2010Final results
2010 election for Illinois's 12th District
U.S. House · Illinois
Jerry F. Costello (D) won with 59.8% of the vote, defeating Teri Newman (R) by 23.3 points.
Jerry F. CostelloDemocrat · winner
59.8%121,272
Teri NewmanRepublican
36.5%74,046
Rodger JenningsGreen
3.6%7,387
202,705 votes
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
The seat over time
D − R margin in this seat's races around 2010
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Jerry F. CostelloTeri Newman
$1.4M
Raised by the campaign
$47.1K
$1.4M
Spent by the campaign
$44.8K
$2M
Cash on hand
$2.3K
Other candidates' campaigns: Rodger Jennings $445.
Campaign money: FEC, through Dec 31, 2010; FEC, through Nov 2, 2010.
Source: FEC campaign filingsUpdated Dec 31, 2010