| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 1211 | 78.69% | 28.20% |
| John Pinkerton | Dem | 328 | 21.31% | 7.64% |
| John M Brown | Rep | 45 | 1.85% | 1.05% |
| Linh Dao | Rep | 22 | 0.90% | 0.51% |
| Matt Fong | Rep | 976 | 40.12% | 22.72% |
| Darrell Issa | Rep | 718 | 29.51% | 16.72% |
| Mark Raus | Rep | 58 | 2.38% | 1.35% |
| Frank D Riggs | Rep | 614 | 25.24% | 14.30% |
| H Joseph Perrin, Sr | AI | 60 | 100.00% | 1.40% |
| Ted Brown | Lib | 134 | 100.00% | 3.12% |
| Brian M Rees | NL | 51 | 100.00% | 1.19% |
| Ophie C Beltran | P&F | 31 | 100.00% | 0.72% |
| Timothy R Erich | Rfm | 47 | 100.00% | 1.09% |
| Votes not Cast in Race | NA | 152 | NA | 3.42% |
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