| Race details | |
|---|---|
| Race 9 of 12 in the 1980 CART PPG Indy Car World Series season | |
 | |
| Date | August 31, 1980 |
| Official name | 1980 California 500 |
| Location | Ontario Motor Speedway, Ontario, California, United States |
| Course | Permanent racing facility 2.500 mi / 4.023 km |
| Distance | 200 laps 500.000 mi / 804.672 km |
| Pole position | |
| Driver |  Bobby Unser (Team Penske) |
| Time | 195.200 mph (314.144 km/h) |
| Podium | |
| First | Bobby Unser (Team Penske) |
| Second | Johnny Rutherford (Jim Hall/Chaparral) |
| Third | Rick Mears (Team Penske) |
The 1980 California 500, the eleventh running of the event, was held at the Ontario Motor Speedway in Ontario, California, on Sunday, August 31, 1980. The event was race number 9 of 12 in the 1980 CART PPG Indy Car World Series. The race was won by Bobby Unser, his fourth California 500 victory. The race was the final California 500 before Ontario Motor Speedway closed at the end of the year.