2018Flipped from RepublicanFinal resultsIncumbent defeated
2018 election for Iowa House District 38
Iowa House of Representatives · Iowa
Heather Matson (D) won with 51.5% of the vote, defeating Kevin Koester (R) by 3.2 points, a seat Republicans won last time.
Heather MatsonDemocrat · winner
51.5%8,216
Kevin KoesterRepublican · incumbent
48.4%7,710
15,941 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