The 1904 United States House of Representatives elections were held for the most part on November 8, 1904, with Oregon, Maine, and Vermont holding theirs early in either June or September. They coincided with the election to a full term of President Theodore Roosevelt. Elections were held for 386 seats of the United States House of Representatives, representing 45 states, to serve in the 59th United States Congress.
Roosevelt's popularity swept many Republican house candidates into office, cementing their majority over the opposition Democratic Party. Because Roosevelt came from a liberal wing of the Republican Party, his ideology was prevalent among freshman representatives. Progressive Republicanism mobilized a new base of support and proved to be especially popular among the Protestant middle-class workers who held jobs in business or in the front offices of industrial facilities.
The previous election of 1902 saw 3 Independent Republicans elected in the Pittsburgh area of Pennsylvania.
In 1904, three states, with 8 seats among them, held elections early:
|- ! | George W. Croft | | Democratic | 1902 | | Incumbent died March 10, 1904.<br/>New member elected May 17, 1904.<br/>Winner was not a candidate for the next term; see below. | nowrap |
|- ! | Victor H. Metcalf | | Republican | 1898 | | Incumbent resigned July 1, 1904 to become U.S. Secretary of Commerce and Labor.<br/>New member elected November 8, 1904.<br/>Republican hold.<br/>Winner was also elected to the next term; see below. | nowrap |
|- !
|- ! | George W. Taylor | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | Ariosto A. Wiley | | Democratic | 1900 | Incumbent re-elected. | nowrap |
|- ! | Henry D. Clayton Jr. | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | Sydney J. Bowie | | Democratic | 1900 | Incumbent re-elected. | nowrap |
|- ! | J. Thomas Heflin | | Democratic | 1904 | Incumbent re-elected. | nowrap |
|- ! | John H. Bankhead | | Democratic | 1886 | Incumbent re-elected. | nowrap |
|- ! | John L. Burnett | | Democratic | 1898 | Incumbent re-elected. | nowrap |
|- ! | William Richardson | | Democratic | 1900 | Incumbent re-elected. | nowrap |
|- ! | Oscar Underwood | | Democratic | 1894 | Incumbent re-elected. | nowrap |
|- ! | Robert B. Macon | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | Stephen Brundidge Jr. | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | Hugh A. Dinsmore | | Democratic | 1892 | | Incumbent lost renomination.<br/>Democratic hold. | nowrap |
|- ! | John S. Little | | Democratic | 1894 | Incumbent re-elected | nowrap |
|- ! | Charles C. Reid | | Democratic | 1900 | Incumbent re-elected. | nowrap |
|- ! | Joseph T. Robinson | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | Robert M. Wallace | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | James Gillett | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Theodore A. Bell | | Democratic | 1902 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |
|- ! | Victor H. Metcalf | | Republican | 1898 | | Incumbent resigned July 1, 1904 to become U.S. Secretary of Commerce and Labor.<br/>Republican hold.<br/>Winner was also elected to finish the current term; see above. | nowrap |
|- ! | Edward J. Livernash | | Democratic - Union Labor | 1902 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |
|- ! | William J. Wynn | | Democratic | 1902 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |
|- ! | James C. Needham | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | James McLachlan | | Republican | 1900 | Incumbent re-elected. | nowrap |
|- ! | Milton J. Daniels | | Republican | 1902 | | Incumbent retired.<br/>Republican hold. | nowrap |
|- ! | Robert W. Bonynge | | 1902 <small>(contest)</small> | Incumbent re-elected. | nowrap |
|- ! | Herschel M. Hogg | | 1902 | Incumbent re-elected. | nowrap |
|- ! | Franklin E. Brooks | | 1902 | Incumbent re-elected. | nowrap |
|- ! | E. Stevens Henry | | 1894 | Incumbent re-elected. | nowrap |
|- ! | Nehemiah D. Sperry | | 1894 | Incumbent re-elected. | nowrap |
|- ! | Frank B. Brandegee | | 1902 <small>(special)</small> | Incumbent re-elected. | nowrap |
|- ! | Ebenezer J. Hill | | 1894 | Incumbent re-elected. | nowrap |
