1978Final results
1978 election for Wisconsin Assembly District 89
Wisconsin State Assembly · Wisconsin
Cletus Vanderperren (D) won with 64.6% of the vote, defeating William H. Dierks (R) by 29.1 points.
Cletus VanderperrenDemocrat · winner · incumbent
64.6%8,826
William H. DierksRepublican
35.4%4,842
13,668 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 1978
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET