| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 4547 | 88.88% | 41.78% |
| John Pinkerton | Dem | 569 | 11.12% | 5.23% |
| John M Brown | Rep | 125 | 2.39% | 1.15% |
| Linh Dao | Rep | 46 | 0.88% | 0.42% |
| Matt Fong | Rep | 2323 | 44.35% | 21.35% |
| Darrell Issa | Rep | 2089 | 39.88% | 19.20% |
| Mark Raus | Rep | 107 | 2.04% | 0.98% |
| Frank D Riggs | Rep | 548 | 10.46% | 5.04% |
| H Joseph Perrin, Sr | AI | 68 | 100.00% | 0.62% |
| Ted Brown | Lib | 165 | 100.00% | 1.52% |
| Brian M Rees | NL | 39 | 100.00% | 0.36% |
| Ophie C Beltran | P&F | 168 | 100.00% | 1.54% |
| Timothy R Erich | Rfm | 88 | 100.00% | 0.81% |
| Votes not Cast in Race | NA | 401 | NA | 3.55% |
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