Harry Jefferson NASCAR Cup Series results at Ontario
Back to Harry Jefferson career stats
| Year | Race # | Start | Finish | Car # | Sponsor | Engine | Owner | Crew Chief | Qualifying Speed | Laps | X Led | Laps Led | Status | Money | Points |
| 1974 | 30 | 13 | 34 | 97 | '72 Ford | 37 | 0 | 0 | clutch | 900 | 0 | ||||
| 1977 | 30 | 34 | 18 | 95 | Jefferson Racing | Ford | Harry Jefferson | 195 | 0 | 0 | running | 1600 | 109 |
