Member-elect | Party | District | Election date | Congress | Reason for non-seating |
Benjamin West | Pro-Administration | NH-AL | February 2, 1789 | 1st | Declined to serve. |
James Townsend | Pro-Administration | NY-1 | April 27–29, 1790 | 2nd | Died on May 24, 1790. |
Pierpont Edwards | Pro-Administration | CT-AL | September 20, 1790 | 1st | Declined to serve. |
Stephen M. Mitchell | Pro-Administration | CT-AL | September 17, 1792 | 3rd | Resigned (elected to the U.S. Senate). |
Jonathan Ingersoll | Pro-Administration | CT-AL | September 16, 1793 | 3rd | Declined to serve. |
James Morris | Democratic-Republican | PA-4 | October 14, 1794 | 4th | Died on July 10, 1795. |
Thomas Tillotson | Democratic-Republican | NY-5 | April 29–May 1, 1800 | 7th | Resigned on August 10, 1801 (appointed Secretary of State of New York). |
John Cantine | Democratic-Republican | NY-7 | April 27–29, 1802 | 8th | Declined to serve. |
Phineas Bruce | Federalist | MA-17 | November 1, 1802 | 8th | Never qualified or attended due to illness. |
John Simpson | Democratic-Republican | KY-8 | August 3, 1812 | 13th | Died on January 22, 1813. |
John S. Edwards | Federalist | OH-6 | October 13, 1812 | 13th | Died on February 22, 1813. |
William Dowse | Federalist | NY-15 | December 15–17, 1812 | 13th | Died on February 18, 1813. |
John Woods | Federalist | PA-14 | October 11, 1814 | 14th | Never qualified or attended due to illness. |
Daniel Appleton White | Federalist | MA-3 | November 7, 1814 | 14th | Resigned (to be Judge of Probate for Essex County). |
Henry B. Lee | Democratic-Republican | NY-4 | April 23–25, 1816 | 15th | Died on September 16, 1816. |
David Scott | Democratic-Republican | PA-10 | October 8, 1816 | 15th | Resigned (to be judge of the court of common pleas). |
Alexander McMillan | Federalist | NC-7 | August 14, 1817 | 15th | Died on November 13, 1817. |
James Duncan | Democratic-Republican | PA-5 | October 10, 1820 | 17th | Resigned. |
David Ellicott Evans | Jacksonian Republican | NY-29 | November 6–8, 1826 | 20th | Resigned on May 2, 1827. |
Francis Jacob Harper | Democratic | PA-3 | October 11, 1836 | 25th | Died on March 18, 1837. |
Francis Gehon | Democratic | IA-AL Delegate | August 5, 1839 | 26th | William W. Chapman's term was extended to October 1840, invalidating Gehon's election.[1] |
Washington Poe | Whig | GA-3 | November 5, 1844 | 29th | Resigned.[2] |
David Levy Yulee | Democratic | FL-AL | May 26, 1845 | 29th | Resigned (elected to the U.S. Senate). |
Lyman Trumbull | Democratic | IL-8 | November 7, 1854 | 34th | Resigned (elected to the U.S. Senate). |
Thomas Child Jr. | Whig | NY-7 | November 7, 1854 | 34th | Never qualified or attended due to illness. |
Daniel D. Pratt | Republican | IN-8 | October 13, 1868 | 41st | Resigned on January 27, 1869 (elected to the U.S. Senate). |
Ambrose R. Wright | Democratic | GA-8 | November 5, 1872 | 43rd | Died on December 21, 1872. |
Samuel Peters | Republican | LA-4 | November 5, 1872 | 43rd | Died on October 1, 1873. |
John W. Head | Democratic | TN-4 | November 3, 1874 | 44th | Died on November 9, 1874. |
Garnett McMillan | Democratic | GA-9 | November 3, 1874 | 44th | Died on January 14, 1875. |
Augustus F. Allen | Democratic | NY-33 | November 3, 1874 | 44th | Died on January 22, 1875. |
Alexander Smith | Republican | NY-12 | November 5, 1878 | 46th | Died on November 5, 1878. |
Andrew S. Herron | Democratic | LA-4 | November 7, 1882 | 48th | Died on November 27, 1882. |
John Clayton | Republican | AR-2 | November 6, 1888 | 51st | Assassinated on January 29, 1889. |
Andrew J. Campbell | Republican | NY-10 | November 5, 1894 | 54th | Died on December 6, 1894.[3] |
Richard P. Giles | Democratic | MO-1 | November 3, 1896 | 55th | Died on November 17, 1896. |
James J. Davidson | Republican | PA-25 | November 3, 1896 | 55th | Died on January 2, 1897. |
B. H. Roberts | Democratic | UT-AL | November 8, 1898 | 56th | Congress refused to seat him because he was a bigamist. |
William Brown | Republican | PA-24 | November 3, 1914 | 64th | Died on January 31, 1915. |
Charles F. Van de Water | Republican | CA-9 | November 2, 1920 | 67th | Died on November 20, 1920. |
Samuel Marx | Democratic | NY-19 | November 7, 1922 | 68th | Died on November 30, 1922.[4] |
Matthew Vincent O'Malley | Democratic | NY-7 | February 17, 1931 | 72nd | Died on May 26, 1931. |
Jack Swigert | Republican | CO-6 | November 2, 1982 | 98th | Died on December 27, 1982.[5] |
Luke Letlow | Republican | LA-5 | December 5, 2020 | 117th | Died on December 29, 2020.[6] |