| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | DEM | 107,598 | 93.8% | D+87.5 | |
| IL-02 | Gus SavageDEM | DEM | 102,595 | 78.2% | D+56.4 |
| IL-03 | DEM | 155,811 | 70.9% | D+41.9 | |
| IL-04 | DEM | 130,548 | 59.2% | D+18.4 | |
| IL-05 | DEM | 111,246 | 66.3% | D+35.4 | |
| IL-06 | Henry J HydeREP | REP | 144,565 | 66.7% | R+33.4 |
| IL-07 | DEM | 100,120 | 79.9% | D+59.9 | |
| IL-08 | DEM | 88,680 | 79.1% | D+79.1 | |
| IL-09 | DEM | 135,588 | 71.2% | D+42.4 | |
| IL-10 | REP | 153,599 | 67.8% | R+37.0 | |
| IL-11 | DEM | 154,245 | 53.6% | D+9.0 | |
| IL-12 | REP | 137,531 | 82.2% | R+82.2 | |
| IL-13 | REP | 176,353 | 65.8% | R+31.6 | |
| IL-14 | REP | 167,975 | 66.9% | R+33.8 | |
| IL-15 | REP | 119,822 | 100.0% | R+100.0 | |
| IL-16 | DEM | 152,166 | 54.6% | D+9.2 | |
| IL-17 | Lane EvansDEM | DEM | 153,442 | 66.5% | D+33.0 |
| IL-18 | REP | 107,370 | 98.4% | R+98.4 | |
| IL-19 | DEM | 171,888 | 66.3% | D+33.9 | |
| IL-20 | DEM | 196,547 | 66.2% | D+32.4 | |
| IL-21 | DEM | 144,157 | 66.0% | D+32.1 | |
| IL-22 | DEM | 165,321 | 83.7% | D+83.7 |