2018Final results
2018 election for Oregon Senate District 15
Oregon State Senate · Oregon
Chuck Riley (D) won with 59.3% of the vote, defeating Alexander Flores (R) by 18.7 points.
Chuck RileyDemocrat · winner · incumbent
59.3%30,770
Alexander FloresRepublican
40.5%21,037
51,921 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