United States House of Representatives elections, 1978 Illinois Illinois

| District | Incumbent | Party | First_elected | Result_ | Candidates |
|---|---|---|---|---|---|
| Illinois 3 | Marty Russo | Democratic | 1974 | Re-elected | Marty Russo (D) 65.2% Robert L. Dunne (R) 34.8% |
| Illinois 4 | Ed Derwinski | Republican | 1958 | Re-elected | Ed Derwinski (R) 66.9% Andrew Thomas (D) 33.1% |
| Illinois 6 | Henry Hyde | Republican | 1974 | Re-elected | Henry Hyde (R) 66.2% Jeanne P. Quinn (D) 33.8% |
| Illinois 7 | Cardiss Collins | Democratic | 1973 | Re-elected | Cardiss Collins (D) 86.3% James C. Holt (R) 13.7% |
| Illinois 10 | Abner J. Mikva | Democratic | 1974 | Re-elected | Abner J. Mikva (D) 50.2% John E. Porter (R) 49.8% |
| Illinois 11 | Frank Annunzio | Democratic | 1964 | Re-elected | Frank Annunzio (D) 73.7% John Hoeger (R) 26.3% |