United States House of Representatives elections, 1864 Ohio Ohio

| District | Incumbent | Party | First_elected | Result_ |
|---|---|---|---|---|
| Ohio 11 | Wells A. Hutchins | Democratic | 1862 | Lost re-election Republican gain |
| Ohio 12 | William E. Finck | Democratic | 1862 | Re-elected |
| Ohio 13 | John O`Neill | Democratic | 1862 | Retired Republican gain |
| Ohio 14 | George Bliss | Democratic | 1862 | Lost re-election Republican gain |
| Ohio 15 | James R. Morris | Democratic | 1862 | Lost re-election Republican gain |
| Ohio 16 | Joseph W. White | Democratic | 1882 | Lost re-election Republican gain |
| Ohio 17 | Ephraim R. Eckley | Republican | 1862 | Re-elected |
| Ohio 18 | Rufus P. Spalding | Republican | 1862 | Re-elected |
| Ohio 19 | James A. Garfield | Republican | 1862 | Re-elected |