1970Final resultsIncumbent defeated
1970 election for South Dakota Legislative District 11
South Dakota State Senate · South Dakota
Holger Anderson (R) won with 13.8% of the vote, defeating Oscar Austad (R) by 0.0 points.
Holger AndersonRepublican · winner · incumbent
13.8%16,607
Oscar AustadRepublican
13.8%16,607
Tom MillsRepublican
13.7%16,498
Henry T. QuinnRepublican · incumbent
12.5%15,075
Walter FlanaganDemocrat
11.7%14,106
Al BaderDemocrat
11.6%13,950
Clem WeberDemocrat
11.5%13,886
W. E. HoliwayDemocrat
11.5%13,873
120,602 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 1970
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET