2018 general · November 6, 2018
2018 Oregon State Senate election results, district by district
Every Oregon 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 · 30 seats
After the electionD 18 · R 12
Races17
Changed party1
Unopposed18%3 races
Incumbents defeated0
Every district
D 11 · R 6
| Race | Winner | Won by | Notes |
|---|---|---|---|
| SD-1 | Dallas Heard (R) | 28.7 | |
| SD-3 | Jeff Golden (D) | 10.4 | |
| SD-4 | Floyd Prozanski (D) | 20.8 | |
| SD-6 | Lee Beyer (D) | 18.4 | |
| SD-7 | James Manning (D) | Unopposed | |
| SD-8 | Sara Gelser Blouin (D) | 28.4 | |
| SD-10 | Jackie Winters (R) | 8.0 | |
| SD-11 | Peter Courtney (D) | 21.3 | |
| SD-13 | Kim Thatcher (R) | 12.0 | |
| SD-15 | Chuck Riley (D) | 18.7 | |
| SD-16 | Betsy Johnson (D) | 65.0 | |
| SD-17 | Elizabeth Steinerhayward (D) | Unopposed | |
| SD-19 | Rob Wagner (D) | 31.2 | Flipped |
| SD-20 | Alan R. Olsen (R) | 5.8 | |
| SD-24 | Shemia Fagan (D) | Unopposed | |
| SD-26 | Chuck Thomsen (R) | 0.4 | |
| SD-30 | Cliff Bentz (R) | 43.6 |
Oregon 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: Harvard Dataverse / Carl Klarner; MIT Election Data and Science Lab