2022Final results
2022 election for U.S. Senate in Iowa
U.S. Senate · Iowa
Chuck Grassley (R) won with 56.0% of the vote, defeating Michael Franken (D) by 12.2 points.
Chuck GrassleyRepublican · winner
56.0%681,501
Michael FrankenDemocrat
43.8%533,330
1,216,646 votes
Source: MIT Election Data and Science LabUpdated Oct 2, 2026, 5:14 AM ET
The seat over time
D − R margin in this seat's races around 2022
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 2, 2026, 5:14 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Michael FrankenChuck Grassley
$11.5M
Raised by the campaign
$9.5M
$11.4M
Spent by the campaign
$10.9M
$51.2K
Cash on hand
$441.4K
Campaign money: FEC, through Dec 31, 2022.
Source: FEC campaign filingsUpdated Dec 31, 2022