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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/1978/US House/Iowa/IA-03
      1978·US House·Iowa·District profile →

      Iowa District 3 US House

      Winner
      REP
      Charles E Grassley
      74.8%103,659 votes
      Runner-up
      DEM
      John Knudson
      25.2%34,880 votes
      Margin
      R+49.6
      138,539 total votes
      2 candidates138,539 total votes
      CandidatePartyVotes ▼%Vote Share
      Charles E GrassleyREP✓
      		REP103,65974.8%
      John KnudsonDEM
      		DEM34,88025.2%

      Presidential Vote by District

      5 elections · 2008–2024 · 118th Congress boundaries
      Latest (2024)R+4.4
      Shift vs 2020↓ R+4.1
      R+10EvenD+1020082012201620202024
      YearDem %Rep %MarginTurnout
      202447.1%51.6%R+4.4422,161
      202048.9%49.3%R+0.3420,101
      201644.8%47.8%R+3.0370,226
      201253.0%47.0%D+5.9361,323
      200852.5%45.1%D+7.5351,696

      Seat History

      US House in Iowa

      2024
      Zachary NunnREP
      R+3.8
      2022
      Zachary NunnREP
      R+0.7
      Redistricted
      2020
      Cynthia AxneDEM
      D+1.4
      2018
      Cynthia AxneDEM
      D+2.2
      2016
      David YoungREP
      R+13.7
      2014
      David YoungREP
      R+10.5
      2012
      Tom LathamREP
      R+8.6
      Redistricted
      2010
      Leonard L BoswellDEM
      D+4.3
      2008
      Leonard L BoswellDEM
      D+14.3
      2006
      Leonard L BoswellDEM
      D+5.4
      2004
      Leonard L BoswellDEM
      D+10.5
      2002
      Leonard L BoswellDEM
      D+8.4
      Redistricted
      2000
      Leonard L BoswellDEM
      D+29.1
      1998
      Leonard L BoswellDEM
      D+15.8
      1996
      Leonard L BoswellDEM
      D+1.7
      View all US House history for Iowa →

      Candidates

      Charles E GrassleyREP
      Record12W-0L
      Avg MarginR+31.8
      Career1970-2022
      US Senate / US House / State House
      Full profile →
      John KnudsonDEM
      Record0W-3L
      Avg MarginR+25.1
      Career1972-1978
      US House / State House
      Full profile →

      Also in Iowa, 1978

      US Senate1 contest →Governor1 contest →
      ← All 1978 US House races1978 overviewIowa profileAll elections