| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 944 | 81.94% | 25.00% |
| John Pinkerton | Dem | 208 | 18.06% | 5.51% |
| John M Brown | Rep | 29 | 1.15% | 0.77% |
| Linh Dao | Rep | 11 | 0.44% | 0.29% |
| Matt Fong | Rep | 1107 | 43.91% | 29.32% |
| Darrell Issa | Rep | 1121 | 44.47% | 29.69% |
| Mark Raus | Rep | 50 | 1.98% | 1.32% |
| Frank D Riggs | Rep | 203 | 8.05% | 5.38% |
| H Joseph Perrin, Sr | AI | 11 | 100.00% | 0.29% |
| Ted Brown | Lib | 37 | 100.00% | 0.98% |
| Brian M Rees | NL | 13 | 100.00% | 0.34% |
| Ophie C Beltran | P&F | 18 | 100.00% | 0.48% |
| Timothy R Erich | Rfm | 24 | 100.00% | 0.64% |
| Votes not Cast in Race | NA | 160 | NA | 4.07% |
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