| Herbert Kroemer | Nobel laureate in physics | 1928 |
| Neelie Kroes | Dutch politician | 1941 |
| August Krogh | Danish physiologist | 1874–1949 |
| Leopold Kronecker | German mathematician who work… | 1823–1891 |
| Louis Kronenberger | American critic and writer | 1904–1980 |
| Alexander Kronrod | Russian mathematician | 1921–1986 |
| Peter Kropotkin | Russian zoologist, evolutiona… | 1842–1921 |
| Eerik-Niiles Kross | Estonian politician | 1967 |
| Harold Kroto | British chemist | 1939–2016 |
| Pavel Kroupa | Australian astrophysicist | 1963 |
| William Kent Krueger | author, novelist | 1950 |
| Judith Krug | librarian and freedom of spee… | 1940–2009 |
| Barbara Kruger | American artist | 1945 |
| Carl Kruger | American politician | 1949 |
| Danny Kruger | British politician and Conser… | 1974 |
| Paul Kruger | President of the South Africa… | 1825–1904 |
| Arie W. Kruglanski | American psychologist | 1939 |
| Paul Krugman | American economist | 1953 |
| John Kruk | American baseball player | 1961 |
| Alfred Freddy Krupa | Croatian contemporary painter… | 1971 |
| Joanna Krupa | Polish-American model and act… | 1979 |
| Holly Kruse | | |
| Kevin M. Kruse | American historian | 1972 |
| Peter Kruse | German psychologist | 1955–2015 |
| Martin David Kruskal | American mathematician | 1925–2006 |
| Joseph Wood Krutch | American writer, critic, and … | 1893–1970 |
| Herman Kruyder | Dutch painter | 1881–1935 |
| Nikolai Krylenko | Russian revolutionary, politi… | 1885–1938 |
| Ivan Krylov | Russian writer | 1769–1844 |
| Mike Krzyzewski | American basketball player an… | 1947 |
| Yeh Kuang-shih | Chinese diplomat | 1957 |
| George Kubler | American art historian | 1912–1996 |
| Elisabeth Kübler-Ross | American psychiatrist | 1926–2004 |
| Akira Kubo | Japanese actor | 1936 |
| Tite Kubo | Japanese manga artist | 1977 |
| Yōsuke Kubozuka | Japanese actor | 1979 |
| Najmuddin Kubra | Iranian sufi poet and philoso… | 1145–1221 |
| Stanley Kubrick | American film director, scree… | 1928–1999 |
| Leonid Kuchma | Second president of Ukraine | 1938 |
| Dennis Kucinich | Ohio politician | 1946 |
| Elizabeth Kucinich | British activist | 1977 |
| Lawrence Kudlow | American economist | 1947 |
| John Michael Kudrick | Roman Catholic bishop | 1947 |
| Lisa Kudrow | American actress | 1963 |
| Anatoly Kudryavitsky | a Russian/Irish novelist, poe… | 1954 |
| Erik von Kuehnelt-Leddihn | Austrian noble and political … | 1909–1999 |
| Quirinus Kuhlmann | German poet and mystic | 1651–1689 |
| Maggie Kuhn | American activist | 1905–1995 |
| Thomas Kuhn | American historian, physicist… | 1922–1996 |
| Jeffrey T. Kuhner | American journalist | 1969 |
| Wong Ka Kui | Hong Kong singer-songwriter | 1962–1993 |
| Richard Kuklinski | American contract killer | 1935–2006 |
| Visvaldas Kulbokas | Lithuanian prelate of the Rom… | 1974 |
| Karol Kulczycki | Polish Roman Catholic prelate… | 1966 |
| Eugene M. Kulischer | American sociologist | 1881–1956 |
| Ted Kulongoski | American politician | 1940 |
| Chad Kultgen | American writer | 1976 |
| Kengo Kuma | Japanese architect (b.1954) | 1954 |
| Akshay Kumar | Indian film actor and producer | 1967 |
| J. C. Kumarappa | Jōsaph Celladurai; b. 01/04/1… | 1892–1960 |
| Chandrika Kumaratunga | President of Sri Lanka | 1945 |
| Anil Kumble | Former Indian cricketer | 1970 |
| Maxine Kumin | American poet and author | 1925–2014 |
| Fu Kun-chi | Taiwanese politician | 1962 |
| Milan Kundera | Czech author of Czech and Fre… | 1929–2023 |
| August Kundt | German physicist | 1839–1894 |
| Hans Küng | Swiss Catholic priest, theolo… | 1928 |
| Wu Kung-tsao | Chinese martial artist | 1902–1983 |
| Huang Kun-huei | Taiwanese politician | 1936 |
| Mila Kunis | American actress | 1983 |
| Stanley Kunitz | poet | 1905–2006 |
| Kurien Kunnumpuram | Indian theologian | 1931–2018 |
| James Howard Kunstler | American writer | 1948 |
| William Kunstler | American lawyer and civil rig… | 1919–1995 |
| Kunti | character from Indian epic Ma… | |
| Balbhadra Kunwar | National hero of Nepal | 1789–1823 |
| Werner Kunz | German biologist | 1922 |
| Chiu Kuo-cheng | Taiwanese military officer | 1953 |
| Robert Kuok | Malaysian businessman | 1923 |
| Han Kuo-yu | Taiwanese political figure | 1957 |
| Hsu Kuo-yung | Taiwanese politician | 1958 |
| Charles A. Kupchan | American university teacher | 1958 |
| Tuli Kupferberg | American anarchist, poet, pub… | 1923–2010 |
| Edgar Kupfer-Koberwitz | German journalist, poet and p… | 1906–1991 |
| Hanif Kureishi | English playwright, screenwri… | 1954 |
| Akhtar Aly Kureshy | Pakistani advocate, legal adv… | 1963 |
| Shushanik Kurghinian | Armenian poet | 1876–1927 |
| Tadamichi Kuribayashi | Japanese general | 1891–1945 |
| Verghese Kurien | Indian founder of dairy-coope… | 1921–2012 |
| Chiaki Kuriyama | Japanese actress and singer | 1984 |
| Lynn Kurland | American writer | 2000 |
| Michael Kurland | American writer | 1938 |
| Mark Kurlansky | American journalist | 1948 |
| Akira Kurosawa | Japanese film maker | 1910–1998 |
| Tetsuko Kuroyanagi | Japanese actress | 1933 |
| David Kurten | British politician | 1971 |
| Ernst Kurth | | |
| Albin Kurti | Prime Minister of Kosovo | 1975 |
| Nicholas Kurti | Hungarian physicist | 1908–1998 |
| Paul Kurtz | American professor of philoso… | 1925–2012 |
