2018Final results
2018 election for Montana Senate District 11
Montana State Senate · Montana
Tom Jacobson (D) won with 57.5% of the vote, defeating Adam Rosendale (R) by 15.0 points.
Tom JacobsonDemocrat · winner
57.5%4,706
Adam RosendaleRepublican
42.5%3,478
8,184 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