Some people who were elected to the United States House of Representatives died before taking their seats. In other cases, they failed to qualify; were rejected by the House; their credentials were successfully challenged; or they were somehow otherwise unable to become members.
This list only includes people who never served in the House. Re-elected incumbents are not included.
| Member-elect | Party | District | Election date | Congress | Reason for non-seating |
|---|---|---|---|---|---|
| Francis Gehon | ? | Iowa Territory | 1839 | ? | Was never seated due to change in law |
| Augustus F. Allen | Democratic | NY-33 | ??-1874 | 44th | Died January 22, 1875 |
| Victor L. Berger | Socialist | WI-5 | 1918-11-05 1919-12-19 |
66th | Congress twice refused to seat him because he was a convicted felon and World War I opponent |
| Andrew J. Campbell | Republican | NY-10 | ??-1894 | 54th | Died December 6, 1894[1] |
| Richard P. Giles | Democratic | MO-1 | ??-1896 | 55th | Died November 17, 1896 |
| James Reed Hallowell | Republican | KS-4 | ??-1878 | 46th | Congress refused to seat him |
| Samuel Marx | Democratic | NY-19 | ??-1922 | 68th | Died November 30, 1922[2] |
| Washington Poe | Whig | GA-3 | ??-1844 | 29th | Resigned before taking office[3] |
| B. H. Roberts | Democratic | UT-AL | ??-1898 | 56th | Congress refused to seat him |
| Lyman Trumbull | Democratic | IL-8 | ??-1854 | 34th | He was elected to the U.S. Senate prior to the first session |
| Charles F. Van de Water | Republican | CA-9 | 1920 | 67th | Died in a car crash |