1984Final results
1984 election for Iowa's 3rd District
U.S. House · Iowa
Cooper Evans (R) won with 60.7% of the vote, defeating Joe Johnston (D) by 21.4 points.
Cooper EvansRepublican · winner
60.7%133,737
Joe JohnstonDemocrat
39.3%86,574
220,311 votes
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
The seat over time
D − R margin in this seat's races around 1984
Races before and after
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)
Money in this race
Each line compares the two campaigns on one scale.
Joe JohnstonCooper Evans
$112.5K
Raised by the campaign
$407.1K
$112.4K
Spent by the campaign
$366.9K
$135
Cash on hand
$42K
Campaign money: FEC, through Dec 31, 1984.
Source: FEC campaign filingsUpdated Dec 31, 1984