| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 1582 | 85.28% | 28.66% |
| John Pinkerton | Dem | 273 | 14.72% | 4.95% |
| John M Brown | Rep | 166 | 4.83% | 3.01% |
| Linh Dao | Rep | 23 | 0.67% | 0.42% |
| Matt Fong | Rep | 1052 | 30.61% | 19.06% |
| Darrell Issa | Rep | 1550 | 45.10% | 28.08% |
| Mark Raus | Rep | 76 | 2.21% | 1.38% |
| Frank D Riggs | Rep | 570 | 16.58% | 10.33% |
| H Joseph Perrin, Sr | AI | 31 | 100.00% | 0.56% |
| Ted Brown | Lib | 72 | 100.00% | 1.30% |
| Brian M Rees | NL | 31 | 100.00% | 0.56% |
| Ophie C Beltran | P&F | 36 | 100.00% | 0.65% |
| Timothy R Erich | Rfm | 58 | 100.00% | 1.05% |
| Votes not Cast in Race | NA | 225 | NA | 3.92% |
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