United States House of Representatives elections, 1974 Illinois Illinois

| District | Incumbent | Party | First_elected | Result_ | Candidates |
|---|---|---|---|---|---|
| Illinois 3 | Robert P. Hanrahan | Republican | 1972 | Lost re-election Democratic gain | Marty Russo (D) 52.6% Robert P. Hanrahan (R) 47.4% |
| Illinois 4 | Ed Derwinski | Republican | 1958 | Re-elected | Ed Derwinski (R) 59.2% Ronald A. Rodger (D) 40.8% |
| Illinois 6 | Harold R. Collier | Republican | 1956 | Retired Republican hold | Henry Hyde (R) 53.4% Edward V. Hanrahan (D) 46.6% |
| Illinois 9 | Sidney R. Yates | Democratic | 1964 | Re-elected | Sidney R. Yates (D) Unopposed |
| Illinois 10 | Samuel H. Young | Republican | 1972 | Lost re-election Democratic gain | Abner J. Mikva (D) 50.9% Samuel H. Young (R) 49.1% |