The 1989 Heinz Southern 500 was the 21st stock car race of the 1989 NASCAR Winston Cup Series season and the 40th iteration of the event. The race was held on Sunday, September 2, 1990, before an audience of 80,000 in Darlington, South Carolina, at Darlington Raceway, a permanent egg-shaped oval racetrack. The race took the scheduled 367 laps to complete. At race's end, Richard Childress Racing driver Dale Earnhardt would dominate the late stages of the race, leading the final 63 laps of the race to take his 37th career NASCAR Winston Cup Series victory and his third victory of the season. To fill out the top three, Roush Racing driver Mark Martin and King Racing driver Ricky Rudd would finish second and third, respectively.
