2022Final resultsIncumbent defeated
2022 election for Illinois Representative District 45
Illinois House of Representatives · Illinois
Jenn Ladisch Douglass (D) won with 50.4% of the vote, defeating Deanne Marie Mazzochi (R) by 0.8 points.
Jenn Ladisch DouglassDemocrat · winner
50.4%21,960
Deanne Marie MazzochiRepublican · incumbent
49.6%21,596
43,556 votes
Source: MIT Election Data and Science LabUpdated Oct 2, 2026, 5:14 AM ET
The seat over time
D − R margin in this seat's races around 2022
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 2, 2026, 5:14 AM ET