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_ |
|---|---|---|---|---|
| Ed Koch | 1969–1977 | New York | Democratic | 1924–2013 |
| Leo Kocialkowski | 1933–1943 | Illinois | Democratic | 1882–1958 |
| Raymond P. Kogovsek | 1979–1985 | Colorado | Democratic | 1941– |
| Jim Kolbe | 1985–2007 | Arizona | Republican | 1942– |
| Joseph P. Kolter | 1983–1993 | Pennsylvania | Democratic | 1926– |
| George Konig | 1911–1913 | Maryland | Democratic | 1856–1913 |
| Ernie Konnyu | 1987–1989 | California | Republican | 1937– |
| Thomas F. Konop | 1911–1917 | Wisconsin | Democratic | 1879–1964 |
| William Henry Koontz | 1866–1869 | Pennsylvania | Republican | 1830–1911 |
| Michael J. Kopetski | 1991–1995 | Oregon | Democratic | 1949– |
| Arthur W. Kopp | 1909–1913 | Wisconsin | Republican | 1874–1967 |
| William F. Kopp | 1921–1933 | Iowa | Republican | 1869–1938 |
| Herman P. Kopplemann | 1933–1939 , 1941–1943 , 1945–1947 | Connecticut | Democratic | 1880–1957 |
| Charles A. Korbly | 1909–1915 | Indiana | Democratic | 1871–1937 |
| Franklin F. Korell | 1927–1931 | Oregon | Republican | 1889–1965 |