| Candidate | Party | County total | Percent, party | Percent, total |
| Diane Feinstein | Dem-Inc | 1628 | 91.3% | 36.2% |
| Michael Schmier | Dem | 156 | 8.7% | 3.5% |
| Ray Haynes | Rep | 490 | 19.2% | 10.9% |
| John M. Brown | Rep | 43 | 1.7% | 1.0% |
| Linh Dao | Rep | 15 | 0.5% | 0.3% |
| Tom Campbell | Rep | 1310 | 51.2% | 29.1% |
| Bill Horn | Rep | 675 | 26.4% | 15.0% |
| James Peter Gough | Rep | 26 | 1.0% | 0.6% |
| Diane Beall Templin | AI | 21 | 100.0% | 0.4% |
| Jan B. Tucker | Grn | 11 | 42.3% | 0.2% |
| Medea Susan Benjamin | Grn | 15 | 57.70% | 0.3% |
| Gail Katherine Lightfoot | Lib | 60 | 100.0% | 1.4% |
| Brian M. Rees | NL | 12 | 100.0% | 0.2% |
| Jose Luis Camahort | Ref | 36 | 83.8% | 0.8% |
| Valli Sharpe-Geisler | Ref | 7 | 16.2% | 0.1% |
| Votes not Cast in Race | NA | 210 | NA | 4.45% |
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Election: U.S. Senate
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