| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | DEM | 170,878 | 96.0% | D+92.1 | |
| IL-02 | Gus SavageDEM | DEM | 167,087 | 82.7% | D+65.5 |
| IL-03 | DEM | 212,292 | 62.2% | D+24.5 | |
| IL-04 | DEM | 181,525 | 50.3% | D+0.6 | |
| IL-05 | DEM | 152,695 | 61.3% | D+22.6 | |
| IL-06 | Henry J HydeREP | REP | 208,229 | 73.7% | R+47.4 |
| IL-07 | DEM | 135,331 | 100.0% | D+100.0 | |
| IL-08 | DEM | 144,324 | 74.6% | D+50.6 | |
| IL-09 | DEM | 205,187 | 66.1% | D+33.1 | |
| IL-10 | REP | 218,706 | 72.5% | R+45.0 | |
| IL-11 | DEM | 204,242 | 64.5% | D+29.0 | |
| IL-12 | REP | 220,682 | 75.2% | R+50.4 | |
| IL-13 | REP | 249,416 | 70.2% | R+40.3 | |
| IL-14 | REP | 218,628 | 73.7% | R+47.4 | |
| IL-15 | REP | 195,431 | 71.7% | R+43.5 | |
| IL-16 | REP | 200,796 | 63.9% | R+27.9 | |
| IL-17 | Lane EvansDEM | DEM | 203,690 | 64.9% | D+29.7 |
| IL-18 | REP | 209,221 | 54.7% | R+9.4 | |
| IL-19 | DEM | 206,870 | 64.2% | D+28.5 | |
| IL-20 | DEM | 222,644 | 68.9% | D+37.8 | |
| IL-21 | DEM | 201,221 | 52.6% | D+5.2 | |
| IL-22 | DEM | 214,854 | 64.9% | D+29.8 |