|- ! | colspan=3 | None (new seat) | | New seat.<br/>Republican gain. | nowrap |
|- ! | Henry A. Houston | | Democratic | 1902 | | Incumbent retired.<br>Republican gain. | nowrap |
|- ! | Stephen M. Sparkman | | Democratic | 1894 | Incumbent re-elected. | nowrap |
|- ! | Robert Wyche Davis | | Democratic | 1896 | | Incumbent retired.<br/>Democratic hold. | nowrap |
|- ! | William B. Lamar | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | Rufus E. Lester | | Democratic | 1888 | Incumbent re-elected. | nowrap |
|- ! | James M. Griggs | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | Elijah B. Lewis | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | William C. Adamson | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | Leonidas F. Livingston | | Democratic | 1890 | Incumbent re-elected. | nowrap |
|- ! | Charles L. Bartlett | | Democratic | 1894 | Incumbent re-elected. | nowrap |
|- ! | John W. Maddox | | Democratic | 1892 | | Incumbent retired.<br/>Democratic hold. | nowrap |
|- ! | William M. Howard | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | Farish Tate | | Democratic | 1892 | | Incumbent lost renomination.<br/>Democratic hold. | nowrap |
|- ! | Thomas W. Hardwick | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | William G. Brantley | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | Burton L. French | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Martin Emerich | | Democratic | 1902 | | Incumbent retired.<br/>Republican gain. | nowrap |
|- ! | James Robert Mann | | Republican | 1896 | Incumbent re-elected. | nowrap |
|- ! | William Warfield Wilson | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | George Peter Foster | | Democratic | 1898 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |
|- ! | James McAndrews | | Democratic | 1900 | | Incumbent retired.<br/>Republican gain. | nowrap |
|- ! | William Lorimer | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Philip Knopf | | Republican | 1902 | Incumbent re-elected | nowrap |
|- ! | William F. Mahoney | | Democratic | 1900 | | Incumbent died.<br/>Republican gain. | nowrap |
|- ! | Henry Sherman Boutell | | Republican | 1897 | Incumbent re-elected. | nowrap |
|- ! | George E. Foss | | Republican | 1894 | Incumbent re-elected. | nowrap |
|- ! | Howard M. Snapp | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Charles Eugene Fuller | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Robert R. Hitt | | Republican | 1882 | Incumbent re-elected. | nowrap |
|- ! | Benjamin F. Marsh | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | George W. Prince | | Republican | 1895 | Incumbent re-elected. | nowrap |
|- ! | Joseph V. Graff | | Republican | 1894 | Incumbent re-elected. | nowrap |
|- ! | John A. Sterling | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Joseph Gurney Cannon | | Republican | 1892 | Incumbent re-elected. | nowrap |
|- ! | Vespasian Warner | | Republican | 1894 | | Incumbent retired to run for Governor of Illinois. <br/>Republican hold. | nowrap |
|- ! | Henry T. Rainey | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | Ben F. Caldwell | | Democratic | 1898 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |
|- ! | William A. Rodenberg | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Joseph B. Crowley | | Democratic | 1898 | | Incumbent retired.<br/>Republican gain. | nowrap |
|- ! | James R. Williams | | Democratic | 1898 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |
|- ! | George Washington Smith | | Republican | 1888 | Incumbent re-elected. | nowrap |
|- ! | James A. Hemenway | | Republican | 1894 | Incumbent re-elected but resigned when elected U.S. Senator. | nowrap |
|- ! | Robert W. Miers | | Democratic | 1896 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |
|- ! | William T. Zenor | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | Francis M. Griffith | | Democratic | 1897 | | Incumbent retired.<br/>Democratic hold. | nowrap |
|- ! | Elias S. Holliday | | Republican | 1900 | Incumbent re-elected. | nowrap |
|- ! | James E. Watson | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | Jesse Overstreet | | Republican | 1894 | Incumbent re-elected. | nowrap |
