United States House of Representatives elections, 1866
Ohio
Columns: District | Incumbent | Party | First elected | Result
Ohio 1 | Benjamin Eggleston | Republican | 1864 | Re-elected | Ohio 2 | Rutherford B. Hayes | Republican | 1864 | Re-elected | Ohio 3 | Robert C. Schenck | Republican | 1862 | Re-elected | Ohio 4 | William Lawrence | Republican | 1864 | Re-elected | Ohio 5 | Francis C. Le Blond | Democratic | 1862 | Retired Democratic hold | Ohio 6 | Reader W. Clarke | Republican | 1864 | Re-elected | Ohio 7 | Samuel Shellabarger | Republican | 1864 | Re-elected | Ohio 8 | James Randolph Hubbell | Republican | 1864 | Retired Republican hold | Ohio 9 | Ralph P. Buckland | Republican | 1864 | Re-elected | Ohio 10 | James M. Ashley | Republican | 1862 | Re-elected | Ohio 11 | Hezekiah S. Bundy | Republican | 1864 | Retired Republican hold | Ohio 12 | William E. Finck | Democratic | 1862 | Retired Democratic hold | Ohio 13 | Columbus Delano | Republican | 1864 | Lost Re-election Democratic gain | Ohio 14 | Martin Welker | Republican | 1864 | Re-elected | Ohio 15 | Tobias A. Plants | Republican | 1864 | Re-elected | Ohio 16 | John Bingham | Republican | 1864 | Re-elected | 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