| William Rosecrans | | Democratic | 1880 | Incumbent re-elected. | nowrap | |- ! | Horace F. Page | | Republican | 1872 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | Campbell P. Berry | | Democratic | 1879 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- ! | Romualdo Pacheco | | Republican | 1876 | | Incumbent retired.New member elected.Democratic gain. | nowrap | |- ! rowspan=2 | | colspan=3 | None (New seat) | | New seat.New member elected.Democratic gain. | rowspan=2 nowrap | |- | colspan=3 | None (New seat) | | New seat.New member elected.Democratic gain. |} Colorado |- ! | James B. Belford | | 1878 | Incumbent re-elected. | nowrap | |} Connecticut |- ! | John R. Buck | | 1880 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | James Phelps | | 1875 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- ! | John T. Wait | | 1876 | Incumbent re-elected. | nowrap | |- ! | Frederick Miles | | 1878 | | Incumbent retired.New member elected.Democratic gain. | nowrap | |} Delaware |- ! | Edward L. Martin | | 1878 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |} Florida |- ! | Robert H. M. Davidson | | Democratic | 1876 | Incumbent re-elected. | nowrap | |- ! | Horatio Bisbee Jr. | | Republican | 1880 | Incumbent re-elected. | nowrap | |} Georgia |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Illinois |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Indiana |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Iowa |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Kansas |- ! | John A. Anderson | | 1878 | Incumbent re-elected. | nowrap | |- ! | Dudley C. Haskell |