2018Final results
2018 election for Montana Senate District 42
Montana State Senate · Montana
Jill Cohenour (D) won with 57.1% of the vote, defeating Bob Leach (R) by 14.1 points.
Jill CohenourDemocrat · winner · incumbent
57.1%5,556
Bob LeachRepublican
42.9%4,180
9,736 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