2016Final results
2016 election for South Dakota Legislative District 9
South Dakota State Senate · South Dakota
Deb Peters (R) won with 65.4% of the vote, defeating John C. Koch (D) by 30.8 points.
Deb PetersRepublican · winner · incumbent
65.4%6,426
John C. KochDemocrat
34.6%3,398
The same year, the district voted R+22.2 for president; this race was R+30.8.9,824 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