2018Final results
2018 election for South Dakota Legislative District 9
South Dakota State Senate · South Dakota
Wayne H. Steinhauer (R) won with 56.7% of the vote, defeating Laura Swier Kotelman (D) by 13.3 points.
Wayne H. SteinhauerRepublican · winner
56.7%4,760
Laura Swier KotelmanDemocrat
43.3%3,641
8,401 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