2004Flipped from RepublicanFinal resultsIncumbent defeated
2004 election for Iowa House District 31
Iowa House of Representatives · Iowa
Ray Zirkelbach (D) won with 54.2% of the vote, defeating Gene Manternach (R) by 8.4 points, a seat Republicans won last time.
Ray ZirkelbachDemocrat · winner
54.2%8,172
Gene ManternachRepublican · incumbent
45.8%6,910
15,082 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 2004
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET