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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/2010/US Senate/Iowa
      2010·US Senate·Iowa

      Iowa US Senate

      Winner
      REP
      Charles E Grassley
      64.3%718,215 votes
      Runner-up
      DEM
      Roxanne Conlin
      33.3%371,686 votes
      Margin
      R+31.1
      1,116,063 total votes
      3 candidates1,116,063 total votes
      CandidatePartyVotes ▼%Vote Share
      Charles E GrassleyREP✓
      		REP718,21564.3%
      Roxanne ConlinDEM
      		DEM371,68633.3%
      OtherOTH
      		OTH26,1622.3%

      Seat History

      US Senate in Iowa(Class I)

      2022
      Charles E GrassleyREP
      R+12.2
      2020
      Joni K ErnstREP
      R+6.6
      2016
      Charles E GrassleyREP
      R+24.4
      2014
      Joni K ErnstREP
      R+8.3
      2008
      Tom HarkinDEM
      D+25.4
      2004
      Charles E GrassleyREP
      R+42.3
      2002
      Tom HarkinDEM
      D+10.4
      1998
      Charles E GrassleyREP
      R+37.9
      1996
      Tom HarkinDEM
      D+5.1
      1992
      Charles E GrassleyREP
      R+42.4
      1990
      Tom HarkinDEM
      D+9.1
      1986
      Charles E GrassleyREP
      R+32.5
      1984
      Tom HarkinDEM
      D+11.8
      1980
      Charles E GrassleyREP
      R+8.0
      View all US Senate history for Iowa →

      Candidates

      Charles E GrassleyREP
      Record12W-0L
      Avg MarginR+31.8
      Career1970-2022
      US Senate / US House / State House
      Full profile →
      Roxanne ConlinDEM
      Record0W-2L
      Avg MarginR+18.6
      Career1982-2010
      US Senate / Governor
      Full profile →

      Also in Iowa, 2010

      US House5 contests →Governor1 contest →
      ← All 2010 US Senate races2010 overviewIowa profileAll elections