| Candidate | Party | County total | Percent, party | Percent, total |
| Diane Feinstein | Dem-Inc | 44470 | 97.9% | 58.2% |
| Michael Schmier | Dem | 987 | 2.1% | 1.3% |
| Ray Haynes | Rep | 1941 | 7.8% | 2.6% |
| John M. Brown | Rep | 433 | 1.7% | 0.6% |
| Linh Dao | Rep | 185 | 0.7% | 0.2% |
| Tom Campbell | Rep | 20551 | 82.0% | 26.9% |
| Bill Horn | Rep | 1757 | 7.0% | 2.3% |
| James Peter Gough | Rep | 219 | 0.8% | 0.2% |
| Diane Beall Templin | AI | 343 | 100.0% | 0.4% |
| Jan B. Tucker | Grn | 948 | 27.5% | 1.3% |
| Medea Susan Benjamin | Grn | 2490 | 72.5% | 3.3% |
| Gail Katherine Lightfoot | Lib | 1351 | 100.0% | 1.8% |
| Brian M. Rees | NL | 307 | 100.0% | 0.4% |
| Jose Luis Camahort | Ref | 332 | 68.6% | 0.4% |
| Valli Sharpe-Geisler | Ref | 152 | 31.4% | 0.1% |
| Votes not Cast in Race | NA | 3288 | NA | 4.12% |
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Election: U.S. Senate
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