| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | DEM | 177,462 | 97.3% | D+94.6 | |
| IL-02 | Gus SavageDEM | DEM | 161,794 | 87.0% | D+74.3 |
| IL-03 | DEM | 185,659 | 74.0% | D+48.0 | |
| IL-04 | REP | 146,172 | 54.6% | R+9.3 | |
| IL-05 | DEM | 146,322 | 75.4% | D+50.8 | |
| IL-06 | Henry J HydeREP | REP | 143,168 | 68.4% | R+36.8 |
| IL-07 | DEM | 154,974 | 86.5% | D+72.9 | |
| IL-08 | DEM | 148,985 | 83.4% | D+66.9 | |
| IL-09 | DEM | 171,529 | 66.5% | D+34.5 | |
| IL-10 | REP | 153,868 | 59.0% | R+18.0 | |
| IL-11 | DEM | 185,722 | 72.6% | D+45.1 | |
| IL-12 | REP | 130,701 | 66.2% | R+35.5 | |
| IL-13 | REP | 162,530 | 69.8% | R+39.6 | |
| IL-14 | Tom CorcoranREP | REP | 152,180 | 64.6% | R+29.1 |
| IL-15 | REP | 158,344 | 66.3% | R+32.7 | |
| IL-16 | REP | 156,287 | 57.2% | R+14.4 | |
| IL-17 | Lane EvamsDEM | DEM | 178,887 | 52.8% | D+5.7 |
| IL-18 | REP | 188,694 | 51.6% | R+3.3 | |
| IL-19 | REP | 182,064 | 52.1% | R+4.2 | |
| IL-20 | DEM | 200,109 | 50.4% | D+0.7 | |
| IL-21 | Melvin PriceDEM | DEM | 140,608 | 63.6% | D+30.4 |
| IL-22 | Paul SimonDEM | DEM | 186,972 | 66.2% | D+32.3 |