| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 10383 | 90.81% | 45.90% |
| John Pinkerton | Dem | 1051 | 9.19% | 4.65% |
| John M Brown | Rep | 227 | 2.34% | 1.00% |
| Linh Dao | Rep | 170 | 1.75% | 0.75% |
| Matt Fong | Rep | 4307 | 44.36% | 19.04% |
| Darrell Issa | Rep | 1373 | 14.14% | 6.07% |
| Mark Raus | Rep | 208 | 2.14% | 0.92% |
| Frank D Riggs | Rep | 3424 | 35.27% | 15.14% |
| H Joseph Perrin, Sr | AI | 152 | 100.00% | 0.67% |
| Ted Brown | Lib | 448 | 100.00% | 1.98% |
| Brian M Rees | NL | 144 | 100.00% | 0.64% |
| Ophie C Beltran | P&F | 505 | 100.00% | 2.23% |
| Timothy R Erich | Rfm | 228 | 100.00% | 1.01% |
| Votes not Cast in Race | NA | 1381 | NA | 5.75% |
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