United States House of Representatives elections, 1966 Indiana Indiana

| District | Incumbent | Party | First_elected | Result_ | Candidates |
|---|---|---|---|---|---|
| Indiana 1 | Ray J. Madden | Democratic | 1942 | Re-elected | Ray J. Madden (D) 58.3% Albert Harrigan (R) 41.7% |
| Indiana 3 | John Brademas | Democratic | 1958 | Re-elected | John Brademas (D) 55.8% Robert A. Ehlers (R) 44.2% |
| Indiana 4 | E. Ross Adair | Republican | 1950 | Re-elected | E. Ross Adair (R) 63.5% J. Byron Hayes (D) 36.5% |
| Indiana 5 | J. Edward Roush | Democratic | 1958 | Re-elected | J. Edward Roush (D) 51.1% Kenneth Bowman (R) 48.9% |
| Indiana 7 | None (District created) | None (District created) | None (District created) | New seat Republican gain | John T. Myers (R) 54.3% Elden C. Tipton (D) 45.7% |