1986Final results
1986 election for Oregon Senate District 13
Oregon State Senate · Oregon
Joyce Cohen (D) won with 53.8% of the vote, defeating Bob Tiernan (R) by 7.7 points.
Joyce CohenDemocrat · winner · incumbent
53.8%20,760
Bob TiernanRepublican
46.1%17,794
38,561 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 1986
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET