1990Final results
1990 election for South Dakota Legislative District 12
South Dakota State Senate · South Dakota
Keith Paisley (R) won with 58.4% of the vote, defeating Robert Oconnor (D) by 16.7 points.
Keith PaisleyRepublican · winner · incumbent
58.4%3,879
Robert OconnorDemocrat
41.6%2,767
6,646 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 1990
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET