| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IA-01 | Jim LeachREP | REP | 90,193 | 99.8% | R+99.8 |
| IA-02 | Jim NussleREP | REP | 166,106 | 49.8% | R+1.0 |
| IA-03 | DEM | 101,780 | 99.2% | D+99.2 | |
| IA-04 | Neal SmithDEM | DEM | 130,590 | 97.9% | D+97.9 |
| IA-05 | REP | 147,012 | 68.0% | R+36.0 | |
| IA-06 | Fred GrandyREP | REP | 156,459 | 71.8% | R+43.6 |