1968Final results
1968 election for South Dakota Legislative District 20
South Dakota State Senate · South Dakota
George W. Fillbach (R) won with 56.6% of the vote, defeating Arnold Petersen (D) by 13.1 points.
George W. FillbachRepublican · winner · incumbent
56.6%5,346
Arnold PetersenDemocrat
43.4%4,106
9,452 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 1968
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET