| Adam M. Byrd | | Democratic | 1902 | | Incumbent lost renomination.New member elected.Democratic hold. | nowrap | |- ! | Eaton J. Bowers | | Democratic | 1902 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- ! | William A. Dickson | | Democratic | 1908 | Incumbent re-elected. | nowrap | |- ! | James Collier | | Democratic | 1908 | Incumbent re-elected. | nowrap | |} Missouri Montana |- ! | Charles N. Pray | | Republican | 1906 | Incumbent re-elected. | nowrap | |} Nebraska |- ! | John A. Maguire | | Democratic | 1908 | Incumbent re-elected. | nowrap | |- ! | Gilbert Hitchcock | | Democratic | 1906 | | Incumbent retired to run for U.S. senator.New member elected.Democratic hold. | nowrap | |- ! | James P. Latta | | Democratic | 1908 | Incumbent re-elected. | nowrap | |- ! | Edmund H. Hinshaw | | Republican | 1902 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | George W. Norris | | Republican | 1902 | Incumbent re-elected. | nowrap | |- ! | Moses Kinkaid | | Republican | 1902 | Incumbent re-elected. | nowrap | |} Nevada New Hampshire New Jersey New York North Carolina North Dakota |- ! rowspan=2 | | Louis B. Hanna | | Republican | nowrap | 1908 | Incumbent re-elected. | nowrap rowspan=2 | |- | Asle Gronna | | Republican | nowrap | 1904 | | Incumbent retired to run for U.S. senator.New member elected.Republican hold. |} Ohio Oklahoma |- ! | Bird S. McGuire | | 1907 | Incumbent re-elected. | nowrap | |- ! | Dick T. Morgan | | 1908 | Incumbent re-elected. | nowrap | |- ! | Charles E. Creager | | 1908 | | Incumbent lost re-election.New member elected.Democratic gain. | nowrap | |- ! | Charles D. Carter | | 1907 | Incumbent re-elected. | nowrap | |- ! | Scott Ferris | | 1907 | Incumbent re-elected. | nowrap | |} Oregon |- ! | Willis C. Hawley | | Republican | 1906 | Incumbent re-elected. | nowrap | |- ! | William R. Ellis | | Republican | 1906 | | Incumbent lost renomination.New member elected.Republican hold. | nowrap | |} Pennsylvania Rhode Island South Carolina South Dakota |- ! rowspan=2