| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| OH-01 | Steve ChabotREP | REP | 289,863 | 59.8% | R+19.7 |
| OH-02 | Rob PortmanREP | REP | 316,760 | 71.7% | R+43.4 |
| OH-03 | REP | 316,738 | 62.3% | R+24.6 | |
| OH-04 | REP | 286,345 | 58.6% | R+17.2 | |
| OH-05 | REP | 293,305 | 67.0% | R+34.1 | |
| OH-06 | DEM | 223,987 | 99.9% | D+99.9 | |
| OH-07 | REP | 287,151 | 65.0% | R+29.9 | |
| OH-08 | REP | 292,249 | 69.0% | R+38.0 | |
| OH-09 | Marcy KapturDEM | DEM | 301,132 | 68.1% | D+36.3 |
| OH-10 | DEM | 287,212 | 60.0% | D+26.4 | |
| OH-11 | DEM | 222,371 | 100.0% | D+100.0 | |
| OH-12 | REP | 321,046 | 62.0% | R+23.9 | |
| OH-13 | DEM | 298,094 | 67.4% | D+34.9 | |
| OH-14 | REP | 321,366 | 62.8% | R+25.5 | |
| OH-15 | REP | 277,435 | 60.0% | R+20.0 | |
| OH-16 | REP | 304,361 | 66.5% | R+33.1 | |
| OH-17 | Tim RyanDEM | DEM | 275,671 | 77.2% | D+54.4 |
| OH-18 | REP | 268,420 | 66.2% | R+32.3 |