List of former members of the United States House of Representatives (K) Number of years/terms representative/delegate has served Number of years/terms representative/delegate has served

| Representative | Years | State_ | Party | Lifespan_ |
|---|---|---|---|---|
| Charles Landon Knight | 1921–1923 | Ohio | Republican | 1867–1933 |
| Jonathan Knight | 1855–1857 | Pennsylvania | Oppositionist | 1787–1858 |
| Nehemiah Knight | 1803–1808 | Rhode Island | Democratic-Republican | 1746–1808 |
| Joe Knollenberg | 1993–2009 | Michigan | Republican | 1933– |
| Philip Knopf | 1903–1909 | Illinois | Republican | 1847–1920 |
| J. Proctor Knott | 1867–1871 , 1875–1883 | Kentucky | Democratic | 1830–1911 |
| Joseph R. Knowland | 1903–1914 | California | Republican | 1873–1966 |
| Freeman T. Knowles | 1897–1899 | South Dakota | Populist | 1846–1910 |
| Ebenezer Knowlton | 1855–1857 | Maine | Oppositionist | 1815–1874 |
| James Knox | 1853–1855 | Illinois | Whig | 1807–1876 |
| James Knox | 1855–1857 | Illinois | Oppositionist | 1807–1876 |
| Samuel Knox | 1864–1865 | Missouri | Unconditional Unionist | 1815–1905 |
| Victor A. Knox | 1953–1965 | Michigan | Republican | 1899–1976 |
| William Shadrach Knox | 1895–1903 | Massachusetts | Republican | 1843–1914 |
| Coya Knutson | 1955–1959 | Minnesota | Democratic-Farmer-Labor | 1912–1996 |
| Harold Knutson | 1917–1949 | Minnesota | Republican | 1880–1953 |