| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 1769 | 85.25% | 29.31% |
| John Pinkerton | Dem | 306 | 14.75% | 5.07% |
| John M Brown | Rep | 75 | 2.02% | 1.24% |
| Linh Dao | Rep | 37 | 1.00% | 0.61% |
| Matt Fong | Rep | 1385 | 37.25% | 22.95% |
| Darrell Issa | Rep | 1685 | 45.32% | 27.92% |
| Mark Raus | Rep | 63 | 1.69% | 1.04% |
| Frank D Riggs | Rep | 473 | 12.72% | 7.84% |
| H Joseph Perrin, Sr | AI | 38 | 100.00% | 0.63% |
| Ted Brown | Lib | 99 | 100.00% | 1.64% |
| Brian M Rees | NL | 28 | 100.00% | 0.46% |
| Ophie C Beltran | P&F | 33 | 100.00% | 0.55% |
| Timothy R Erich | Rfm | 45 | 100.00% | 0.75% |
| Votes not Cast in Race | NA | 220 | NA | 3.52% |
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