2018Final results
2018 election for Iowa House District 25
Iowa House of Representatives · Iowa
Stan Gustafson (R) won with 59.2% of the vote, defeating Ryan Marquardt (D) by 18.6 points.
Stan GustafsonRepublican · winner · incumbent
59.2%9,420
Ryan MarquardtDemocrat
40.7%6,470
15,900 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET