There were elections in 1903 to the United States House of Representatives:
Elections are listed by date and district.
| District | Incumbent | This race | |||
|---|---|---|---|---|---|
| Member | Party | First elected | Results | Candidates | |
| New York 7 | Nicholas Muller | Democratic | [?] | Incumbent resigned November 2, 1901. New member elected. Republican gain. |
|
| Missouri 12 | James Joseph Butler | Democratic | [?] | Election successfully challenged. New member seated. Republican gain. |
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Elections are listed by date and district.
| District | Incumbent | This race | |||
|---|---|---|---|---|---|
| Member | Party | First elected | Results | Candidates | |
| Ohio 16 | Joseph J. Gill | Republican | 1899 | Incumbent resigned October 31, 1903. New member elected November 3, 1903. Republican hold. |
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| Pennsylvania 4 | Robert H. Foerderer | Republican | 1900 | Incumbent died July 26, 1903. New member elected November 3, 1903. Republican hold. |
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| Texas 8 | Thomas H. Ball | Democratic | 1896 | Incumbent resigned November 16, 1903. New member elected November 17, 1903. Democratic hold. |
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| Kansas 7 | Vacant | Incumbent Chester I. Long (R) resigned to take a U.S. Senate seat. New member elected May 26, 1903. Republican hold. |
| ||
| Oregon 1 | Vacant | Incumbent Thomas H. Tongue (R) died January 11, 1903. New member elected June 1, 1903. Republican hold. |
| ||
| Kentucky 11 | Vincent Boreing | Republican | 1898 | Incumbent died September 16, 1903. New member elected November 10, 1903. Republican hold. |
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