| Candidate | Party | County total | Percent, party | Percent, total |
| Diane Feinstein | Dem-Inc | 6052 | 96.6% | 50.7% |
| Michael Schmier | Dem | 219 | 3.4% | 1.9% |
| Ray Haynes | Rep | 470 | 9.2% | 4.0% |
| John M. Brown | Rep | 126 | 2.5% | 1.1% |
| Linh Dao | Rep | 25 | 0.4% | 0.2% |
| Tom Campbell | Rep | 3752 | 72.9% | 31.4% |
| Bill Horn | Rep | 730 | 14.2% | 6.2% |
| James Peter Gough | Rep | 46 | 0.8% | 0.3% |
| Diane Beall Templin | AI | 71 | 100.0% | 0.5% |
| Jan B. Tucker | Grn | 44 | 31.4% | 0.3% |
| Medea Susan Benjamin | Grn | 96 | 68.6% | 0.8% |
| Gail Katherine Lightfoot | Lib | 185 | 100.0% | 1.6% |
| Brian M. Rees | NL | 34 | 100.0% | 0.2% |
| Jose Luis Camahort | Ref | 78 | 73.6% | 0.6% |
| Valli Sharpe-Geisler | Ref | 28 | 26.4% | 0.2% |
| Votes not Cast in Race | NA | 506 | NA | 4.06% |
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Election: U.S. Senate
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