| Candidate | Party | County total | Percent, party | Percent, total |
| Diane Feinstein | Dem-Inc | 9185 | 95.2% | 45.2% |
| Michael Schmier | Dem | 470 | 4.8% | 2.4% |
| Ray Haynes | Rep | 1385 | 13.8% | 6.9% |
| John M. Brown | Rep | 198 | 2.0% | 1.0% |
| Linh Dao | Rep | 90 | 0.8% | 0.4% |
| Tom Campbell | Rep | 6279 | 62.4% | 30.9% |
| Bill Horn | Rep | 2036 | 20.3% | 10.1% |
| James Peter Gough | Rep | 77 | 0.7% | 0.3% |
| Diane Beall Templin | AI | 87 | 100.0% | 0.4% |
| Jan B. Tucker | Grn | 48 | 44.8% | 0.2% |
| Medea Susan Benjamin | Grn | 59 | 55.2% | 0.2% |
| Gail Katherine Lightfoot | Lib | 240 | 100.0% | 1.2% |
| Brian M. Rees | NL | 35 | 100.0% | 0.1% |
| Jose Luis Camahort | Ref | 115 | 82.8% | 0.6% |
| Valli Sharpe-Geisler | Ref | 24 | 17.2% | 0.1% |
| Votes not Cast in Race | NA | 3832 | NA | 15.86% |
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Election: U.S. Senate
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