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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/2010/US House/Illinois/IL-12
      2010·US House·Illinois·District profile →

      Illinois District 12 US House

      Winner
      DEM
      Jerry F Costello
      59.8%121,272 votes
      Runner-up
      REP
      Teri Newman
      36.5%74,046 votes
      Margin
      D+23.3
      202,705 total votes
      3 candidates202,705 total votes
      CandidatePartyVotes ▼%Vote Share
      Jerry F CostelloDEM✓
      		DEM121,27259.8%
      Teri NewmanREP
      		REP74,04636.5%
      Rodger W JenningsGRN
      		GRN7,3873.6%

      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
      2008
      Jerry F CostelloDEM
      D+46.5
      2006
      Jerry F CostelloDEM
      D+100.0
      2004
      Jerry F CostelloDEM
      D+40.6
      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

      Jerry F CostelloDEM
      Record12W-0L
      Avg Margin---
      Career1988-2010
      US House
      Full profile →
      Rodger W JenningsGRN
      Record0W-2L
      Avg Margin---
      Career2008-2010
      US House
      Full profile →
      Teri NewmanREP
      Record0W-1L
      Avg Margin---
      Career2010-2010
      US House
      Full profile →

      Also in Illinois, 2010

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