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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/1940/US Senate/Wyoming
      1940·US Senate·Wyoming

      Wyoming US Senate

      Winner
      DEM
      Joseph O'Mahoney
      58.7%65,022 votes
      Runner-up
      REP
      Milward Simpson
      41.3%45,682 votes
      Margin
      D+17.5
      110,704 total votes
      2 candidates110,704 total votes
      CandidatePartyVotes ▼%Vote Share
      Joseph O'MahoneyDEM✓
      		DEM65,02258.7%
      Milward SimpsonREP
      		REP45,68241.3%

      Seat History

      US Senate in Wyoming(Class II)

      2024
      John BarrassoREP
      R+51.0
      2020
      Cynthia M LummisREP
      R+46.1
      2018
      John BarrassoREP
      R+36.9
      2014
      Michael B EnziREP
      R+54.7
      2012
      John BarrassoREP
      R+54.0
      2008(S)
      John BarrassoREP
      R+46.8
      2008
      Michael B EnziREP
      R+51.4
      2006
      Craig ThomasREP
      R+40.1
      2002
      Michael B EnziREP
      R+45.9
      2000
      Craig ThomasREP
      R+51.7
      1996
      Michael B EnziREP
      R+11.8
      1994
      Craig ThomasREP
      R+19.6
      1990
      Alan K. SimpsonREP
      R+27.9
      1988
      Malcolm WallopREP
      R+0.7
      1984
      Alan K. SimpsonREP
      R+56.6
      View all US Senate history for Wyoming →

      Candidates

      Joseph O'MahoneyDEM
      Record4W-1L
      Avg MarginD+8.7
      Career1934-1954
      US Senate
      Full profile →
      Milward SimpsonREP
      Record2W-2L
      Avg MarginD+0.8
      Career1940-1962
      US Senate / Governor
      Full profile →

      Also in Wyoming, 1940

      President1 contest →
      ← All 1940 US Senate races1940 overviewWyoming profileAll elections