|- ! | George W. Cromer | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | Charles B. Landis | | Republican | 1896 | Incumbent re-elected. | nowrap |
|- ! | Edgar D. Crumpacker | | Republican | 1896 | Incumbent re-elected. | nowrap |
|- ! | Frederick Landis | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | James M. Robinson | | Democratic | 1896 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |
|- ! | Abraham L. Brick | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | Thomas Hedge | | Republican | 1898 | Incumbent re-elected | nowrap |
|- ! | Martin J. Wade | | Democratic | 1902 | | Incumbent lost re-election.<br>Republican gain. | nowrap |
|- ! | Benjamin P. Birdsall | | Republican | 1902 | Incumbent re-elected | nowrap |
|- ! | Gilbert N. Haugen | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | Robert G. Cousins | | Republican | 1892 | Incumbent re-elected. | nowrap |
|- ! | John F. Lacey | | Republican | 1892 | Incumbent re-elected. | nowrap |
|- ! | John A. T. Hull | | Republican | 1890 | Incumbent re-elected. | nowrap |
|- ! | William P. Hepburn | | Republican | 1892 | Incumbent re-elected. | nowrap |
|- ! | Walter I. Smith | | Republican | 1900 | Incumbent re-elected. | nowrap |
|- ! | James P. Conner | | Republican | 1900 | Incumbent re-elected. | nowrap |
|- ! | Lot Thomas | | Republican | 1898 | | Incumbent lost renomination. <br/>Republican hold. | nowrap |
|- ! | Charles Curtis | | Republican | 1892 | Incumbent re-elected. | nowrap |
|- ! | Justin De Witt Bowersock | | Republican | 1898 | Incumbent re-elected. | nowrap | |- ! | Philip P. Campbell | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | James Monroe Miller | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | William A. Calderhead | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | William A. Reeder | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | Victor Murdock | | Republican | 1903 | Incumbent re-elected. | nowrap |
|- ! | Charles Frederick Scott | | Republican | 1900 | Incumbent re-elected. | nowrap |
|- ! | Ollie Murray James | | Democratic | 1902 | Incumbent re-elected. | nowrap | |- ! | Augustus Owsley Stanley | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- !
| John S. Rhea | | Democratic | 1896 | | Incumbent retired.<br/>Democratic hold. | nowrap |
|- ! | David Highbaugh Smith | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | J. Swagar Sherley | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | Daniel Linn Gooch | | Democratic | 1900 | | Incumbent lost renomination.<br/>Democratic hold. | nowrap |
|- ! | South Trimble | | Democratic | 1900 | Incumbent re-elected. | nowrap |
|- ! | George G. Gilbert | | Democratic | 1898 | Incumbent re-elected. | nowrap | |- !
| James N. Kehoe | | Democratic | 1900 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |
|- ! | Francis A. Hopkins | | Democratic | 1902 | Incumbent re-elected. | nowrap | |- ! | W. Godfrey Hunter | | Republican | 1903 | | Incumbent retired.<br/>Republican hold. | nowrap |
|- ! | Adolph Meyer | | Democratic | 1890 | Incumbent re-elected. | nowrap |
|- ! | Robert C. Davey | | Democratic | 1892<br>1896 | Incumbent re-elected. | nowrap |
|- ! | Robert F. Broussard | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | Phanor Breazeale | | Democratic | 1898 | | Incumbent lost renomination.<br/>Democratic hold. | nowrap |
|- ! | Joseph E. Ransdell | | Democratic | 1899 (special) | Incumbent re-elected. | nowrap |
|- ! | Samuel M. Robertson | | Democratic | 1887 (special) | Incumbent re-elected. | nowrap |
|- ! | Arsène Pujo | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | Amos L. Allen | | Republican | 1899 | Incumbent re-elected. | nowrap |
|- ! | Charles E. Littlefield | | Republican | 1899 | Incumbent re-elected | nowrap |
|- ! | Edwin C. Burleigh | | Republican | 1897 | Incumbent re-elected. | nowrap |
|- ! | Llewellyn Powers | | Republican | 1901 | Incumbent re-elected. | nowrap |
|- ! | William H. Jackson | | Republican | 1900 | | Incumbent lost re-election.<br/> Democratic gain. | nowrap | |- ! | J. Frederick C. Talbott | | Democratic | 1902 | Incumbent re-elected. | nowrap | |- ! | Frank C. Wachter | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | James W. Denny | | Democratic | 1902 | | Incumbent retired.<br/> Democratic hold. | nowrap |
|- ! | Sydney E. Mudd I | | Republican | 1896 | Incumbent re-elected. | nowrap |
|- ! | George A. Pearre | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | George P. Lawrence | | Republican | 1897 <small>(special)</small> | Incumbent re-elected. | nowrap |
|- ! | Frederick H. Gillett | | Republican | 1892 | Incumbent re-elected. | nowrap |
|- ! | John R. Thayer | | Democratic | 1898 | | Incumbent retired.<br>Republican gain. | nowrap |
|- ! | Charles Q. Tirrell | | Republican | 1900 | Incumbent re-elected. | nowrap |
|- ! | Butler Ames | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Augustus P. Gardner | | Republican | 1902 <small>(special)</small> | Incumbent re-elected. | nowrap |
|- ! | Ernest W. Roberts | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | Samuel W. McCall | | Republican | 1892 | Incumbent re-elected. | nowrap |
|- ! | John A. Keliher | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | William S. McNary | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | John Andrew Sullivan | | Democratic | 1902 | Incumbent re-elected. | nowrap | |- ! | Samuel L. Powers | | Republican | 1900 | | Incumbent retired.<Br>Republican hold. | nowrap |
|- ! | William S. Greene | | Republican | 1898 <small>(special)</small> | Incumbent re-elected. | nowrap |
|- ! | William C. Lovering | | Republican | 1896 | Incumbent re-elected. | nowrap |
|- ! | Alfred Lucking | | Democratic | 1902 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |
|- ! | Charles E. Townsend | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Washington Gardner | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | Edward L. Hamilton | | Republican | 1896 | Incumbent re-elected. | nowrap |
|- ! | William Alden Smith | | Republican | 1894 | Incumbent re-elected. | nowrap |
|- ! | Samuel W. Smith | | Republican | 1896 | Incumbent re-elected. | nowrap |
|- ! | Henry McMorran | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Joseph W. Fordney | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | Roswell P. Bishop | | Republican | 1894 | Incumbent re-elected. | nowrap |
|- ! | George A. Loud | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Archibald B. Darragh | | Republican | 1900 | Incumbent re-elected. | nowrap |
|- ! | H. Olin Young | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | | | 1892 | Incumbent re-elected. | nowrap |
|- ! | | | 1892 | Incumbent re-elected. | nowrap |
|- ! | | | 1894 | Incumbent re-elected. | nowrap |
|- ! | | | 1896 | Incumbent re-elected. | nowrap | Frederick Stevens (Republican) 100%
|- ! | | | 1886<br/>1892 <small>(retired)</small><br/>1902 | | Incumbent retired.<br/>Republican gain. | nowrap |
|- ! | | | 1902 | Incumbent re-elected. | nowrap |
|- ! | | | 1902 | Incumbent re-elected. | nowrap |
|- ! | | | 1902 | Incumbent re-elected. | nowrap |
|- ! | | | 1902 | Incumbent re-elected. | nowrap | Halvor Steenerson (Republican) 100%
|- ! | Ezekiel S. Candler Jr. | | Democratic | 1900 | Incumbent re-elected. | nowrap |
|- ! | Thomas Spight | | Democratic | 1898 <small>(special)</small> | Incumbent re-elected. | nowrap |
|- ! | Benjamin G. Humphreys II | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | Wilson S. Hill | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | Adam M. Byrd | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | Eaton J. Bowers | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | Frank A. McLain | | Democratic | 1898 <small>(special)</small> | Incumbent re-elected. | nowrap |
|- ! | John S. Williams | | Democratic | 1892 | Incumbent re-elected. | nowrap |
|- ! | James T. Lloyd | | Democratic | 1897 | Incumbent re-elected. | nowrap | |- ! | William W. Rucker | | Democratic | 1898 | Incumbent re-elected. | nowrap | |- ! | John Dougherty | | Democratic | 1898 | | Incumbent lost renomination.<br/>Republican gain. | nowrap | |- ! | Charles F. Cochran | | Democratic | 1896 | | Incumbent retired.<br/>Republican gain. | nowrap | |- ! | William S. Cowherd | | Democratic | 1896 | | Incumbent lost re-election.<br/>Republican gain. | nowrap | |- ! | David A. De Armond | | Democratic | 1890 | Incumbent re-elected. | nowrap | |- ! | Courtney W. Hamlin | | Democratic | 1902 | | Incumbent lost re-election.<br/>Republican gain. | nowrap | |- ! | Dorsey W. Shackleford | | Democratic | 1899 | Incumbent re-elected. | nowrap | |- ! | Champ Clark | | Democratic | 1896 | Incumbent re-elected. | nowrap | |- ! | Richard Bartholdt | | Republican | 1892 | Incumbent re-elected. | nowrap | |- ! | John T. Hunt | | Democratic | 1902 | Incumbent re-elected. | nowrap | |- ! rowspan=2 | | rowspan=2 | James Joseph Butler | rowspan=2 | Democratic | rowspan=2 | 1900 | | Incumbent retired.<br/>Democratic hold. | nowrap | |- | | Election successfully contested.<br>New member seated June 23, 1906.<br>Republican gain. | nowrap | |- ! | Edward Robb | | Democratic | 1896 | | Incumbent lost re-election.<br/>Republican gain. | nowrap | |- ! | Willard Duncan Vandiver | | Democratic | 1896 | | Incumbent retired.<br/>Republican gain. | nowrap | |- ! | Maecenas E. Benton | | Democratic | 1896 | | Incumbent lost re-election.<br/>Republican gain. | nowrap | |- ! | J. Robert Lamar | | Democratic | 1902 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |
|- ! | Joseph M. Dixon | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Elmer Burkett | | Republican | 1898 | Incumbent re-elected.<br/>Resigned before start of term to become Senator. | nowrap |
|- ! | Gilbert Hitchcock | | Democratic | 1902 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |
|- ! | John McCarthy | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Edmund H. Hinshaw | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | George W. Norris | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Moses Kinkaid | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Clarence D. Van Duzer | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | Cyrus A. Sulloway | | Republican | 1894 | Incumbent re-elected. | nowrap | |- ! | Frank D. Currier | | Republican | 1900 | Incumbent re-elected. | nowrap |
|- ! | Henry C. Loudenslager | | Republican | 1892 | Incumbent re-elected. | nowrap | |- ! | John J. Gardner | | Republican | 1892 | Incumbent re-elected. | nowrap | |- ! | Benjamin F. Howell | | Republican | 1894 | Incumbent re-elected. | nowrap | |- ! | William M. Lanning | | Republican | 1902 | | Incumbent resigned on appointment as district judge of 3rd circuit. Winner also elected to finish term.<br>Republican hold. | nowrap | |- ! | Charles N. Fowler | | Republican | 1894 | Incumbent re-elected. | nowrap | |- ! | William Hughes | | Democratic | 1902 | | Incumbent lost re-election.<br>Republican gain. | nowrap | |- ! | Richard W. Parker | | Republican | 1894 | Incumbent re-elected. | nowrap | |- ! | William H. Wiley | | Republican | 1902 | Incumbent re-elected. | nowrap | |- ! | Allan Benny | | Democratic | 1902 | | Incumbent lost re-election.<br>Republican gain. | nowrap | |- ! | Allan L. McDermott | | Democratic | 1900 | Incumbent re-elected. | nowrap |
|- ! rowspan=2 | <br/> | Thomas F. Marshall | | Republican | nowrap | 1900 | Incumbent re-elected. | nowrap rowspan=2 |
|- | Burleigh F. Spalding | | Republican | nowrap | 1902 | | Incumbent lost renomination.<br/>Republican hold.
|- ! | Binger Hermann | | Republican | 1903 <small>(special)</small> | Incumbent re-elected. | nowrap | |- ! | John N. Williamson | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | George Swinton Legaré | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | George W. Croft | | Democratic | 1902 | | Incumbent retired.<br/>Democratic hold. | nowrap |
|- ! | Wyatt Aiken | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | Joseph T. Johnson | | Democratic | 1900 | Incumbent re-elected. | nowrap |
|- ! | David E. Finley | | Democratic | 1898 | Incumbent re-elected. | nowrap |
|- ! | Robert B. Scarborough | | Democratic | 1900 | | Incumbent retired.<br/>Democratic hold. | nowrap |
|- ! | A. Frank Lever | | Democratic | 1901 | Incumbent re-elected. | nowrap |
|- ! rowspan=2 | <br/> | Charles H. Burke | | Republican | 1898 | Incumbent re-elected. | rowspan=2 nowrap |
|- | Eben Martin | | Republican | 1900 | Incumbent re-elected.
