2018 Iowa House Election Interactive Map

All US House seats to be contested in 2018

Iowa has four congressional districts, of which three are held by Republicans. Two of the four districts look to be highly competitive in 2018. Closely-contested battles here are not uncommon. Iowa has one of the most impartial processes in the nation for setting district borders. A non-partisan advisory commission is "not allowed to consider previous election results, voter registration, or even the addresses of incumbent members of Congress. No politician…is allowed to weigh in, or get a sneak preview."

To create your own forecast for the midterms, visit the 2018 House Interactive Map.


Hover over a district for details.

District Incumbent Party Since Term Predictions Margin of Victory
Pro Map House(a) President(b)
IA-1 Rod Blum
2015 2nd
7.7% 3.5%
IA-3 David Young
2015 2nd
13.7% 3.5%
IA-4 Steve King
2003 8th
22.6% 27.4%
IA-2 David Loebsack
2007 6th
7.5% 4.1%

(a)Source: Ballotpedia (for margins). The margin is the percentage difference between the top two vote-getters in 2016.
More recent results (i.e., special elections held in 2017-18 for vacancies) are not displayed.
* Race was uncontested | ^Top two vote-getters were from the same party

(b)Source: Daily Kos. The margin is the percentage difference between Donald Trump and Hillary Clinton.