| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 3288 | 79.13% | 27.96% |
| John Pinkerton | Dem | 867 | 20.87% | 7.37% |
| John M Brown | Rep | 131 | 1.83% | 1.11% |
| Linh Dao | Rep | 63 | 0.88% | 0.54% |
| Matt Fong | Rep | 3082 | 43.15% | 26.21% |
| Darrell Issa | Rep | 3037 | 42.52% | 25.82% |
| Mark Raus | Rep | 214 | 3.00% | 1.82% |
| Frank D Riggs | Rep | 615 | 8.61% | 5.23% |
| H Joseph Perrin, Sr | AI | 96 | 100.00% | 0.82% |
| Ted Brown | Lib | 157 | 100.00% | 1.34% |
| Brian M Rees | NL | 50 | 100.00% | 0.43% |
| Ophie C Beltran | P&F | 56 | 100.00% | 0.48% |
| Timothy R Erich | Rfm | 104 | 100.00% | 0.88% |
| Votes not Cast in Race | NA | 430 | NA | 3.53% |
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