| Candidate | Party | County total | Percent, party | Percent, total |
| Diane Feinstein | Dem-Inc | 25979 | 96.6% | 57.4% |
| Michael Schmier | Dem | 1000 | 3.7% | 2.3% |
| Ray Haynes | Rep | 3170 | 20.5% | 7.0% |
| John M. Brown | Rep | 349 | 2.2% | 0.7% |
| Linh Dao | Rep | 413 | 2.6% | 0.9% |
| Tom Campbell | Rep | 8570 | 55.4% | 19.0% |
| Bill Horn | Rep | 2436 | 15.8% | 5.4% |
| James Peter Gough | Rep | 545 | 3.5% | 1.2% |
| Diane Beall Templin | AI | 309 | 100.0% | 0.6% |
| Jan B. Tucker | Grn | 337 | 28.2% | 0.7% |
| Medea Susan Benjamin | Grn | 856 | 71.8% | 1.9% |
| Gail Katherine Lightfoot | Lib | 805 | 100.0% | 1.8% |
| Brian M. Rees | NL | 164 | 100.0% | 0.3% |
| Jose Luis Camahort | Ref | 273 | 69.3% | 0.6% |
| Valli Sharpe-Geisler | Ref | 121 | 30.7% | 0.2% |
| Votes not Cast in Race | NA | 3055 | NA | 6.31% |
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Election: U.S. Senate
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