2018 Montana elections

A general election was held in Montana on November 6, 2018. Montana's Class 1 United States Senate seat and its seat in the United States House of Representatives were up for elections, along with all of the seats in the Montana House of Representatives and half of the seats in the Montana Senate. Various local offices and ballot measures were also up for election. The primary election was held on June 5, 2018.

Senate
Incumbent Democrat Jon Tester won re-election.

House of Representatives
Incumbent Republican Greg Gianforte won re-election.

Senate
25 of the 50 seats in the Montana Senate were up for election in 2018.

House of Representatives
All 100 seats in the Montana House of Representatives were up for election in 2018.

Clerk of the Supreme Court
Incumbent Democrat Ed Smith did not run for re-election. Republican Bowen Greenwood defeated Democrat Rex Rank.