| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 12626 | 88.38% | 29.54% |
| John Pinkerton | Dem | 1660 | 11.62% | 3.88% |
| John M Brown | Rep | 397 | 1.47% | 0.93% |
| Linh Dao | Rep | 176 | 0.65% | 0.41% |
| Matt Fong | Rep | 11528 | 42.78% | 26.97% |
| Darrell Issa | Rep | 11552 | 42.87% | 27.02% |
| Mark Raus | Rep | 667 | 2.48% | 1.56% |
| Frank D Riggs | Rep | 2627 | 9.75% | 6.15% |
| H Joseph Perrin, Sr | AI | 263 | 100.00% | 0.62% |
| Ted Brown | Lib | 564 | 100.00% | 1.32% |
| Brian M Rees | NL | 179 | 100.00% | 0.42% |
| Ophie C Beltran | P&F | 186 | 100.00% | 0.44% |
| Timothy R Erich | Rfm | 321 | 100.00% | 0.75% |
| Votes not Cast in Race | NA | 1302 | NA | 2.96% |
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