| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | DEM | 237,425 | 67.0% | D+34.1 | |
| IL-02 | DEM | 209,175 | 67.1% | D+34.3 | |
| IL-03 | DEM | 177,759 | 68.5% | D+37.0 | |
| IL-04 | DEM | 133,047 | 68.4% | D+40.4 | |
| IL-05 | Mike QuigleyDEM | DEM | 274,550 | 69.6% | D+40.8 |
| IL-06 | Sean CastenDEM | DEM | 276,859 | 54.4% | D+8.7 |
| IL-07 | DEM | 167,746 | 99.9% | D+99.9 | |
| IL-08 | DEM | 207,215 | 56.9% | D+13.8 | |
| IL-09 | DEM | 250,530 | 71.7% | D+43.4 | |
| IL-10 | DEM | 242,165 | 63.0% | D+26.0 | |
| IL-11 | Bill FosterDEM | DEM | 264,241 | 56.5% | D+12.9 |
| IL-12 | Mike BostREP | REP | 291,171 | 75.0% | R+50.0 |
| IL-13 | DEM | 250,450 | 56.6% | D+13.2 | |
| IL-14 | DEM | 236,600 | 54.2% | D+8.3 | |
| IL-15 | REP | 299,403 | 71.1% | R+42.3 | |
| IL-16 | Darin LahoodREP | REP | 297,946 | 66.3% | R+32.7 |
| IL-17 | DEM | 233,123 | 52.0% | D+4.0 |