June 5, 2018
| Candidate | Party | Votes | Pct. | |
|---|---|---|---|---|
| Dianne Feinstein | Democratic | 2,031,967 | 44.2% | |
| Kevin de Leon | Democratic | 528,043 | 11.5% | |
| James Bradley | Republican | 398,477 | 8.7% | |
| Arun Bhumitra | Republican | 248,297 | 5.4% | |
Others
|
1,295,662 | 28.2% |