2018Final results
2018 election for Montana House District 9
Montana House of Representatives · Montana
David Dunn (R) won with 69.6% of the vote, defeating Bob Petersen (D) by 39.1 points.
David DunnRepublican · winner
69.6%2,626
Bob PetersenDemocrat
30.4%1,149
3,775 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