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_ |
|---|---|---|---|---|
| Richard M. Kleberg | 1931–1945 | Texas | Democratic | 1887–1955 |
| Rudolph Kleberg | 1896–1903 | Texas | Democratic | 1847–1924 |
| Jerry Kleczka | 1984–2005 | Wisconsin | Democratic | 1943– |
| John C. Kleczka | 1919–1923 | Wisconsin | Republican | 1885–1959 |
| Arthur George Klein | 1941–1945 , 1946–1956 | New York | Democratic | 1904–1968 |
| Herbert Klein | 1993–1995 | New Jersey | Democratic | 1930– |
| Ron Klein | 2007–2011 | Florida | Democratic | 1957– |
| John J. Kleiner | 1883–1887 | Indiana | Democratic | 1845–1911 |
| Thomas S. Kleppe | 1967–1971 | North Dakota | Republican | 1919–2007 |
| Frank B. Klepper | 1905–1907 | Missouri | Republican | 1864–1933 |
| Ardolph Loges Kline | 1921–1923 | New York | Republican | 1858–1930 |
| Isaac Clinton Kline | 1921–1923 | Pennsylvania | Republican | 1858–1947 |
| Marcus C.L. Kline | 1903–1907 | Pennsylvania | Democratic | 1855–1911 |
| John Klingensmith, Jr. | 1835–1839 | Pennsylvania | Democratic | 1786–1854 |
| Ron Klink | 1993–2001 | Pennsylvania | Democratic | 1951– |