| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 9563 | 81.07% | 24.00% |
| John Pinkerton | Dem | 2233 | 18.93% | 5.60% |
| John M Brown | Rep | 313 | 1.18% | 0.79% |
| Linh Dao | Rep | 167 | 0.63% | 0.42% |
| Matt Fong | Rep | 11954 | 45.10% | 30.00% |
| Darrell Issa | Rep | 10878 | 41.04% | 27.30% |
| Mark Raus | Rep | 533 | 2.01% | 1.34% |
| Frank D Riggs | Rep | 2661 | 10.04% | 6.68% |
| H Joseph Perrin, Sr | AI | 311 | 100.00% | 0.78% |
| Ted Brown | Lib | 585 | 100.00% | 1.47% |
| Brian M Rees | NL | 169 | 100.00% | 0.42% |
| Ophie C Beltran | P&F | 178 | 100.00% | 0.45% |
| Timothy R Erich | Rfm | 301 | 100.00% | 0.76% |
| Votes not Cast in Race | NA | 1970 | NA | 4.71% |
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