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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/2010/US House/Iowa/IA-03
      2010·US House·Iowa·District profile →

      Iowa District 3 US House

      Winner
      DEM
      Leonard L Boswell
      50.7%122,147 votes
      Runner-up
      REP
      Brad Zaun
      46.5%111,925 votes
      Margin
      D+4.3
      240,756 total votes
      4 candidates240,756 total votes
      CandidatePartyVotes ▼%Vote Share
      Leonard L BoswellDEM✓
      		DEM122,14750.7%
      Brad ZaunREP
      		REP111,92546.5%
      Rebecca WilliamsonOTH
      		OTH6,2582.6%
      WriteinOTH
      		OTH4260.2%

      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
      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

      WriteinOTH
      Record0W-2660L
      Avg Margin---
      Career1976-2024
      US House / Governor
      Full profile →
      Leonard L BoswellDEM
      Record11W-1L
      Avg MarginD+17.9
      Career1984-2012
      US House / State Senate
      Full profile →
      Brad ZaunREP
      Record5W-1L
      Avg MarginR+46.6
      Career2004-2020
      State Senate / US House
      Full profile →
      Rebecca WilliamsonOTH
      Record0W-1L
      Avg Margin---
      Career2010-2010
      US House
      Full profile →

      Also in Iowa, 2010

      US Senate1 contest →Governor1 contest →
      ← All 2010 US House races2010 overviewIowa profileAll elections