The 2013 STP 300 was the 18th stock car race of the 2013 NASCAR Nationwide Series and the 24th iteration of the event. The race was held on Sunday, July 21, 2013, in Joliet, Illinois, at Chicagoland Speedway, a 1.5 miles (2.41 km) tri-oval speedway. The race took the scheduled 200 laps to complete. At race's end, Joey Logano, driving for Penske Racing, would be able to take away the lead from teammate and eventual-second-place finisher Sam Hornish Jr. to win his 20th career NASCAR Nationwide Series win and his second of the season. To fill out the podium, Austin Dillon of Richard Childress Racing finished third.