| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| OH-01 | Steve ChabotREP | REP | 170,928 | 64.8% | R+29.6 |
| OH-02 | Rob PortmanREP | REP | 188,016 | 74.0% | R+48.1 |
| OH-03 | REP | 189,951 | 58.8% | R+17.5 | |
| OH-04 | REP | 177,727 | 67.5% | R+35.0 | |
| OH-05 | REP | 188,254 | 67.1% | R+39.5 | |
| OH-06 | DEM | 191,615 | 59.5% | D+19.0 | |
| OH-07 | REP | 167,632 | 67.6% | R+40.4 | |
| OH-08 | REP | 169,391 | 70.8% | R+41.6 | |
| OH-09 | Marcy KapturDEM | DEM | 178,717 | 74.0% | D+48.0 |
| OH-10 | DEM | 175,536 | 74.1% | D+50.3 | |
| OH-11 | DEM | 152,736 | 76.3% | D+52.7 | |
| OH-12 | REP | 181,689 | 64.4% | R+28.8 | |
| OH-13 | DEM | 178,382 | 69.0% | D+37.9 | |
| OH-14 | REP | 186,372 | 72.1% | R+44.3 | |
| OH-15 | REP | 162,479 | 66.6% | R+33.2 | |
| OH-16 | REP | 188,378 | 68.9% | R+37.7 | |
| OH-17 | DEM | 184,674 | 51.1% | D+17.5 | |
| OH-18 | REP | 125,546 | 100.0% | R+100.0 |