| nowrap | |- ! | William M. Morgan | | Republican | 1920 | Incumbent re-elected. | nowrap | |- ! | B. Frank Murphy | | Republican | 1918 | Incumbent re-elected. | nowrap | |- ! | John G. Cooper | | Republican | 1914 | Incumbent re-elected. | nowrap | |- ! | Charles A. Mooney | | Democratic | 1922 | Incumbent re-elected. | nowrap | |- ! | Robert Crosser | | Democratic | 1922 | Incumbent re-elected. | nowrap | |- ! | Theodore E. Burton | | Republican | 1920 | | Incumbent retired to run for U.S. Senate.New member elected.Republican hold. | nowrap | |} Oklahoma |- ! | Everette B. Howard | | Democratic | 1926 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | William W. Hastings | | Democratic | 1922 | Incumbent re-elected. | nowrap | |- ! | Wilburn Cartwright | | Democratic | 1926 | Incumbent re-elected. | nowrap | |- ! | Tom D. McKeown | | Democratic | 1922 | Incumbent re-elected. | nowrap | |- ! | Fletcher B. Swank | | Democratic | 1920 | | Incumbent lost re-election.New member elected.Republican gain. | nowrap | |- ! | Jed Johnson | | Democratic | 1926 | Incumbent re-elected. | nowrap | |- ! | James V. McClintic | | Democratic | 1914 | Incumbent re-elected. | nowrap | |- ! | Milton C. Garber | | Republican | 1922 | Incumbent re-elected. | nowrap | |} Oregon |- ! | Willis C. Hawley | | Republican | 1906 | Incumbent re-elected. | nowrap | |- ! | Nicholas J. Sinnott | | Republican | 1912 | | Incumbent resigned May 31, 1928, after being appointed to the United States Court of Claims.New member elected November 6, 1928.Republican hold.Winner also elected to finish the term, see above. | nowrap | |- ! | Franklin F. Korell | | Republican | 1927 | Incumbent re-elected. | nowrap | |} Pennsylvania |- ! | James M. Beck | | Republican | 1927 | Incumbent re-elected. | nowrap | |- ! | George S. Graham | | Republican | 1912 | Incumbent re-elected. | nowrap | |- ! | Harry C. Ransley | | Republican | 1920 | Incumbent re-elected. | nowrap | |- ! | Benjamin M. Golder |