2020Final resultsIncumbent defeated
2020 election for South Dakota Legislative District 13
South Dakota House of Representatives · South Dakota
2 seats: Sue Peterson (R), Richard L. Thomason (R) won.
2 seatsSue PetersonRepublican · winner · incumbent
28.2%6,746
Richard L. ThomasonRepublican · winner
26.0%6,215
Kelly A. SullivanDemocrat · incumbent
24.5%5,846
Norman B. BlissDemocrat
21.3%5,094
23,901 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