| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | Bobby L RushDEM | DEM | 183,656 | 81.2% | D+65.0 |
| IL-02 | DEM | 184,010 | 82.3% | D+64.6 | |
| IL-03 | DEM | 156,042 | 100.0% | D+100.0 | |
| IL-04 | DEM | 84,513 | 79.7% | D+64.6 | |
| IL-05 | Rahm EmanuelDEM | DEM | 159,435 | 66.8% | D+38.0 |
| IL-06 | Henry J HydeREP | REP | 173,872 | 65.1% | R+30.2 |
| IL-07 | DEM | 165,756 | 83.2% | D+68.0 | |
| IL-08 | REP | 165,926 | 57.4% | R+14.9 | |
| IL-09 | DEM | 168,836 | 70.3% | D+43.4 | |
| IL-10 | REP | 186,911 | 68.8% | R+37.6 | |
| IL-11 | REP | 193,085 | 64.3% | R+28.6 | |
| IL-12 | DEM | 190,020 | 69.3% | D+38.5 | |
| IL-13 | Judy BiggertREP | REP | 198,615 | 70.3% | R+40.5 |
| IL-14 | REP | 182,363 | 74.1% | R+48.3 | |
| IL-15 | REP | 206,617 | 65.2% | R+34.1 | |
| IL-16 | REP | 188,827 | 70.6% | R+41.2 | |
| IL-17 | Lane EvansDEM | DEM | 203,612 | 62.4% | D+24.8 |
| IL-18 | Ray LahoodREP | REP | 192,567 | 100.0% | R+100.0 |
| IL-19 | REP | 244,473 | 54.8% | R+9.6 |