United States House of Representatives elections, 1978 Illinois Illinois

| District | Incumbent | Party | First_elected | Result_ | Candidates |
|---|---|---|---|---|---|
| Illinois 12 | Phil Crane | Republican | 1969 | Re-elected | Phil Crane (R) 79.5% Gilbert Bogen (D) 20.5% |
| Illinois 15 | Tom Corcoran | Republican | 1976 | Re-elected | Tom Corcoran (R) 62.4% Tim Lee Hall (D) 37.6% |
| Illinois 19 | Tom Railsback | Republican | 1966 | Re-elected | Tom Railsback (R) Unopposed |
| Illinois 20 | Paul Findley | Republican | 1960 | Re-elected | Paul Findley (R) 69.6% Victor Roberts (D) 30.4% |
| Illinois 22 | George E. Shipley | Democratic | 1958 | Retired Republican gain | Dan Crane (R) 54.0% Terry L. Bruce (D) 46.0% |
| Illinois 23 | Melvin Price | Democratic | 1944 | Re-elected | Melvin Price (D) 74.2% Daniel J. Stack (R) 25.8% |