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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/2018/US Senate/Montana
      2018·US Senate·Montana

      Montana US Senate

      Winner
      DEM
      Jon Tester
      50.3%253,876 votes
      Runner-up
      REP
      Matthew Rosendale
      46.8%235,963 votes
      Margin
      D+3.5
      504,384 total votes
      3 candidates504,384 total votes
      CandidatePartyVotes ▼%Vote Share
      Jon TesterDEM✓
      		DEM253,87650.3%
      Matthew RosendaleREP
      		REP235,96346.8%
      OtherOTH
      		OTH14,5452.9%

      Seat History

      US Senate in Montana(Class II)

      2024
      Tim SheehyREP
      R+7.1
      2020
      Steve DainesREP
      R+10.0
      2014
      Steve DainesREP
      R+17.7
      2012
      Jon TesterDEM
      D+3.7
      2008
      Max S BaucusDEM
      D+45.8
      2006
      Jon TesterDEM
      D+0.9
      2002
      Max S BaucusDEM
      D+31.0
      2000
      Conrad BurnsREP
      R+3.3
      1996
      Max S BaucusDEM
      D+4.9
      1994
      Conrad BurnsREP
      R+24.7
      1990
      Max S BaucusDEM
      D+38.8
      1988
      Conrad BurnsREP
      R+3.7
      1984
      Max S BaucusDEM
      D+16.2
      1982
      John MelcherDEM
      D+12.8
      View all US Senate history for Montana →

      Candidates

      Jon TesterDEM
      Record5W-1L
      Avg MarginD+12.3
      Career1998-2024
      US Senate / State Senate
      Full profile →
      Matthew RosendaleREP
      Record1W-1L
      Avg MarginD+3.5
      Career2018-2020
      US House / US Senate
      Full profile →

      Also in Montana, 2018

      US House1 contest →
      ← All 2018 US Senate races2018 overviewMontana profileAll elections