| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 410 | 77.07% | 25.59% |
| John Pinkerton | Dem | 122 | 22.93% | 7.62% |
| John M Brown | Rep | 16 | 1.68% | 1.00% |
| Linh Dao | Rep | 4 | 0.42% | 0.25% |
| Matt Fong | Rep | 430 | 45.26% | 26.84% |
| Darrell Issa | Rep | 294 | 30.95% | 18.35% |
| Mark Raus | Rep | 37 | 3.89% | 2.31% |
| Frank D Riggs | Rep | 169 | 17.79% | 10.55% |
| H Joseph Perrin, Sr | AI | 22 | 100.00% | 1.37% |
| Ted Brown | Lib | 52 | 100.00% | 3.25% |
| Brian M Rees | NL | 15 | 100.00% | 0.94% |
| Ophie C Beltran | P&F | 16 | 100.00% | 1.00% |
| Timothy R Erich | Rfm | 15 | 100.00% | 0.94% |
| Votes not Cast in Race | NA | 109 | NA | 6.37% |
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