1970Final resultsIncumbent defeated
1970 election for South Dakota Legislative District 30
South Dakota House of Representatives · South Dakota
2 seats: Michael Oconnor (D), Robert R. Giebink (R) won.
2 seatsMichael OconnorDemocrat · winner
6.9%18,200
Robert R. GiebinkRepublican · winner · incumbent
6.1%16,128
Sheldon R. SongstadRepublican
5.8%15,357
David BillionRepublican · incumbent
5.8%15,224
Larry PiersolDemocrat
5.7%15,111
Robert SivertsonDemocrat
5.6%14,830
George KirkRepublican
5.6%14,750
G. E. ScribnerRepublican · incumbent
5.6%14,698
Eunice M. AndersonRepublican · incumbent
5.5%14,615
David C. VigenDemocrat
5.5%14,613
Charles LaceyRepublican · incumbent
5.5%14,561
Sam D. SechserRepublican
5.3%14,140
Austin BoenDemocrat
5.3%14,057
Clarence DybvigRepublican
5.3%13,940
John McMahonDemocrat
5.2%13,791
Irvin SchreursDemocrat
5.2%13,650
James KlauerDemocrat
5.2%13,621
Walter ZuelkeDemocrat
5.0%13,159
264,445 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
The candidates
Michael Oconnor (D)Robert R. Giebink (R)Sheldon R. Songstad (R)David Billion (R)Larry Piersol (D)Robert Sivertson (D)George Kirk (R)G. E. Scribner (R)Eunice M. Anderson (R)David C. Vigen (D)Charles Lacey (R)Sam D. Sechser (R)Austin Boen (D)Clarence Dybvig (R)John McMahon (D)Irvin Schreurs (D)James Klauer (D)Walter Zuelke (D)