1986Final results
1986 election for Illinois's 4th District
U.S. House · Illinois
Jack Davis (R) won with 51.6% of the vote, defeating Shawn Collins (D) by 3.2 points.
Jack DavisRepublican · winner
51.6%61,583
Shawn CollinsDemocrat
48.4%57,773
119,356 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 1986
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.
Shawn CollinsJack Davis
$207.9K
Raised by the campaign
$265.3K
$203.8K
Spent by the campaign
$263.4K
$4.2K
Cash on hand
$1.9K
Campaign money: FEC, through Dec 31, 1986.
Source: FEC campaign filingsUpdated Dec 31, 1986