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

      Oregon US Senate

      Winner
      REP
      Mark Hatfield
      51.7%354,391 votes
      Runner-up
      DEM
      Robert B Duncan
      48.2%330,374 votes
      Margin
      R+3.5
      685,067 total votes
      3 candidates685,067 total votes
      CandidatePartyVotes ▼%Vote Share
      Mark HatfieldREP✓
      		REP354,39151.7%
      Robert B DuncanDEM
      		DEM330,37448.2%
      OtherOTH
      		OTH3020.0%

      Seat History

      US Senate in Oregon(Class I)

      2022
      Ron WydenDEM
      D+14.9
      2020
      Jeff MerkleyDEM
      D+17.6
      2016
      Ron WydenDEM
      D+23.3
      2014
      Jeff MerkleyDEM
      D+18.9
      2010
      Ron WydenDEM
      D+18.0
      2008
      Jeff MerkleyDEM
      D+3.4
      2004
      Ron WydenDEM
      D+31.6
      2002
      Gordon SmithREP
      R+16.6
      1998
      Ron WydenDEM
      D+27.3
      1996(S)
      Ron WydenDEM
      D+1.5
      1996
      Gordon SmithREP
      R+3.9
      1992
      Bob PackwoodREP
      R+5.6
      1990
      Mark HatfieldREP
      R+7.5
      1986
      Bob PackwoodREP
      R+26.9
      1984
      Mark HatfieldREP
      R+33.1
      View all US Senate history for Oregon →

      Candidates

      Mark HatfieldREP
      Record11W-1L
      Avg MarginR+21.7
      Career1958-2010
      State House / US Senate / Governor
      Full profile →
      Robert B DuncanDEM
      Record2W-1L
      Avg MarginR+3.5
      Career1966-1978
      US House / US Senate
      Full profile →

      Also in Oregon, 1966

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