| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | Bobby L RushDEM | DEM | 320,844 | 73.8% | D+47.6 |
| IL-02 | DEM | 297,712 | 63.3% | D+40.0 | |
| IL-03 | DEM | 246,398 | 68.5% | D+37.0 | |
| IL-04 | DEM | 160,509 | 83.0% | D+66.0 | |
| IL-05 | Mike QuigleyDEM | DEM | 270,377 | 65.7% | D+37.1 |
| IL-06 | REP | 326,129 | 59.2% | R+18.4 | |
| IL-07 | DEM | 286,435 | 84.6% | D+73.7 | |
| IL-08 | DEM | 225,066 | 54.7% | D+9.5 | |
| IL-09 | DEM | 293,807 | 66.3% | D+32.7 | |
| IL-10 | DEM | 264,454 | 50.6% | D+1.3 | |
| IL-11 | Bill FosterDEM | DEM | 254,295 | 58.6% | D+17.1 |
| IL-12 | DEM | 303,949 | 51.6% | D+8.9 | |
| IL-13 | Rodney DavisREP | REP | 294,385 | 46.5% | R+0.3 |
| IL-14 | REP | 301,954 | 58.8% | R+17.6 | |
| IL-15 | REP | 299,937 | 68.6% | R+37.2 | |
| IL-16 | REP | 294,090 | 61.8% | R+23.6 | |
| IL-17 | Cheri BustosDEM | DEM | 288,161 | 53.3% | D+6.6 |
| IL-18 | Aaron SchockREP | REP | 329,631 | 74.2% | R+48.3 |