| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | DEM | 125,223 | 95.5% | D+91.0 | |
| IL-02 | Gus SavageDEM | DEM | 147,302 | 88.1% | D+76.3 |
| IL-03 | DEM | 199,240 | 68.9% | D+37.8 | |
| IL-04 | REP | 224,192 | 68.0% | R+35.9 | |
| IL-05 | John G FaryDEM | DEM | 133,279 | 79.6% | D+59.3 |
| IL-06 | Henry J HydeREP | REP | 184,550 | 67.0% | R+33.9 |
| IL-07 | DEM | 94,097 | 85.1% | D+70.2 | |
| IL-08 | DEM | 116,373 | 84.7% | D+69.3 | |
| IL-09 | DEM | 145,788 | 73.1% | D+46.2 | |
| IL-10 | REP | 226,733 | 60.7% | R+21.5 | |
| IL-11 | DEM | 173,587 | 69.8% | D+39.6 | |
| IL-12 | REP | 249,818 | 74.1% | R+48.2 | |
| IL-13 | REP | 183,458 | 71.7% | R+43.3 | |
| IL-14 | REP | 263,828 | 76.8% | R+53.6 | |
| IL-15 | Tom CorcoranREP | REP | 196,619 | 76.8% | R+53.5 |
| IL-16 | REP | 197,147 | 67.4% | R+34.8 | |
| IL-17 | REP | 191,111 | 65.8% | R+31.7 | |
| IL-18 | REP | 202,043 | 62.1% | R+24.3 | |
| IL-19 | REP | 194,369 | 73.4% | R+46.8 | |
| IL-20 | Paul FindleyREP | REP | 220,377 | 56.0% | R+12.0 |
| IL-21 | REP | 195,662 | 67.6% | R+35.1 | |
| IL-22 | REP | 212,079 | 68.8% | R+37.7 | |
| IL-23 | Melvin PriceDEM | DEM | 167,430 | 64.4% | D+28.8 |
| IL-24 | Paul SimonDEM | DEM | 228,296 | 49.1% | D+0.9 |