| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| IL-01 | Bobby L RushDEM | DEM | 249,949 | 84.9% | D+69.7 |
| IL-02 | DEM | 234,525 | 88.5% | D+88.5 | |
| IL-03 | DEM | 229,956 | 72.6% | D+47.5 | |
| IL-04 | DEM | 125,142 | 83.7% | D+71.3 | |
| IL-05 | Rahm EmanuelDEM | DEM | 207,930 | 76.2% | D+52.4 |
| IL-06 | Henry J HydeREP | REP | 250,097 | 55.8% | R+11.7 |
| IL-07 | DEM | 256,736 | 86.1% | D+72.3 | |
| IL-08 | DEM | 270,393 | 51.7% | D+3.4 | |
| IL-09 | DEM | 231,417 | 75.7% | D+51.5 | |
| IL-10 | REP | 276,711 | 64.1% | R+28.3 | |
| IL-11 | REP | 294,960 | 58.7% | R+17.3 | |
| IL-12 | DEM | 286,435 | 69.5% | D+40.6 | |
| IL-13 | Judy BiggertREP | REP | 308,312 | 65.0% | R+30.1 |
| IL-14 | REP | 279,208 | 68.6% | R+37.3 | |
| IL-15 | REP | 291,739 | 61.0% | R+22.1 | |
| IL-16 | REP | 295,806 | 69.1% | R+38.2 | |
| IL-17 | Lane EvansDEM | DEM | 284,000 | 60.7% | D+21.4 |
| IL-18 | Ray LahoodREP | REP | 307,595 | 70.2% | R+40.5 |
| IL-19 | REP | 307,754 | 69.4% | R+38.7 |