2020Final results
2020 election for Idaho Legislative District 18
Idaho State Senate · Idaho
Janie Ward-Engelking (D) won with 61.9% of the vote, defeating Mark A. Bost (R) by 23.9 points.
Janie Ward-EngelkingDemocrat · winner · incumbent
61.9%17,928
Mark A. BostRepublican
38.1%11,022
28,955 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET