! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Iowa |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Kansas |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Kentucky |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Louisiana |- ! |- ! |- ! |- ! |- ! |- ! |} Maine |- ! |- ! |- ! |- ! |} Maryland |- ! | John Walter Smith | | Democratic | 1898 | | Incumbent resigned January 12, 1900, upon being elected Governor.New member elected.Republican gain. | nowrap | |- ! | William Benjamin Baker | | Republican | 1894 | | Incumbent retired.New member elected.Republican hold | nowrap | |- ! | Frank C. Wachter | | Republican | 1898 | Incumbent re-elected. | nowrap | |- ! | James W. Denny | | Democratic | 1898 | | Incumbent lost re-election. New member elected. Republican gain. | nowrap | |- ! | Sydney Emanuel Mudd I | | Republican | 1896 | Incumbent re-elected. | nowrap | |- ! | George A. Pearre | | Republican | 1898 | Incumbent re-elected | nowrap | |} Massachusetts |- ! | George P. Lawrence | | Republican | 1897 (special) | Incumbent re-elected. | nowrap | |- ! | Frederick H. Gillett | | Republican | 1892 | Incumbent re-elected. | nowrap | |- ! | John R. Thayer | | Democratic | 1898 | Incumbent re-elected. | nowrap | |- ! | George W. Weymouth | | Republican | 1892 | | Incumbent retired.New member elected.Republican hold. | nowrap | |- ! | William S. Knox | | Republican | 1894 | Incumbent re-elected. | nowrap | |- ! | William H. Moody | | Republican | 1895 (special) | Incumbent re-elected. | nowrap | |- ! | Ernest W. Roberts | | Republican | 1898 | Incumbent re-elected. | nowrap | |- ! | Samuel W. McCall | | Republican | 1892 | Incumbent re-elected. | nowrap | |- ! | John F. Fitzgerald | | Democratic | 1894 | | Incumbent retired.New member elected.Democratic hold.