| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | Bobby L RushDEM | DEM | 184,386 | 80.4% | D+64.5 |
| IL-02 | DEM | 187,113 | 80.5% | D+66.7 | |
| IL-03 | DEM | 166,627 | 69.7% | D+45.4 | |
| IL-04 | DEM | 81,792 | 77.4% | D+63.0 | |
| IL-05 | Mike QuigleyDEM | DEM | 153,435 | 70.6% | D+45.3 |
| IL-06 | REP | 179,835 | 63.6% | R+27.3 | |
| IL-07 | DEM | 183,849 | 81.5% | D+65.4 | |
| IL-08 | Joe WalshREP | REP | 202,435 | 48.5% | R+0.1 |
| IL-09 | DEM | 177,207 | 66.3% | D+35.2 | |
| IL-10 | REP | 215,232 | 51.1% | R+2.2 | |
| IL-11 | REP | 225,127 | 57.4% | R+14.7 | |
| IL-12 | DEM | 202,705 | 59.8% | D+23.3 | |
| IL-13 | Judy BiggertREP | REP | 238,413 | 63.8% | R+27.6 |
| IL-14 | REP | 219,013 | 51.3% | R+6.3 | |
| IL-15 | REP | 212,863 | 64.3% | R+28.6 | |
| IL-16 | REP | 212,761 | 65.0% | R+34.0 | |
| IL-17 | REP | 198,898 | 52.6% | R+9.6 | |
| IL-18 | Aaron SchockREP | REP | 221,170 | 69.1% | R+43.3 |
| IL-19 | REP | 233,298 | 71.2% | R+42.5 |