| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 1444 | 76.48% | 20.34% |
| John Pinkerton | Dem | 444 | 23.52% | 6.25% |
| John M Brown | Rep | 70 | 1.41% | 0.99% |
| Linh Dao | Rep | 31 | 0.62% | 0.44% |
| Matt Fong | Rep | 2288 | 45.94% | 32.23% |
| Darrell Issa | Rep | 2176 | 43.69% | 30.65% |
| Mark Raus | Rep | 88 | 1.77% | 1.24% |
| Frank D Riggs | Rep | 327 | 6.57% | 4.61% |
| H Joseph Perrin, Sr | AI | 43 | 100.00% | 0.61% |
| Ted Brown | Lib | 85 | 100.00% | 1.20% |
| Brian M Rees | NL | 32 | 100.00% | 0.45% |
| Ophie C Beltran | P&F | 26 | 100.00% | 0.37% |
| Timothy R Erich | Rfm | 45 | 100.00% | 0.63% |
| Votes not Cast in Race | NA | 317 | NA | 4.27% |
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