2012Final results
2012 election for Illinois's 6th District
U.S. House · Illinois
Peter J. Roskam (R) won with 59.2% of the vote, defeating Leslie Coolidge (D) by 18.4 points.
Peter J. RoskamRepublican · winner
59.2%193,138
Leslie CoolidgeDemocrat
40.8%132,991
326,129 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 2012
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.
Leslie CoolidgePeter J. Roskam
$413.4K
Raised by the campaign
$3.3M
$411.1K
Spent by the campaign
$3.4M
$2.2K
Cash on hand
$1M
Campaign money: FEC, through Dec 31, 2012.
Source: FEC campaign filingsUpdated Dec 31, 2012