| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| OH-01 | Steve ChabotREP | REP | 165,819 | 56.1% | R+12.2 |
| OH-02 | Rob PortmanREP | REP | 193,858 | 77.4% | R+54.9 |
| OH-03 | Tony P HallDEM | DEM | 177,656 | 59.3% | D+18.6 |
| OH-04 | REP | 139,841 | 100.0% | R+100.0 | |
| OH-05 | REP | 185,214 | 73.4% | R+46.7 | |
| OH-06 | REP | 179,124 | 51.0% | R+1.9 | |
| OH-07 | REP | 140,124 | 100.0% | R+100.0 | |
| OH-08 | REP | 148,425 | 99.9% | R+99.9 | |
| OH-09 | Marcy KapturDEM | DEM | 156,785 | 75.3% | D+50.7 |
| OH-10 | REP | 183,639 | 51.9% | R+13.2 | |
| OH-11 | Louis StokesDEM | DEM | 147,928 | 77.2% | D+54.4 |
| OH-12 | REP | 172,345 | 66.5% | R+33.3 | |
| OH-13 | DEM | 189,776 | 49.1% | D+3.5 | |
| OH-14 | DEM | 185,404 | 51.9% | D+3.9 | |
| OH-15 | REP | 159,696 | 70.7% | R+41.6 | |
| OH-16 | REP | 183,103 | 75.0% | R+50.0 | |
| OH-17 | DEM | 192,494 | 77.4% | D+54.8 | |
| OH-18 | REP | 191,041 | 54.0% | R+8.0 | |
| OH-19 | REP | 206,242 | 48.5% | R+5.0 |