| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | DEM | 137,193 | 92.3% | D+84.9 | |
| IL-02 | DEM | 150,335 | 84.7% | D+69.3 | |
| IL-03 | DEM | 196,365 | 58.9% | D+18.4 | |
| IL-04 | REP | 189,772 | 65.8% | R+31.6 | |
| IL-05 | John G FaryDEM | DEM | 155,092 | 77.0% | D+53.9 |
| IL-06 | Henry J HydeREP | REP | 176,027 | 60.6% | R+21.2 |
| IL-07 | DEM | 104,094 | 84.8% | D+69.5 | |
| IL-08 | DEM | 131,107 | 80.5% | D+61.1 | |
| IL-09 | DEM | 168,983 | 72.2% | D+44.3 | |
| IL-10 | DEM | 213,414 | 50.0% | D+0.1 | |
| IL-11 | DEM | 201,440 | 67.4% | D+34.8 | |
| IL-12 | REP | 208,553 | 72.8% | R+45.7 | |
| IL-13 | REP | 164,266 | 66.8% | R+36.5 | |
| IL-14 | REP | 236,588 | 74.4% | R+48.9 | |
| IL-15 | Tom CorcoranREP | REP | 190,231 | 53.9% | R+7.8 |
| IL-16 | REP | 168,328 | 67.9% | R+35.8 | |
| IL-17 | REP | 194,365 | 58.2% | R+16.4 | |
| IL-18 | REP | 187,130 | 57.7% | R+15.5 | |
| IL-19 | REP | 193,539 | 68.5% | R+37.0 | |
| IL-20 | Paul FindleyREP | REP | 215,857 | 63.6% | R+27.1 |
| IL-21 | REP | 184,035 | 74.5% | R+48.9 | |
| IL-22 | DEM | 210,289 | 61.4% | D+22.9 | |
| IL-23 | Melvin PriceDEM | DEM | 162,938 | 78.6% | D+57.3 |
| IL-24 | Paul SimonDEM | DEM | 226,110 | 67.4% | D+34.8 |