Ohio elected its members October 12, 1858, netting a 3-seat Republican gain.
District Incumbent Party Firstelected Result Candidates George H. Pendleton Democratic 1856 Incumbent re-elected. William S. Groesbeck Democratic 1856 Incumbent lost re-election.New member elected.Republican gain. Clement L. Vallandigham Democratic 1856 Incumbent re-elected. Matthias H. Nichols Republican 1852 Incumbent lost re-election.New member elected.Democratic gain. Richard Mott Republican 1854 Incumbent retired.New member elected.Republican hold. Joseph R. Cockerill Democratic 1856 Incumbent retired.New member elected.Democratic hold. Aaron Harlan Republican 1852 Incumbent lost renomination.New member elected.Republican hold. Benjamin Stanton Republican 1854 Incumbent re-elected. Lawrence W. Hall Democratic 1856 Incumbent lost re-election.New member elected.Republican gain. Joseph Miller Democratic 1856 Incumbent lost re-election.New member elected.Republican gain. Albert C. Thompson Republican 1854 Incumbent retired.New member elected.Democratic gain. Samuel S. Cox Democratic 1856 Incumbent re-elected. John Sherman Republican 1854 Incumbent re-elected. Philemon Bliss Republican 1854 Incumbent retired.New member elected.Republican hold.Successor died May 31, 1859, leading to a special election. Joseph Burns Democratic 1856 Incumbent lost re-election.New member elected.Republican gain. Cydnor B. Tompkins Republican 1856 Incumbent re-elected. William Lawrence Democratic 1856 Incumbent retired.New member elected.Republican gain. Benjamin F. Leiter Republican 1854 Incumbent retired.New member elected.Republican hold. Edward Wade Republican 1852 Incumbent re-elected. Joshua Reed Giddings Republican 1843 Incumbent lost renomination.New member elected.Republican hold. John Bingham Republican 1854 Incumbent re-elected.
See also 1859 Ohio's 14th congressional district special election 1858 and 1859 United States House of Representatives elections List of United States representatives from Ohio
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