1978Flipped from DemocraticFinal resultsIncumbent defeated
1978 election for Iowa House District 91
Iowa House of Representatives · Iowa
Harold Vanmaanen (R) won with 54.7% of the vote, defeating Fred L. Koogler (D) by 9.4 points, a seat Democrats won last time.
Harold VanmaanenRepublican · winner
54.7%4,534
Fred L. KooglerDemocrat · incumbent
45.3%3,755
8,289 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