! | William Allen | | Democratic | 1858 | Incumbent re-elected. | nowrap | |- ! | James M. Ashley | | Republican | 1858 | Incumbent re-elected. | nowrap | |- ! | William Howard | | Democratic | 1858 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- ! | Thomas Corwin | | Republican | 1858 | Incumbent re-elected. | nowrap | |- ! | Benjamin Stanton | | Republican | 1854 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | John Carey | | Republican | 1858 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | Carey A. Trimble | | Republican | 1858 | Incumbent re-elected. | nowrap | |- ! | Charles D. Martin | | Democratic | 1858 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | Samuel S. Cox | | Democratic | 1856 | Incumbent re-elected. | nowrap | |- ! | John Sherman | | Republican | 1854 | Incumbent re-elected. | nowrap | |- ! | Harrison G. O. Blake | | Republican | | Incumbent re-elected. | nowrap | |- ! | William Helmick | | Republican | 1858 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | Cydnor B. Tompkins | | Republican | 1856 | | Incumbent lost renomination.New member elected.Republican hold. | nowrap | |- ! | Thomas C. Theaker | | Republican | 1858 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | Sidney Edgerton | | Republican | 1858 | Incumbent re-elected. | nowrap | |- ! | Edward Wade | | Republican | 1852 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | John Hutchins | | Republican | 1858 | Incumbent re-elected. | nowrap | |- ! | John A. Bingham | | Republican | 1854 | Incumbent re-elected. | nowrap | |} Oregon Poorly coordinated state legislation created confusion. As a result, two elections were held in 1860: on June 4 (won by George K. Shiel and on November 6 (won by Andrew J. Thayer). Thayer was seated March 4, 1861, but Shiel contested the election. On July 30, 1861, the House Elections Committee seated the Shiel for the rest of the term ending March 3, 1863. Both disputants