Encyclopedias, Almanacs, Transcripts, and Maps
- Kivi, Aleksis
- Klages, Ludwig (1872–1956)
- Klarsfeld, Serge (b. 1935)
- Klee, Paul (1879–1940)
- Klemens von Metternich
- Klemperer, Victor (1881–1960)
- Klock's Field, New York
- Klondike Gold Strike
- Knapsacks and the Soldiers' Burden
- Knight, Sarah Kemble
- Knight, Sarah Kemble
- Knights and the Traditions of Chivalry
- Knights Break Color Line
- Knowlton, Thomas
- Knox's "Noble Train of Artillery"
- Knox, John (c. 1513–1572)
- Knyphausen, Wilhelm, Baron von
- Koch, Marita
- Kodja Mimar Sinan
- Koestler, Arthur (1905–1983)