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      Akashic HQ provides deep political data analysis covering 165 years of U.S. elections.

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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/1970/US Senate/Illinois
      1970·US Senate·Illinois
      Special

      Illinois US Senate

      Winner
      DEM
      Adlai Stevenson III
      57.4%2,065,054 votes
      Runner-up
      REP
      Ralph T Smith
      42.2%1,519,718 votes
      Margin
      D+15.2
      3,599,272 total votes
      3 candidates3,599,272 total votes
      CandidatePartyVotes ▼%Vote Share
      Adlai Stevenson IIIDEM✓
      		DEM2,065,05457.4%
      Ralph T SmithREP
      		REP1,519,71842.2%
      OtherOTH
      		OTH14,5000.4%

      Seat History

      US Senate in Illinois(Class I)

      2022
      Tammy DuckworthDEM
      D+15.3
      2020
      Richard J DurbinDEM
      D+16.1
      2016
      Tammy DuckworthDEM
      D+15.1
      2014
      Richard J DurbinDEM
      D+10.8
      2010
      Mark Steven KirkREP
      R+1.6
      2008
      Richard J DurbinDEM
      D+39.3
      2004
      Barack ObamaDEM
      D+42.9
      2002
      Richard J DurbinDEM
      D+22.3
      1998
      Peter G FitzgeraldREP
      R+2.9
      1996
      Richard J DurbinDEM
      D+15.4
      1992
      Carol Moseley-BraunDEM
      D+10.2
      1990
      Paul SimonDEM
      D+30.1
      1986
      Alan J. DixonDEM
      D+31.4
      1984
      Paul SimonDEM
      D+1.9
      1980
      Alan J. DixonDEM
      D+13.5
      View all US Senate history for Illinois →

      Candidates

      Adlai Stevenson IIIDEM
      Record2W-0L
      Avg MarginD+20.0
      Career1970-1974
      US Senate
      Full profile →
      Ralph T SmithREP
      Record1W-1L
      Avg MarginD+16.1
      Career1968-1970
      US Senate / State House
      Full profile →
      ← All 1970 US Senate races1970 overviewIllinois profileAll elections