| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 3397 | 86.79% | 30.95% |
| John Pinkerton | Dem | 517 | 13.21% | 4.71% |
| John M Brown | Rep | 87 | 1.29% | 0.79% |
| Linh Dao | Rep | 35 | 0.52% | 0.32% |
| Matt Fong | Rep | 3097 | 45.77% | 28.22% |
| Darrell Issa | Rep | 2870 | 42.42% | 26.15% |
| Mark Raus | Rep | 125 | 1.85% | 1.14% |
| Frank D Riggs | Rep | 552 | 8.16% | 5.03% |
| H Joseph Perrin, Sr | AI | 69 | 100.00% | 0.63% |
| Ted Brown | Lib | 104 | 100.00% | 0.95% |
| Brian M Rees | NL | 39 | 100.00% | 0.36% |
| Ophie C Beltran | P&F | 39 | 100.00% | 0.36% |
| Timothy R Erich | Rfm | 44 | 100.00% | 0.40% |
| Votes not Cast in Race | NA | 454 | NA | 3.97% |
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