1972Final resultsIncumbent defeated
1972 election for South Dakota Legislative District 9
South Dakota House of Representatives · South Dakota
2 seats: Merwyn H. Walter (D), Duaine Swenson (D) won.
2 seatsMerwyn H. WalterDemocrat · winner · incumbent
34.4%5,614
Duaine SwensonDemocrat · winner · incumbent
34.2%5,589
Robert KostbothRepublican · incumbent
31.4%5,136
16,339 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