- Kafka, Franz – Austrian (Czechoslovakian-born) author
- Kahlo, Frida – Mexican painter
- Kahn, Alice
- Kaiser, Henry J. – American industrialist
- Kakuzo, Okakura
- Kalmikoff, Jeffrey
- Kant, Immanuel – German philosopher
- Kasten, Tom
- Katsuragi, Misato
- Kaufman, Barry Neil
- Kaufman, Charlie
- Kaufman, Margo
- Kaufman, Samahria Lyte
- Kay, Alan
- Kaye, Danny – American actor & singer
- Keats, John – English lyric poet
- Keillor, Garrison – American humorist & radio broadcaster
- Keller, Helen – American blind & deaf educator
- Kellett, Dave
- Kelley, Virginia
- Kelly, Kevin
- Kelly, Walt – American animator & cartoonist
- Kempis, Thomas a – German mystic & religious author
- Kempton, Sally
- Kennedy, Edward M. – American Democratic politician
- Kennedy, Florynce
- Kennedy, John F. – 35th president of US 1961-1963
- Kennedy, Justice Anthony – American jurist
- Kennedy, Robert F. – American Democratic politician
- Kennedy, Rose – American wife of Joseph Patrick Kennedy Sr.
- Kent, Allegra
- Kent, Corita
- Kerouac, Jack – American novelist
- Kerr, Jean
- Kerry, John – American Democratic politician
- Kesey, Ken – American novelist
- Kettering, Charles F. – American electrical engineer & inventor
- Keyes, Ken Jr.
- Keynes, John Maynard – English economist
- Khan, Hazrat Inayat
- Khanna, Nishank – American (Indian-born) author & entrepreneur
- Khrushchev, Nikita – Russian Soviet politician
- Kidman, Nicole
- Kieran, John – American journalist
- Kierkegaard, Soren – Danish philosopher
- Kilmer, Joyce – American poet
- Kim, Min
- King, Basil
- King, MacKenzie
- King, Martin Luther Jr. – American black civil rights leader & clergyman
- King, Stephen – American horror novelist & screenwriter
- King Charles I
| - King Edward the Third – English king 1327-1377
- King Edward VIII – British king 1936
- King Farouk of Egypt – king of Egypt 1936-1952
- Kingsley, Charles – English Anglican clergyman & novelist
- Kingsley, Rose G.
- Kingsolver, Barbara
- Kingston, Maxine Hong
- Kipling, Rudyard – British (Indian-born) author
- Kissinger, Henry – American (German-born) diplomat & scholar
- Kitselman, A. L.
- Kitt, A. J.
- Klauber, Ted
- Klee, Paul – Swiss Abstractionist painter
- Kleiser, Grenville
- Klem, Jarvis
- Klempner, Joan
- Klosterman, Chuck
- Knebel, Fletcher
- Knight, Bobby – American basketball coach
- Knopf, Alfred A.
- Koch, Sally
- Koenig, Dennis
- Koestler, Arthur – British (Hungarian-born) author
- Koller, Alice
- Kollwitz, Kathe
- Konrad, George
- Kooning, Willem de – American (Dutch-born) painter
- Kopp, Sheldon
- Korzybski, Alfred – American (Polish-born) author, logician, & scientist
- Kossuth
- Kottke, Jason – Designer and weblog writer (kottke.org)
- Kovacs, Ernie
- Kozol, Jonathan
- Kramarae, Cheris
- Kramer, Hilton
- Kraus, Karl – Austrian author and journalist
- Krishnamurti
- Kristofferson, Kris
- Krutch, Joseph Wood – American author & critic
- Kubler-Ross, Elisabeth
- Kubrick, Stanley – British (US-born) movie director
- Kundera, Milan – Czechoslovakian novelist
- Kunitz, Stanley
- Kunkel, Fritz
- Kupcinet, Irv
- Kuprin, Aleksandr Ivanovich
- Kuralt, Charles
- Kurosawa, Akira – Japanese movie director
- Kurtz, Irma
- Kushner, Rabbi Harold
- Kyi, Aung San Suu – Burmese dissident & politician
- Kyne, Peter B.
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