| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | DEM | 81,279 | 58.5% | D+17.3 | |
| IL-02 | DEM | 94,077 | 86.0% | D+74.2 | |
| IL-03 | DEM | 146,800 | 65.2% | D+30.4 | |
| IL-04 | REP | 141,229 | 66.9% | R+33.7 | |
| IL-05 | John G FaryDEM | DEM | 117,506 | 84.0% | D+68.0 |
| IL-06 | Henry J HydeREP | REP | 131,737 | 66.2% | R+32.4 |
| IL-07 | DEM | 74,989 | 86.3% | D+72.6 | |
| IL-08 | DEM | 94,762 | 86.0% | D+71.9 | |
| IL-09 | DEM | 116,217 | 75.3% | D+50.7 | |
| IL-10 | DEM | 178,309 | 50.2% | D+0.4 | |
| IL-11 | DEM | 152,412 | 73.7% | D+47.5 | |
| IL-12 | REP | 138,935 | 79.5% | R+59.1 | |
| IL-13 | REP | 104,738 | 61.2% | R+22.3 | |
| IL-14 | REP | 158,179 | 75.1% | R+50.1 | |
| IL-15 | Tom CorcoranREP | REP | 129,612 | 62.4% | R+24.8 |
| IL-16 | REP | 117,309 | 65.4% | R+30.9 | |
| IL-17 | REP | 133,635 | 70.6% | R+41.2 | |
| IL-18 | REP | 130,514 | 65.9% | R+31.8 | |
| IL-19 | REP | 89,790 | 100.0% | R+100.0 | |
| IL-20 | Paul FindleyREP | REP | 159,480 | 69.6% | R+39.3 |
| IL-21 | REP | 124,527 | 78.3% | R+56.5 | |
| IL-22 | REP | 159,383 | 54.0% | R+8.0 | |
| IL-23 | Melvin PriceDEM | DEM | 100,105 | 74.2% | D+48.3 |
| IL-24 | Paul SimonDEM | DEM | 168,061 | 65.6% | D+31.3 |