There were elections in 1909 to the United States House of Representatives:
|-! | Robert C. Davey| | Democratic| 1892
1894
1896| | Incumbent member-elect died during previous congress.
New member elected March 30, 1909.
Democratic hold.| nowrap |
|-! | Theodore E. Burton| | Republican| | | Incumbent member-elect resigned during previous congress.
New member elected April 20, 1909.
Republican hold.| nowrap |
|-! | William Lorimer| | Republican| | | Incumbent resigned June 17, 1909, after being elected to the U.S. Senate.
New member elected November 23, 1909.
Republican hold.| nowrap |
|-! | Francis W. Cushman| | Republican| 1898| | Incumbent died July 6, 1909.
New member elected November 2, 1909.
Republican hold.| nowrap |
|-! | Pablo Ocampo| | Democratic| 1907| | Term ended November 22, 1909.
New delegate elected November 23, 1909.
Nacionalista gain.| nowrap |
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