| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | Bobby L RushDEM | DEM | 222,017 | 73.1% | D+46.2 |
| IL-02 | DEM | 204,266 | 78.5% | D+57.0 | |
| IL-03 | DEM | 180,855 | 64.6% | D+29.1 | |
| IL-04 | DEM | 101,944 | 78.2% | D+56.3 | |
| IL-05 | Mike QuigleyDEM | DEM | 184,019 | 63.2% | D+32.6 |
| IL-06 | REP | 238,752 | 67.1% | R+34.3 | |
| IL-07 | DEM | 182,278 | 85.1% | D+70.2 | |
| IL-08 | DEM | 151,056 | 55.7% | D+11.4 | |
| IL-09 | DEM | 213,450 | 66.1% | D+32.1 | |
| IL-10 | REP | 187,128 | 51.3% | R+2.6 | |
| IL-11 | Bill FosterDEM | DEM | 174,772 | 53.5% | D+6.9 |
| IL-12 | Mike BostREP | REP | 209,738 | 52.5% | R+10.6 |
| IL-13 | Rodney DavisREP | REP | 210,272 | 58.7% | R+17.3 |
| IL-14 | REP | 222,230 | 65.4% | R+30.8 | |
| IL-15 | REP | 221,926 | 74.9% | R+49.9 | |
| IL-16 | REP | 217,198 | 70.6% | R+41.2 | |
| IL-17 | Cheri BustosDEM | DEM | 199,361 | 55.5% | D+10.9 |
| IL-18 | Aaron SchockREP | REP | 246,740 | 74.7% | R+49.4 |