| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | DEM | 185,534 | 95.6% | D+95.6 | |
| IL-02 | Gus SavageDEM | DEM | 187,215 | 83.0% | D+66.0 |
| IL-03 | DEM | 222,582 | 64.4% | D+28.8 | |
| IL-04 | REP | 190,291 | 64.0% | R+28.0 | |
| IL-05 | DEM | 167,708 | 63.6% | D+27.1 | |
| IL-06 | Henry J HydeREP | REP | 209,562 | 75.1% | R+50.2 |
| IL-07 | DEM | 172,908 | 78.4% | D+56.7 | |
| IL-08 | DEM | 160,417 | 71.3% | D+42.6 | |
| IL-09 | DEM | 214,495 | 67.5% | D+35.1 | |
| IL-10 | REP | 211,140 | 72.6% | R+45.2 | |
| IL-11 | DEM | 220,690 | 62.6% | D+25.2 | |
| IL-12 | REP | 205,119 | 77.8% | R+55.6 | |
| IL-13 | REP | 235,234 | 67.0% | R+34.0 | |
| IL-14 | REP | 218,738 | 62.2% | R+24.3 | |
| IL-15 | REP | 203,613 | 73.2% | R+46.5 | |
| IL-16 | REP | 218,538 | 58.4% | R+16.9 | |
| IL-17 | Lane EvansDEM | DEM | 226,345 | 56.7% | D+13.3 |
| IL-18 | REP | 223,106 | 61.0% | R+22.1 | |
| IL-19 | DEM | 225,103 | 52.3% | D+4.5 | |
| IL-20 | DEM | 236,821 | 61.3% | D+22.5 | |
| IL-21 | Melvin PriceDEM | DEM | 211,194 | 60.2% | D+20.3 |
| IL-22 | DEM | 232,728 | 50.3% | D+0.5 |