1972Final resultsIncumbent defeated
1972 election for South Dakota Legislative District 11
South Dakota State Senate · South Dakota
Michael Oconnor (D) won with 12.4% of the vote, defeating Oscar Austad (R) by 1.9 points.
Michael OconnorDemocrat · winner
12.4%26,313
Oscar AustadRepublican · incumbent
10.6%22,358
Jerry MayerDemocrat
10.5%22,207
Tom MillsRepublican · incumbent
10.4%22,003
Holger AndersonRepublican · incumbent
10.0%21,223
Mary WallnerDemocrat
9.5%20,148
Jerry SimmonsRepublican
9.4%19,969
Wally G. MyersDemocrat
9.2%19,541
Leroy A. JohnsonDemocrat
9.1%19,174
Wendell HansonRepublican
8.8%18,683
211,619 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 1972
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET