| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 5971 | 86.84% | 34.12% |
| John Pinkerton | Dem | 905 | 13.16% | 5.17% |
| John M Brown | Rep | 154 | 1.54% | 0.88% |
| Linh Dao | Rep | 62 | 0.62% | 0.35% |
| Matt Fong | Rep | 3967 | 39.72% | 22.67% |
| Darrell Issa | Rep | 4404 | 44.10% | 25.17% |
| Mark Raus | Rep | 202 | 2.02% | 1.15% |
| Frank D Riggs | Rep | 1198 | 12.00% | 6.85% |
| H Joseph Perrin, Sr | AI | 101 | 100.00% | 0.58% |
| Ted Brown | Lib | 165 | 100.00% | 0.94% |
| Brian M Rees | NL | 53 | 100.00% | 0.30% |
| Ophie C Beltran | P&F | 157 | 100.00% | 0.90% |
| Timothy R Erich | Rfm | 160 | 100.00% | 0.91% |
| Votes not Cast in Race | NA | 587 | NA | 3.25% |
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