Primary Elections
Montana Primary Elections 2026
Primary date, filing deadlines, key contested races, and what to watch in Montana ahead of the 2026 general election.
June 2, 2026
Primary Date
None
Runoff / RCV
March 2026
Filing Deadline
Moderate — Governor open seat
Competitiveness
Key 2026 Primary Races
| U.S. Senate | Steve Daines (R) up 2026 |
| Governor | Greg Gianforte (R) is term-limited — open seat |
| U.S. House | MT-1 and MT-2 safe Republican |
2026 Primary Overview
Montana has an open governor seat (Gianforte term-limited) that will generate a competitive Republican primary. Steve Daines faces Senate re-election and is expected to win comfortably. Democrats may not field strong challengers given the state shift.