Elections / 2018 · Senate · CA
California — 2018 U.S. Senate election
Recent presidential results
Akashicstate2018 Senate electionCalifornia · U.S. SenateFeinsteinD+100.0
How it voted
Share of the 2018 vote
| Dianne Feinstein (i) ✓Democrat | 54.2% | 6,019,422 |
|---|---|---|
| Kevin De LeonDemocrat | 45.8% | 5,093,942 |
2018Senate margin
D+60R+60
58 counties, each filled by 2018 D-vs-R margin. Hover any county for its result.
County-level results (58 counties) — table
| County | Winner | Margin |
|---|---|---|
| ALAMEDA, CA | Democratic | D+100.0 |
| ALPINE, CA | Democratic | D+100.0 |
| AMADOR, CA | Democratic | D+100.0 |
| BUTTE, CA | Democratic | D+100.0 |
| CALAVERAS, CA | Democratic | D+100.0 |
| COLUSA, CA | Democratic | D+100.0 |
| CONTRA COSTA, CA | Democratic | D+100.0 |
| DEL NORTE, CA | Democratic | D+100.0 |
| EL DORADO, CA | Democratic | D+100.0 |
| FRESNO, CA | Democratic | D+100.0 |
| GLENN, CA | Democratic | D+100.0 |
| HUMBOLDT, CA | Democratic | D+100.0 |
| IMPERIAL, CA | Democratic | D+100.0 |
| INYO, CA | Democratic | D+100.0 |
| KERN, CA | Democratic | D+100.0 |
| KINGS, CA | Democratic | D+100.0 |
| LAKE, CA | Democratic | D+100.0 |
| LASSEN, CA | Democratic | D+100.0 |
| LOS ANGELES, CA | Democratic | D+100.0 |
| MADERA, CA | Democratic | D+100.0 |
| MARIN, CA | Democratic | D+100.0 |
| MARIPOSA, CA | Democratic | D+100.0 |
| MENDOCINO, CA | Democratic | D+100.0 |
| MERCED, CA | Democratic | D+100.0 |
| MODOC, CA | Democratic | D+100.0 |
| MONO, CA | Democratic | D+100.0 |
| MONTEREY, CA | Democratic | D+100.0 |
| NAPA, CA | Democratic | D+100.0 |
| NEVADA, CA | Democratic | D+100.0 |
| ORANGE, CA | Democratic | D+100.0 |
| PLACER, CA | Democratic | D+100.0 |
| PLUMAS, CA | Democratic | D+100.0 |
| RIVERSIDE, CA | Democratic | D+100.0 |
| SACRAMENTO, CA | Democratic | D+100.0 |
| SAN BENITO, CA | Democratic | D+100.0 |
| SAN BERNARDINO, CA | Democratic | D+100.0 |
| SAN DIEGO, CA | Democratic | D+100.0 |
| SAN FRANCISCO, CA | Democratic | D+100.0 |
| SAN JOAQUIN, CA | Democratic | D+100.0 |
| SAN LUIS OBISPO, CA | Democratic | D+100.0 |
| SAN MATEO, CA | Democratic | D+100.0 |
| SANTA BARBARA, CA | Democratic | D+100.0 |
| SANTA CLARA, CA | Democratic | D+100.0 |
| SANTA CRUZ, CA | Democratic | D+100.0 |
| SHASTA, CA | Democratic | D+100.0 |
| SIERRA, CA | Democratic | D+100.0 |
| SISKIYOU, CA | Democratic | D+100.0 |
| SOLANO, CA | Democratic | D+100.0 |
| SONOMA, CA | Democratic | D+100.0 |
| STANISLAUS, CA | Democratic | D+100.0 |
| SUTTER, CA | Democratic | D+100.0 |
| TEHAMA, CA | Democratic | D+100.0 |
| TRINITY, CA | Democratic | D+100.0 |
| TULARE, CA | Democratic | D+100.0 |
| TUOLUMNE, CA | Democratic | D+100.0 |
| VENTURA, CA | Democratic | D+100.0 |
| YOLO, CA | Democratic | D+100.0 |
| YUBA, CA | Democratic | D+100.0 |
presidential baselinePresident 2016D+30.0Senate 2018D+100.0vs. baselineD+70.0
California's 2018 Senate race ran 70.0 points more Democratic than its 2016 presidential margin.
California's Senate margins
Every contest in our store, 1976–2024
| Year | Margin (D minus R) |
|---|---|
| 1976 | −3.3% |
| 1980 | +19.4% |
| 1982 | −6.8% |
| 1986 | +1.4% |
| 1988 | −8.8% |
| 1992 | +4.9% |
| 1994 | +1.9% |
| 1998 | +10.0% |
| 2000 | +19.3% |
| 2004 | +19.9% |
| 2006 | +24.4% |
| 2010 | +10.0% |
| 2012 | +25.0% |
| 2016 | +100.0% |
| 2018 | +100.0% |
| 2022 | +22.1% |
| 2024 | +17.7% |
Same ballot, 2018CA
Source. MIT Election Data + Science Lab — 2018 US Senate returns, party-classified by literal ballot party · county returns aggregated from precinct-level results. Real returns — nothing estimated.