1990Final results
1990 election for Minnesota House District 21B
Minnesota House of Representatives · Minnesota
Roger Cooper (D) won with 64.2% of the vote, defeating Norm Riediger (R) by 28.4 points.
Roger CooperDemocrat · winner · incumbent
64.2%7,359
Norm RiedigerRepublican
35.8%4,101
11,460 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