| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| OH-01 | Steve ChabotREP | REP | 220,428 | 53.0% | R+8.4 |
| OH-02 | Rob PortmanREP | REP | 277,541 | 73.6% | R+50.5 |
| OH-03 | Tony P HallDEM | DEM | 214,247 | 83.0% | D+83.0 |
| OH-04 | REP | 232,118 | 67.4% | R+38.4 | |
| OH-05 | REP | 243,340 | 69.8% | R+44.3 | |
| OH-06 | DEM | 240,574 | 57.7% | D+17.4 | |
| OH-07 | REP | 242,186 | 67.6% | R+42.5 | |
| OH-08 | REP | 253,303 | 71.0% | R+44.8 | |
| OH-09 | Marcy KapturDEM | DEM | 225,328 | 74.8% | D+52.9 |
| OH-10 | DEM | 222,755 | 75.0% | D+53.0 | |
| OH-11 | DEM | 193,519 | 84.8% | D+73.6 | |
| OH-12 | REP | 263,386 | 52.9% | R+9.0 | |
| OH-13 | DEM | 263,298 | 64.6% | D+32.6 | |
| OH-14 | DEM | 230,088 | 64.8% | D+33.8 | |
| OH-15 | REP | 232,297 | 67.5% | R+39.6 | |
| OH-16 | REP | 234,400 | 69.2% | R+42.5 | |
| OH-17 | DEM | 240,877 | 50.0% | D+27.2 | |
| OH-18 | REP | 236,505 | 64.4% | R+30.9 | |
| OH-19 | REP | 318,848 | 64.8% | R+32.9 |