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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/1966/US Senate/Colorado
      1966·US Senate·Colorado

      Colorado US Senate

      Winner
      REP
      Gordon Allott
      58.0%368,307 votes
      Runner-up
      DEM
      Roy Romer
      41.9%266,259 votes
      Margin
      R+16.1
      634,898 total votes
      3 candidates634,898 total votes
      CandidatePartyVotes ▼%Vote Share
      Gordon AllottREP✓
      		REP368,30758.0%
      Roy RomerDEM
      		DEM266,25941.9%
      OtherOTH
      		OTH3320.1%

      Seat History

      US Senate in Colorado(Class I)

      2022
      Michael BennetDEM
      D+14.6
      2020
      John HickenlooperDEM
      D+2.4
      2016
      Michael BennetDEM
      D+5.7
      2014
      Cory GardnerREP
      R+1.9
      2010
      Michael BennetDEM
      D+1.7
      2008
      Mark Emery UdallDEM
      D+10.3
      2004
      Ken SalazarDEM
      D+4.8
      2002
      Wayne AllardREP
      R+4.9
      1998
      Ben Nighthorse CampbellREP
      R+27.5
      1996
      Wayne AllardREP
      R+5.0
      1992
      Ben Nighthorse CampbellDEM
      D+9.1
      1990
      Hank BrownREP
      R+14.0
      1986
      Timothy WirthDEM
      D+1.6
      1984
      William L ArmstrongREP
      R+29.6
      1980
      Gary HartDEM
      D+1.6
      View all US Senate history for Colorado →

      Candidates

      Gordon AllottREP
      Record3W-1L
      Avg MarginR+6.3
      Career1954-1972
      US Senate
      Full profile →
      Roy RomerDEM
      Record3W-1L
      Avg MarginD+11.1
      Career1966-1994
      Governor / US Senate
      Full profile →

      Also in Colorado, 1966

      Governor1 contest →
      ← All 1966 US Senate races1966 overviewColorado profileAll elections