The 1980 NASCAR Winston Cup Series was the 32nd season of professional stock car racing in the United States and the 9th modern-era NASCAR Cup season. It was the final year with the Gen 2 car. The season began on Sunday, January 13 and ended on Sunday, November 15. Dale Earnhardt won his first Winston Cup championship, winning by 19 points over Cale Yarborough. Jody Ridley was crowned NASCAR Rookie of the Year.

William Caleb "Cale" Yarborough was an American NASCAR Winston Cup Series driver and owner, businessman, farmer, and rancher. He was one of only two drivers in NASCAR history to win three consecutive championships, winning in 1976, 1977, and 1978. He was one of the preeminent stock car drivers from the 1960s to the 1980s and also competed in IndyCar events. His fame was such that a special model of the Mercury Cyclone Spoiler II was named after him.