2016Final results
2016 election for Illinois Legislative District 23
Illinois State Senate · Illinois
Thomas E. Cullerton (D) won with 50.7% of the vote, defeating Seth Lewis (R) by 1.4 points.
Thomas E. CullertonDemocrat · winner · incumbent
50.7%44,643
Seth LewisRepublican
49.3%43,429
The same year, the district voted D+11.9 for president; this race was D+1.4.88,072 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 4:52 AM ET
The seat over time
D − R margin in this seat's races around 2016
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 4:52 AM ET