| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | Bobby L RushDEM | DEM | 174,427 | 84.1% | D+68.1 |
| IL-02 | DEM | 172,490 | 84.8% | D+73.0 | |
| IL-03 | DEM | 165,722 | 77.1% | D+54.2 | |
| IL-04 | DEM | 81,442 | 85.8% | D+71.7 | |
| IL-05 | Rahm EmanuelDEM | DEM | 146,581 | 78.0% | D+56.0 |
| IL-06 | REP | 177,957 | 51.4% | R+2.7 | |
| IL-07 | DEM | 165,011 | 86.7% | D+73.4 | |
| IL-08 | DEM | 183,394 | 50.9% | D+6.9 | |
| IL-09 | DEM | 164,713 | 74.6% | D+49.2 | |
| IL-10 | REP | 202,208 | 53.4% | R+6.8 | |
| IL-11 | REP | 197,855 | 55.1% | R+10.2 | |
| IL-12 | DEM | 157,291 | 100.0% | D+100.0 | |
| IL-13 | Judy BiggertREP | REP | 205,234 | 58.3% | R+16.7 |
| IL-14 | REP | 197,144 | 59.8% | R+19.6 | |
| IL-15 | REP | 202,835 | 57.6% | R+15.2 | |
| IL-16 | REP | 197,493 | 63.5% | R+31.4 | |
| IL-17 | Phil HareDEM | DEM | 201,186 | 57.2% | D+14.3 |
| IL-18 | Ray LahoodREP | REP | 223,246 | 67.3% | R+34.5 |
| IL-19 | REP | 236,352 | 60.7% | R+21.4 |