| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 16061 | 92.64% | 46.46% |
| John Pinkerton | Dem | 1276 | 7.36% | 3.69% |
| John M Brown | Rep | 298 | 1.85% | 0.86% |
| Linh Dao | Rep | 58 | 0.36% | 0.17% |
| Matt Fong | Rep | 8029 | 49.76% | 23.23% |
| Darrell Issa | Rep | 3047 | 18.89% | 8.82% |
| Mark Raus | Rep | 227 | 1.41% | 0.66% |
| Frank D Riggs | Rep | 4475 | 27.74% | 12.95% |
| H Joseph Perrin, Sr | AI | 162 | 100.00% | 0.47% |
| Ted Brown | Lib | 382 | 100.00% | 1.11% |
| Brian M Rees | NL | 116 | 100.00% | 0.34% |
| Ophie C Beltran | P&F | 186 | 100.00% | 0.54% |
| Timothy R Erich | Rfm | 249 | 100.00% | 0.72% |
| Votes not Cast in Race | NA | 1110 | NA | 3.11% |
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