2018Final results
2018 election for Idaho Legislative District 8
Idaho State Senate · Idaho
Steven Thayn (R) won with 71.0% of the vote, defeating Bill Siffordthayn (Ind) by 48.3 points.
Steven ThaynRepublican · winner · incumbent
71.0%14,128
Bill SiffordthaynIndependent
22.7%4,510
Kirsten Faith RichardsonConstitution
6.4%1,265
19,903 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