2020Final results
2020 election for South Dakota Legislative District 12
South Dakota House of Representatives · South Dakota
2 seats: Greg Jamison (R), Arch Beal (R) won.
2 seatsGreg JamisonRepublican · winner
37.8%13,599
Arch BealRepublican · winner · incumbent
31.3%11,242
Erin RoyerDemocrat
30.9%11,111
35,952 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