2018 general · November 6, 2018
2018 California State Senate election results, district by district
Every California State Senate district in the 2018 general election: winners, margins, unopposed seats and seats that changed party.
Seats after the election
Democrats controlled the chamber · 40 seats
After the electionD 30 · R 10
Races20
Changed party3
Unopposed5%1 races
Incumbents defeated2
Every district
D 14 · R 6
| Race | Winner | Won by | Notes |
|---|---|---|---|
| SD-2 | Mike McGuire (D) | 34.4 | |
| SD-4 | Jim Nielsen (R) | 14.3 | |
| SD-6 | Richard Pan (D) | 39.1 | |
| SD-8 | Andreas Borgeas (R) | 19.2 | |
| SD-10 | Bob Wieckowski (D) | 51.2 | |
| SD-12 | Anna Caballero (D) | 8.7 | Flipped |
| SD-14 | Melissa Hurtado (D) | 11.6 | FlippedIncumbent lost |
| SD-16 | Shannon Grove (R) | 28.4 | |
| SD-18 | Bob Hertzberg (D) | 56.2 | |
| SD-20 | Connie M. Leyva (D) | 38.9 | |
| SD-22 | Susan Rubio (D) | 4.6 | |
| SD-24 | María Elena Durazo (D) | 33.7 | |
| SD-26 | Ben Allen (D) | 54.5 | |
| SD-28 | Jeff Stone (R) | 3.2 | |
| SD-30 | Holly J. Mitchell (D) | Unopposed | |
| SD-32 | Bob Archuleta (D) | 33.8 | |
| SD-34 | Tom Umberg (D) | 1.2 | FlippedIncumbent lost |
| SD-36 | Patricia C. Bates (R) | 3.1 | |
| SD-38 | Brian Jones (R) | 6.0 | |
| SD-40 | Ben Hueso (D) | 31.7 |
California State Senate
Results are each source's final count; margins are the winner's lead over the runner-up in points of the vote. Source: MIT Election Data and Science Lab