2020Final results
2020 election for Iowa Senate District 20
Iowa State Senate · Iowa
Brad Zaun (R) won with 51.1% of the vote, defeating Rhonda Martin (D) by 2.3 points.
Brad ZaunRepublican · winner · incumbent
51.1%21,943
Rhonda MartinDemocrat
48.8%20,968
42,962 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET