quoin, Illinois, a 1-mile (1.6 km) permanent oval-shaped dirt track. The race took the scheduled 100 laps to complete. Brent Crews, driving for Venturini Motorsports, would hold off pole winner William Sawalich. To fill out the podium, Sawalich, driving for Joe Gibbs Racing and Andrés Pérez de Lara, driving for Rev Racing, would finish 2nd and 3rd, respectively.