| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | Bobby L RushDEM | DEM | 315,862 | 74.1% | D+48.2 |
| IL-02 | DEM | 294,522 | 79.8% | D+59.6 | |
| IL-03 | DEM | 225,411 | 100.0% | D+100.0 | |
| IL-04 | DEM | 171,297 | 100.0% | D+100.0 | |
| IL-05 | Mike QuigleyDEM | DEM | 313,724 | 67.8% | D+40.4 |
| IL-06 | REP | 352,146 | 59.2% | R+18.4 | |
| IL-07 | DEM | 297,466 | 84.2% | D+68.5 | |
| IL-08 | DEM | 248,571 | 58.3% | D+16.6 | |
| IL-09 | DEM | 326,948 | 66.5% | D+33.0 | |
| IL-10 | DEM | 285,996 | 52.6% | D+5.2 | |
| IL-11 | Bill FosterDEM | DEM | 275,573 | 60.5% | D+20.9 |
| IL-12 | Mike BostREP | REP | 313,002 | 54.3% | R+14.6 |
| IL-13 | Rodney DavisREP | REP | 314,394 | 59.7% | R+19.3 |
| IL-14 | REP | 338,097 | 59.3% | R+18.6 | |
| IL-15 | REP | 274,554 | 100.0% | R+100.0 | |
| IL-16 | REP | 259,853 | 100.0% | R+100.0 | |
| IL-17 | Cheri BustosDEM | DEM | 287,068 | 60.3% | D+20.6 |
| IL-18 | Darin LahoodREP | REP | 347,283 | 72.1% | R+44.3 |