2018Final results
2018 election for South Dakota Treasurer
Treasurer · South Dakota
Josh Haeder (R) won with 62.4% of the vote, defeating Aaron Matson (D) by 24.7 points.
Josh HaederRepublican · winner
62.4%194,782
Aaron MatsonDemocrat
37.6%117,549
312,331 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