2018Final results
2018 election for Illinois Legislative District 33
Illinois State Senate · Illinois
Don DeWitte (R) won with 50.6% of the vote, defeating Nancy Zettler (D) by 1.2 points.
Don DeWitteRepublican · winner
50.6%46,040
Nancy ZettlerDemocrat
49.4%44,965
91,005 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