2018Final results
2018 election for Oregon Senate District 4
Oregon State Senate · Oregon
Floyd Prozanski (D) won with 59.1% of the vote, defeating Scott Rohter (R) by 20.8 points.
Floyd ProzanskiDemocrat · winner · incumbent
59.1%38,623
Scott RohterRepublican
38.3%25,031
Frank L. Lengele Jr.Independent
2.3%1,530
65,301 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET