2018Final results
2018 election for South Dakota Legislative District 3
South Dakota State Senate · South Dakota
Al Novstrup (R) won with 58.5% of the vote, defeating Cory Allen Heidelberger (D) by 17.0 points.
Al NovstrupRepublican · winner · incumbent
58.5%5,338
Cory Allen HeidelbergerDemocrat
41.5%3,787
9,125 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