1992Final results
1992 election for South Dakota Legislative District 9
South Dakota State Senate · South Dakota
Mark E. Rogen (D) won with 55.6% of the vote, defeating Clarence Kooistra (R) by 11.1 points.
Mark E. RogenDemocrat · winner
55.6%5,099
Clarence KooistraRepublican
44.4%4,076
9,175 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 1992
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET