2016Final results
2016 election for U.S. Senate in Iowa
U.S. Senate · Iowa
Chuck Grassley (R) won with 60.1% of the vote, defeating Patty Judge (D) by 24.4 points.
Chuck GrassleyRepublican · winner
60.1%926,007
Patty JudgeDemocrat
35.7%549,460
Charles AldrichLibertarian
2.7%41,794
Jim HennagerOther party
1.1%17,649
Michael Luick-ThramsIndependent
0.3%4,441
1,541,036 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
Money in this race
Each line compares the two campaigns on one scale.
Patty JudgeChuck Grassley
$2.3M
Raised by the campaign
$9M
$2.2M
Spent by the campaign
$9.8M
$65K
Cash on hand
$1M
Other candidates' campaigns: Michael Luick-Thrams $5.2K.
Campaign money: FEC, through Dec 31, 2016.
Source: FEC campaign filingsUpdated Dec 31, 2016
The candidates
Chuck Grassley (R)Patty Judge (D)
Also on the ballot: Charles Aldrich (Libertarian), 2.7%; Jim Hennager (Other party), 1.1%; Michael Luick-Thrams (Independent), 0.3%