2020Final results
2020 election for South Dakota Legislative District 21
South Dakota State Senate · South Dakota
Erin Tobin (R) won with 79.2% of the vote, defeating Dan Andersson (D) by 58.4 points.
Erin TobinRepublican · winner
79.2%7,629
Dan AnderssonDemocrat
20.8%2,002
9,631 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET