2018Final results
2018 election for Illinois Representative District 116
Illinois House of Representatives · Illinois
Jerry Costello II (D) won with 53.5% of the vote, defeating David Friess (R) by 7.0 points.
Jerry Costello IIDemocrat · winner · incumbent
53.5%22,429
David FriessRepublican
46.5%19,480
41,909 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET