| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IA-01 | Jim LeachREP | REP | 185,716 | 60.7% | R+22.3 |
| IA-02 | REP | 200,041 | 56.8% | R+13.6 | |
| IA-03 | DEM | 203,932 | 63.4% | D+26.7 | |
| IA-04 | Neal SmithDEM | DEM | 219,223 | 71.7% | D+43.3 |
| IA-05 | REP | 184,368 | 63.9% | R+27.8 | |
| IA-06 | Fred GrandyREP | REP | 195,478 | 64.4% | R+28.8 |