| Candidate | Party | County total | Percent, party | Percent, total |
| Diane Feinstein | Dem-Inc | 9214 | 93.7% | 37.5% |
| Michael Schmier | Dem | 627 | 6.3% | 2.6% |
| Ray Haynes | Rep | 2895 | 21.1% | 11.8% |
| John M. Brown | Rep | 370 | 2.7% | 1.5% |
| Linh Dao | Rep | 249 | 1.8% | 1.0% |
| Tom Campbell | Rep | 6617 | 48.4% | 26.9% |
| Bill Horn | Rep | 3278 | 24.0% | 13.4% |
| James Peter Gough | Rep | 280 | 2.0% | 1.1% |
| Diane Beall Templin | AI | 149 | 100.0% | 0.6% |
| Jan B. Tucker | Grn | 84 | 35.0% | 0.3% |
| Medea Susan Benjamin | Grn | 156 | 65.0% | 0.6% |
| Gail Katherine Lightfoot | Lib | 440 | 100.0% | 1.7% |
| Brian M. Rees | NL | 72 | 100.0% | 0.2% |
| Jose Luis Camahort | Ref | 152 | 74.9% | 0.6% |
| Valli Sharpe-Geisler | Ref | 51 | 25.1% | 0.2% |
| Votes not Cast in Race | NA | 1409 | NA | 5.41% |
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Election: U.S. Senate
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