Human beings, each considered as a single actor within society
Featured Individuals
- Konkin III, Samuel Edward (1947-2004) - Proponent of agorism and author of the New Libertarian Manifesto (1980)
Notable Individuals
- Kelley, David (1949- ) - Founder and Executive Director of The Objectivist Center
- Kennedy, John F. (1917-1963) - Thirty-fifth president of the United States
- Kirzner, Israel (1930- ) - Professor of Economics at New York University
- Klausner, Manny ( -2025) - American lawyer, co-founding editor of Reason magazine
- Knight, Frank (1885-1972) - 20th century American economist of the Chicago School
Other Individuals
- Kahn, Alfred E. (1917-2010) - Professor of economics, chairman of Civil Aeronautics Board in the late 1970s
- Kaminsky, Stuart M. (1934-2009) - Novelist, screenwriter, biographer, recipient of Edgar Allan Poe Award for A Cold Red Sunrise
- Kauffman, Bill (1959- ) - Author, associate editor of The American Enterprise
- Kaye, Tomasz - Animator, illustrator and web designer
- Kay, Karen - American romance novelist of Choctaw Indian descent
- Kazan, Elia (1909-2003) - American movie director, producer and writer
- Kazin, Alfred (1915-1998) - Writer and literary critic
- Keating, Kenneth (1900-1975) - Politician, United States senator from New York (1959-1965)
- Keaton, Diane (1946- ) - American film and stage actress, winner of Best Actress Oscar for Annie Hall
- Kefauver, Estes (1903-1963) - Politician, United States senator from Tennessee (1949-1963)
- Kelley, Augustine B. (1883-1957) - Politician, member of the United States House of Representatives from Pennsylvania (1941-1957)
- Kennedy (1972- ) - Former host of various MTV programs
- Kennedy, Robert F. (1925-1968) - Lawyer and politician, United States senator from New York (1965-1968)
- Keynes, John Maynard (1883-1946) - English economist, author of The General Theory of Employment, Interest and Money
- Khrushchev, Nikita (Никита Хрущёв; 1894-1971) - Russian politician, General Secretary of the Communist Party of the Soviet Union (1953-1964)
- Kilby, Jack (1923-2005) - Electrical engineer, contributor to the development of integrated circuits
- Kilgore, Harley M. (1893-1956) - Politician, United States senator from West Virginia (1941-1956)
- King, A. D. (1911-1987) - Baptist minister and civil rights activist, younger brother of Martin Luther King, Jr.
- King, Jr., Martin Luther (1929-1968) - Baptist minister and civil rights activist, honored with 1964 Nobel Peace Prize
- Kingsley, Ben (1943- ) - British actor, Oscar winner for title role in Ghandi
- Kirk, Russell (1873-1945) - American conservative political theorist, author of The Conservative Mind (1953)
- Klein, Daniel B. (1962- ) - Associate Professor of Economics at Santa Clara University
- Kling, Arnold (1954- ) - Economist and blogger
- Knapp, Thomas L. - Libertarian activist, director of The William Lloyd Garrison Center for Libertarian Advocacy Journalism
- Kober, Stanley - Former Research Fellow in Foreign Policy Studies at the Cato Institute
- Koch, David (1940-2019) - Executive VP of Koch Industries, 1980 Libertarian Vice Presidential candidate
- Kolko, Gabriel (1932-2014) - American historian, author of The Triumph of Conservatism (1963)
- Koman, Victor (1954- ) - American science fiction writer, winner of the 1997, 1990 and 1988 Prometheus Awards
- Koontz, Dean (1945- ) - Bestselling novelist
- Kopel, Dave (1960- ) - Attorney, author, research director of the Independence Institute
- Kostelanetz, Richard (1940- ) - American writer, artist, critic and editor
- Kramer, John - Vice President for Strategic Relations of the Institute for Justice
- Kramer, Kenny (1943- ) - Stand-up comedian who inspired the Cosmo Kramer character in "Seinfeld"
- Kramer, Stanley (1913-2001) - American movie director and producer
- Kristol, Irving (1930-2009) - Journalist, author of Reflections of a Neo-conservative: Looking Back, Looking Ahead (1983)
- Krupa, Gene (1909-1973) - Jazz drummer and composer
- Kubby, Steve (1946-2022) - Author, 1998 LP California Governor candidate, 2008 LP U.S. President aspirant
- Kubrick, Stanley (1928-1999) - American film director, notable for Dr. Strangelove, 2001: A Space Odissey and other works
- Kumārajīva (344-413) - Buddhist monk, noted for translating various Sanskrit text into Chinese
- Kwiatkowski, Karen (1960- ) - Retired U.S. Air Force lieutenant colonel, columnist for MilitaryWeek.com