| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 4043 | 81.84% | 30.67% |
| John Pinkerton | Dem | 897 | 18.16% | 6.80% |
| John M Brown | Rep | 163 | 2.15% | 1.24% |
| Linh Dao | Rep | 62 | 0.82% | 0.47% |
| Matt Fong | Rep | 4236 | 55.77% | 32.13% |
| Darrell Issa | Rep | 1552 | 20.43% | 11.77% |
| Mark Raus | Rep | 274 | 3.61% | 2.08% |
| Frank D Riggs | Rep | 1309 | 17.23% | 9.93% |
| H Joseph Perrin, Sr | AI | 118 | 100.00% | 0.90% |
| Ted Brown | Lib | 276 | 100.00% | 2.09% |
| Brian M Rees | NL | 83 | 100.00% | 0.63% |
| Ophie C Beltran | P&F | 71 | 100.00% | 0.54% |
| Timothy R Erich | Rfm | 100 | 100.00% | 0.76% |
| Votes not Cast in Race | NA | 557 | NA | 4.05% |
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