| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 32757 | 89.94% | 46.32% |
| John Pinkerton | Dem | 3665 | 10.06% | 5.18% |
| John M Brown | Rep | 795 | 2.50% | 1.12% |
| Linh Dao | Rep | 216 | 0.68% | 0.31% |
| Matt Fong | Rep | 14008 | 44.03% | 19.81% |
| Darrell Issa | Rep | 8862 | 27.85% | 12.53% |
| Mark Raus | Rep | 453 | 1.42% | 0.64% |
| Frank D Riggs | Rep | 7481 | 23.51% | 10.58% |
| H Joseph Perrin, Sr | AI | 314 | 100.00% | 0.44% |
| Ted Brown | Lib | 700 | 100.00% | 0.99% |
| Brian M Rees | NL | 251 | 100.00% | 0.35% |
| Ophie C Beltran | P&F | 433 | 100.00% | 0.61% |
| Timothy R Erich | Rfm | 786 | 100.00% | 1.11% |
| Votes not Cast in Race | NA | 3457 | NA | 4.66% |
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