2018Final resultsSpecial election
2018 special election for Oregon Senate District 1
Oregon State Senate · Oregon
Dallas Heard (R) won with 64.3% of the vote, defeating Shannon Souza (D) by 28.7 points.
Dallas HeardRepublican · winner
64.3%37,901
Shannon SouzaDemocrat
35.7%21,012
58,913 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)