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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/2004/US House/Illinois/IL-12
      2004·US House·Illinois·District profile →

      Illinois District 12 US House

      Winner
      DEM
      Jerry F Costello
      69.5%198,962 votes
      Runner-up
      REP
      Erin R Zweigart
      28.9%82,677 votes
      Margin
      D+40.6
      286,435 total votes
      4 candidates286,435 total votes
      CandidatePartyVotes ▼%Vote Share
      Jerry F CostelloDEM✓
      		DEM198,96269.5%
      Erin R ZweigartREP
      		REP82,67728.9%
      Walter B SteeleLIB
      		LIB4,7941.7%
      WriteinOTH
      		OTH2---

      Presidential Vote by District

      5 elections · 2008–2024 · 118th Congress boundaries
      Latest (2024)R+43.5
      Shift vs 2020↓ R+0.7
      R+40R+20EvenD+20D+4020082012201620202024
      YearDem %Rep %MarginTurnout
      202427.5%71.0%R+43.5372,701
      202027.7%70.5%R+42.8383,257
      201626.0%68.5%R+42.6366,997
      201236.8%63.2%R+26.3339,881
      200843.7%53.7%R+10.0368,836

      Seat History

      US House in Illinois

      2024
      Mike BostREP
      R+48.4
      2022
      Mike BostREP
      R+50.0
      Redistricted
      2020
      Mike BostREP
      R+20.9
      2018
      Mike BostREP
      R+6.2
      2016
      Mike BostREP
      R+14.6
      2014
      Mike BostREP
      R+10.6
      2012
      William L EnyartDEM
      D+8.9
      Redistricted
      2010
      Jerry F CostelloDEM
      D+23.3
      2008
      Jerry F CostelloDEM
      D+46.5
      2006
      Jerry F CostelloDEM
      D+100.0
      2002
      Jerry F CostelloDEM
      D+38.5
      Redistricted
      2000
      Jerry F CostelloDEM
      D+100.0
      1998
      Jerry F CostelloDEM
      D+20.7
      1996
      Jerry F CostelloDEM
      D+45.0
      View all US House history for Illinois →

      Candidates

      WriteinOTH
      Record0W-2660L
      Avg Margin---
      Career1976-2024
      US House / Governor
      Full profile →
      Jerry F CostelloDEM
      Record12W-0L
      Avg Margin---
      Career1988-2010
      US House
      Full profile →
      Erin R ZweigartREP
      Record0W-1L
      Avg Margin---
      Career2004-2004
      US House
      Full profile →
      Walter B SteeleLIB
      Record0W-1L
      Avg Margin---
      Career2004-2004
      US House
      Full profile →

      Also in Illinois, 2004

      President1 contest →US Senate1 contest →
      ← All 2004 US House races2004 overviewIllinois profileAll elections