No senate race in California this year.
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Senate race by county
| County | Dem | GOP | Ind | |
|---|---|---|---|---|
| Alameda | – | – | – | |
| Alpine | – | – | – | |
| Amador | – | – | – | |
| Butte | – | – | – | |
| Calaveras | – | – | – | |
| Colusa | – | – | – | |
| Contra Costa | – | – | – | |
| Del Norte | – | – | – | |
| El Dorado | – | – | – | |
| Fresno | – | – | – | |
| Glenn | – | – | – | |
| Humboldt | – | – | – | |
| Imperial | – | – | – | |
| Inyo | – | – | – | |
| Kern | – | – | – | |
| Kings | – | – | – | |
| Lake | – | – | – | |
| Lassen | – | – | – | |
| Los Angeles | – | – | – | |
| Madera | – | – | – | |
| Marin | – | – | – | |
| Mariposa | – | – | – | |
| Mendocino | – | – | – | |
| Merced | – | – | – | |
| Modoc | – | – | – | |
| Mono | – | – | – | |
| Monterey | – | – | – | |
| Napa | – | – | – | |
| Nevada | – | – | – | |
| Orange | – | – | – | |
| Placer | – | – | – | |
| Plumas | – | – | – | |
| Riverside | – | – | – | |
| Sacramento | – | – | – | |
| San Benito | – | – | – | |
| San Bernardino | – | – | – | |
| San Diego | – | – | – | |
| San Francisco | – | – | – | |
| San Joaquin | – | – | – | |
| San Luis Obispo | – | – | – | |
| San Mateo | – | – | – | |
| Santa Barbara | – | – | – | |
| Santa Clara | – | – | – | |
| Santa Cruz | – | – | – | |
| Shasta | – | – | – | |
| Sierra | – | – | – | |
| Siskiyou | – | – | – | |
| Solano | – | – | – | |
| Sonoma | – | – | – | |
| Stanislaus | – | – | – | |
| Sutter | – | – | – | |
| Tehama | – | – | – | |
| Trinity | – | – | – | |
| Tulare | – | – | – | |
| Tuolumne | – | – | – | |
| Ventura | – | – | – | |
| Yolo | – | – | – | |
| Yuba | – | – | – |