|- ! | Walter P. Brownlow | | Republican | 1896 | Incumbent re-elected. | nowrap |
|- ! | Henry R. Gibson | | Republican | 1894 | |Incumbent retired.<br/>Republican hold. | nowrap |
|- ! | John A. Moon | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | Morgan C. Fitzpatrick | | Democratic | 1902 | |Incumbent retired.<br/>Democratic hold. | nowrap |
|- ! | James D. Richardson | | Democratic | 1884 | |Incumbent retired.<br/>Democratic hold. | nowrap |
|- ! | John W. Gaines | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | Lemuel P. Padgett | | Democratic | 1900 | Incumbent re-elected. | nowrap |
|- ! | Thetus W. Sims | | Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | Rice A. Pierce | | Democratic | 1896 | |Incumbent lost renomination.<br/>Democratic hold. | nowrap |
|- ! | Malcolm R. Patterson | | Democratic | 1900 | Incumbent re-elected. | nowrap |
|- ! | David J. Foster | | Republican | 1900 | Incumbent re-elected. | nowrap |
|- ! | Kittredge Haskins | | Republican | 1900 | Incumbent re-elected. | nowrap |
|- ! | William A. Jones | | 1890 | Incumbent re-elected. | nowrap |
|- ! | Harry L. Maynard | | 1900 | Incumbent re-elected. | nowrap |
|- ! | John Lamb | | 1896 | Incumbent re-elected. | nowrap |
|- ! | Robert G. Southall | | 1902 | Incumbent re-elected. | nowrap |
|- ! | Claude A. Swanson | | 1892 | Incumbent re-elected. | nowrap |
|- ! | Carter Glass | | 1901 <small>(special)</small> | Incumbent re-elected. | nowrap |
|- ! | James Hay | |Democratic | 1896 | Incumbent re-elected. | nowrap |
|- ! | John Franklin Rixey | | 1896 | Incumbent re-elected. | nowrap |
|- ! | Campbell Slemp | | 1902 | Incumbent re-elected. | nowrap |
|- ! | Henry D. Flood | |Democratic | 1900 | Incumbent re-elected. | nowrap |
|- ! | Blackburn B. Dovener | | Republican | 1894 | Incumbent re-elected. | nowrap |
|- ! | Alston G. Dayton | | Republican | 1894 | Incumbent re-elected. | nowrap |
|- ! | Joseph H. Gaines | | Republican | 1900 | Incumbent re-elected. | nowrap |
|- ! | Harry C. Woodyard | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | James A. Hughes | | Republican | 1900 | Incumbent re-elected. | nowrap |
Wisconsin elected eleven members of congress on Election Day, November 8, 1904.
|- ! | Henry Allen Cooper | | Republican | 1892 | Incumbent re-elected. | nowrap |
|- ! | Henry Cullen Adams | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Joseph W. Babcock | | Republican | 1892 | Incumbent re-elected. | nowrap |
|- ! | Theobald Otjen | | Republican | 1894 | Incumbent re-elected. | nowrap |
|- ! | William H. Stafford | | Republican | 1902 | Incumbent re-elected. | nowrap |
|- ! | Charles H. Weisse | | Democratic | 1902 | Incumbent re-elected. | nowrap |
|- ! | John J. Esch | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | James H. Davidson | | Republican | 1896 | Incumbent re-elected. | nowrap |
|- ! | Edward S. Minor | | Republican | 1894 | Incumbent re-elected. | nowrap |
|- ! | Webster E. Brown | | Republican | 1900 | Incumbent re-elected. | nowrap |
|- ! | John J. Jenkins | | Republican | 1894 | Incumbent re-elected. | nowrap |
|- ! | Frank W. Mondell | | Republican | 1898 | Incumbent re-elected. | nowrap |
|- ! | Bird S. McGuire | | Republican | 1902 | Incumbent re-elected. | nowrap |
New Mexico Territory elected its non-voting delegate November 8, 1904.
|- ! | Bernard Shandon Rodey | | Republican | 1900 | | Incumbent lost renomination and then lost re-election as an Independent Republican.<br/>Republican hold. | nowrap |