1970Final results
1970 election for South Dakota Legislative District 31
South Dakota House of Representatives · South Dakota
Robert Kostboth (R) won with 57.4% of the vote, defeating Gerald A. Bunkers (D) by 14.7 points.
Robert KostbothRepublican · winner
57.4%1,954
Gerald A. BunkersDemocrat
42.6%1,453
3,407 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