hold. | nowrap | |- ! | William B. Maclay | | Democratic | 1856 | | Incumbent retired.New member elected.Republican gain. | nowrap | |- ! | John Cochrane | | Democratic | 1856 | | Incumbent lost renomination.New member elected.Republican gain. | nowrap | |- ! | George Briggs | | Republican | 1858 | | Incumbent retired.New member elected.Democratic gain. | nowrap | |- ! | Horace F. Clark | | Anti-Lecompton Democratic | 1856 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- ! | John B. Haskin | | Anti-Lecompton Democratic | 1856 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- ! | Charles Van Wyck | | Republican | 1858 | Incumbent re-elected. | nowrap | |- ! | William S. Kenyon | | Republican | 1858 | | Incumbent retired.New member elected.Democratic gain. | nowrap | |- ! | Charles Lewis Beale | | Republican | 1858 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | Abram B. Olin | | Republican | 1856 | Incumbent re-elected. | nowrap | |- ! | John H. Reynolds | | Anti-Lecompton Democratic | 1858 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- ! | James B. McKean | | Republican | 1858 | Incumbent re-elected. | nowrap | |- ! | George W. Palmer | | Republican | 1856 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | Francis E. Spinner | | Republican | 1854 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | Clark B. Cochrane | | Republican | 1856 | | Incumbent retired.New member elected.Democratic gain. | nowrap | |- ! | James H. Graham | | Republican | 1858 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | Roscoe Conkling | | Republican | 1858 | Incumbent re-elected. | nowrap | |- ! | R. Holland Duell | | Republican | 1858 | Incumbent re-elected. | nowrap | |- ! | M. Lindley Lee | | Republican | 1858 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | Charles B. Hoard | | Republican | 1856 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | Charles B. Sedgwick | | Republican | 1858 | Incumbent re-elected. | nowrap