2018Final results
2018 election for Wisconsin Senate District 9
Wisconsin State Senate · Wisconsin
Devin LeMahieu (R) won with 58.5% of the vote, defeating Kyle Whelton (D) by 17.0 points.
Devin LeMahieuRepublican · winner · incumbent
58.5%44,680
Kyle WheltonDemocrat
41.5%31,684
76,364 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