United States House of Representatives elections, 1864 Ohio Ohio

| District | Incumbent | Party | First_elected | Result_ |
|---|---|---|---|---|
| Ohio 1 | George H. Pendleton | Democratic | 1856 | Retired Republican gain |
| Ohio 2 | Alexander Long | Democratic | 1862 | Lost re-nomination Republican gain |
| Ohio 3 | Robert C. Schenck | Republican | 1862 | Re-elected |
| Ohio 4 | John F. McKinney | Democratic | 1862 | Lost re-election Republican gain |
| Ohio 5 | Francis C. Le Blond | Democratic | 1862 | Re-elected |
| Ohio 6 | Chilton A. White | Democratic | 1860 | Lost re-election Republican gain |
| Ohio 7 | Samuel S. Cox | Democratic | 1862 | Lost re-election Republican gain |
| Ohio 8 | William Johnston | Democratic | 1862 | Lost re-election Republican gain |
| Ohio 9 | Warren P. Noble | Democratic | 1860 | Lost re-election Republican gain |
| Ohio 10 | James M. Ashley | Republican | 1862 | Re-elected |