United States House of Representatives elections, 1970 Illinois Illinois

| District | Incumbent | Party | First_elected | Result_ | Candidates |
|---|---|---|---|---|---|
| Illinois 18 | Robert H. Michel | Republican | 1956 | Re-elected | Robert H. Michel (R) 66.1% Rosa Lee Fox (D) 33.9% |
| Illinois 19 | Tom Railsback | Republican | 1966 | Re-elected | Tom Railsback (R) 68.2% James L. Shaw (D) 31.8% |
| Illinois 20 | Paul Findley | Republican | 1960 | Re-elected | Paul Findley (R) 67.5% Billie M. Cox (D) 32.5% |
| Illinois 21 | Kenneth J. Gray | Democratic | 1954 | Re-elected | Kenneth J. Gray (D) 62.5% Fred Evans (R) 37.5% |