2020Final results
2020 election for South Dakota Legislative District 34
South Dakota State Senate · South Dakota
Michael G. Diedrich (R) won with 64.4% of the vote, defeating George Nelson (D) by 28.8 points.
Michael G. DiedrichRepublican · winner
64.4%8,079
George NelsonDemocrat
35.6%4,470
12,549 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