| Guy Kawasaki | American businessman and auth… | 1954 |
| Alan Kay | computer scientist | 1940 |
| Guy Gavriel Kay | Canadian author of fantasy fi… | 1954 |
| Jackie Kay | Poet and novelist | 1961 |
| Ken Kay | | |
| Peter Kay | English writer, producer, act… | 1973 |
| Sarah Kay | | |
| Susan Kay | British writer | 1952 |
| Danny Kaye | American actor, singer, dance… | 1913–1987 |
| Susanna Kaysen | American writer | 1948 |
| Elia Kazan | Greek-American film and theat… | 1909–2003 |
| Nicholas Kazanas | | 1939 |
| Nikos Kazantzakis | Greek writer | 1883–1957 |
| Govinda K.C. | Nepalese philanthropic activi… | 1957 |
| Mang Ke | Chinese writer | 1951 |
| Cornelius Keagon | Liberian humanitarian aid wor… | 1996 |
| Margaret Keane | American artist | 1927 |
| Walter Keane | American plagiarist | 1915–2000 |
| Joshua Keating | American journalist | |
| Paul Keating | Australian politician, 24th P… | 1944 |
| Buster Keaton | American actor and filmmaker | 1895–1966 |
| Michael Keaton | American actor | 1951 |
| Ezra Jack Keats | American children's writer an… | 1916–1983 |
| John Keats | English Romantic poet | 1795–1821 |
| John Keble | English churchman and poet, a… | 1792–1866 |
| Kevin Keck | American writer | 1973 |
| Abdul Halim of Kedah | King of Malaysia | 1927–2017 |
| George Curzon, 1st Marquess Curzon of Kedleston | British politician | 1859–1925 |
| Kevin Keegan | English footballer | 1951 |
| John A. Keel | American writer | 1930–2009 |
| Sam Keen | author, professor, and philos… | 1931 |
| Steve Keen | Australian economist | 1953 |
| Monica Keena | American actress | 1979 |
| Maynard James Keenan | musician | 1964 |
| Brian Keene | American writer | 1967 |
| Carolyn Keene | house pseudonym used by the S… | 1905–2002 |
| Charles Keeping | British illustrator and child… | 1924–1988 |
| Weldon Kees | American artist | 1914–1955 |
| Bob Keeshan | United States Marine | 1927–2004 |
| Estes Kefauver | American politician | 1903–1963 |
| Joe Kehoskie | American baseball agent | 1973 |
| Garrison Keillor | American radio host and writer | 1942 |
| Wilhelm Keitel | German general | 1882–1946 |
| Arthur Keith | anatomy, anthropology, geolog… | 1866–1955 |
| Brian Keith | actor | 1921–1997 |
| George Keith | | |
| Toby Keith | American country music singer… | 1961 |
| Arthur Kekewich | British judge | 1832–1907 |
| August Kekulé | German organic chemist | 1829–1896 |
| Muhammad V of Kelantan | Sultan of Kelantan | 1969 |
| Paul Kellam | British virologist | 1965 |
| Albert Galloway Keller | American sociologist | 1874–1956 |
| Evelyn Fox Keller | American physicist, author an… | 1936 |
| Gary Keller | | |
| Hans Keller | Austrian-British musician and… | 1919–1985 |
| Helen Keller | American author and political… | 1880–1968 |
| Kevin Lane Keller | American business theorist | 1956 |
| Annette Kellerman | Australian swimmer, vaudevill… | 1886–1975 |
| Barbara Kellerman | American academic | 1939 |
| Jonathan Kellerman | novelist, psychologist | 1949 |
| Harold Kelley | American psychologist & acade… | 1921–2003 |
| Friedrich Kellner | German Justice inspector | 1885–1970 |
| John Harvey Kellogg | American physician | 1852–1943 |
| Frances Kellor | American sociologist | 1873–1952 |
| Ellsworth Kelly | American painter, sculptor, a… | 1923–2015 |
| Gene Kelly | American dancer, actor, singe… | 1912–1996 |
| Grace Kelly | American actress and Princess… | 1929–1982 |
| John F. Kelly | American politician and milit… | 1950 |
| Kate Kelly | American feminist | 1980 |
| Kevin Kelly | American author and editor | 1952 |
| Megyn Kelly | American reporter | 1970 |
| Ned Kelly | Australian bushranger | 1855–1880 |
| Richard T. Kelly | | |
| Walt Kelly | American cartoonist | 1913–1973 |
| Hans Kelsen | Austrian lawyer | 1881–1973 |
| Edwin C. Kemble | American physicist | 1889–1984 |
| Fanny Kemble | English actress and writer | 1809–1893 |
| John Philip Kemble | British actor-manager | 1757–1823 |
| Arthur Kemp | British writer | 1962 |
| Brian Kemp | American politician, Governor… | 1963 |
| Jack Kemp | American football player, qua… | 1935–2009 |
| Richard Kemp | British Army officer | 1959 |
| Margery Kempe | English saint | 1373 |
| Thomas à Kempis | German canon regular | 1380–1471 |
| Murray Kempton | American journalist | 1917–1997 |
| Thomas Ken | Bishop of Bath and Wells | 1637–1711 |
| Henry Way Kendall | American physicist | 1926–1999 |
| Ibram X. Kendi | American author and historian | 1982 |
| Stephen Kendrick | American film producer | 1973 |
| Thomas Keneally | Australian novelist | 1935 |
| Koho Kenichi | Japanese sangha of Rinzai sch… | 1241–1316 |
| Katrina Kenison | American writer | |
| Yoshida Kenkō | japanese writer | 1283–1350 |
| Leif Edward Ottesen Kennair | | 1970 |
| George F. Kennan | American advisor, diplomat, p… | 1904–2005 |
| Adrienne Kennedy | African-American playwright | 1931 |
| Anthony Kennedy | Associate Justice of the Supr… | 1936 |
| Charles Kennedy | British politician | 1959–2015 |
| Eugene Kennedy | American psychologist | 1928–2015 |
| Geoffrey Studdert Kennedy | British saint | 1883–1929 |
