| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | DEM | 126,948 | 96.4% | D+92.8 | |
| IL-02 | Gus SavageDEM | DEM | 118,417 | 83.8% | D+67.7 |
| IL-03 | DEM | 155,567 | 66.2% | D+32.4 | |
| IL-04 | John H DavisREP | REP | 119,356 | 51.6% | R+3.2 |
| IL-05 | DEM | 117,204 | 70.4% | D+40.7 | |
| IL-06 | Henry J HydeREP | REP | 130,260 | 75.4% | R+50.8 |
| IL-07 | DEM | 113,164 | 80.2% | D+61.6 | |
| IL-08 | DEM | 105,256 | 78.7% | D+57.5 | |
| IL-09 | DEM | 129,453 | 71.6% | D+43.3 | |
| IL-10 | REP | 116,520 | 75.1% | R+50.2 | |
| IL-11 | DEM | 151,311 | 70.7% | D+41.4 | |
| IL-12 | REP | 114,580 | 77.7% | R+55.4 | |
| IL-13 | REP | 146,101 | 73.4% | R+46.8 | |
| IL-14 | REP | 147,581 | 52.4% | R+4.7 | |
| IL-15 | REP | 115,284 | 100.0% | R+100.0 | |
| IL-16 | REP | 139,069 | 66.9% | R+33.7 | |
| IL-17 | Lane EvansDEM | DEM | 153,543 | 55.6% | D+11.3 |
| IL-18 | REP | 150,639 | 62.6% | R+25.2 | |
| IL-19 | DEM | 167,291 | 66.4% | D+32.8 | |
| IL-20 | DEM | 185,847 | 68.1% | D+36.2 | |
| IL-21 | Melvin PriceDEM | DEM | 130,501 | 50.4% | D+0.7 |
| IL-22 | DEM | 183,318 | 53.2% | D+6.5 |