2016Final results
2016 election for Iowa Senate District 4
Iowa State Senate · Iowa
Dennis Guth (R) won with 60.7% of the vote, defeating Susan Bangert (D) by 21.4 points.
Dennis GuthRepublican · winner · incumbent
60.7%18,359
Susan BangertDemocrat
39.3%11,889
30,270 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 4:52 AM ET
The seat over time
D − R margin in this seat's races around 2016
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 4:52 AM ET