2020Final results
2020 election for Illinois Representative District 90
Illinois House of Representatives · Illinois
Tom Demmer (R) won with 67.3% of the vote, defeating Seth Wiggins (D) by 34.6 points.
Tom DemmerRepublican · winner · incumbent
67.3%34,129
Seth WigginsDemocrat
32.7%16,589
50,718 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET