2018Final results
2018 election for South Dakota Legislative District 12
South Dakota State Senate · South Dakota
R. Blake Curd (R) won with 50.1% of the vote, defeating Kasey Olivier (D) by 0.3 points.
R. Blake CurdRepublican · winner · incumbent
50.1%4,870
Kasey OlivierDemocrat
49.9%4,845
9,715 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