2018Final results
2018 election for Wisconsin Assembly District 40
Wisconsin State Assembly · Wisconsin
Kevin Petersen (R) won with 64.3% of the vote, defeating Erin Tracy (D) by 28.7 points.
Kevin PetersenRepublican · winner · incumbent
64.3%15,794
Erin TracyDemocrat
35.7%8,759
24,553 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