Montana U.S. Senate election history

Every Montana U.S. Senate election from 1976 to 2024: winners, parties, margins and the seats that changed hands.

Current senators

Montana Senate races: Republican minus Democratic share, in points. Bars above the line lean Republican, below lean Democratic.

Year	Seat	Winner	Party	Runner-up	Margin	Votes
2024 flip	Class I	Tim Sheehy	Republican	Jon Tester	7.1	607,262
2020	Class II	Steve Daines	Republican	Steve Bullock	10.0	605,637
2018	Class I	Jon Tester	Democratic	Matt Rosendale	3.6	504,384
2014 flip	Class II	Steve Daines	Republican	Amanda G. Curtis	17.7	369,826
2012	Class I	Jon Tester	Democratic	Denny Rehberg	3.7	486,066
2008	Class II	Max Baucus	Democratic	Bob Kelleher	45.8	477,658
2006 flip	Class I	Jon Tester	Democratic	Conrad Burns	0.9	406,505
2002	Class II	Max Baucus	Democratic	Mike Taylor	31.0	326,537
2000	Class I	Conrad Burns	Republican	Brian Schweitzer	3.3	411,601
1996	Class II	Max Baucus	Democratic	Denny Rehberg	4.9	407,490
1994	Class I	Conrad Burns	Republican	Jack Mudd	24.7	350,387
1990	Class II	Max Baucus	Democratic	Allen Kolstad	38.8	319,336
1988 flip	Class I	Conrad Burns	Republican	John David Melcher	3.7	365,254
1984	Class II	Max Baucus	Democratic	Chuck Cozzens	16.2	379,155
1982	Class I	John David Melcher	Democratic	Larry Williams	12.8	321,062
1978	Class II	Max Baucus	Democratic	Larry Williams	11.4	287,942
1976	Class I	John David Melcher	Democratic	Stanley C. Burger	28.3	321,445

Tim Sheehy won in 2024 by 7.1 points.

Steve Daines (Republican, term ends 2027) and Tim Sheehy (Republican, term ends 2031).

In 2018, when Jon Tester won.

In 2024, when Tim Sheehy won.

Results: FiveThirtyEight (from 1976 for Senate, 1996 for governor). Current members: congress-legislators.