The 1980 San Diego Chargers season was the franchise's 11th season in the National Football League (NFL), and its 21st overall. The team failed to improve on their 12–4 record in 1979 and finished 11–5, though they won the AFC West and gained the top seed in the AFC playoffs for the second consecutive season. Their season ended in the AFC Championship game when they lost to their divisional rivals the Oakland Raiders.