| Kıvılcımlı, Hikmet (1902-1971) |
Köhler, Bruno (1900-89) |
| König, Arthur (1881-1945) |
Kabakchiev, Khristo (1878-1940) |
| Kadets |
KAG |
| Kaganovich, Lazar (1893-1991) |
Kagarlitsky, Boris (b. 1958) |
| Kahlo, Frida (1907-1954) |
Kahr, Gustav Ritter von (1862-1934) |
| Kaledin, General Alexis |
Kalinin, Mikhail (1875-1946) |
| Kamenev, Leon (1883-1936) |
Kamenev, Lev Borisovich (1883-1936) |
| Kamenka, Eugene (1928-1995) |
Kamocki |
| Kampffmeier, Paul (1864-1945) |
Kangrga, Milan (1923-2008) |
| Kant, Immanuel (1724-1804) |
Kant, Immanuel (1724-1804) |
| Kanu, Sanyal (1932-2010) |
KAP |
| KAPD |
Kaplan, Faina (Fanny) (1890-1918) |
| Kapp putsch |
Kapp, Wolfgang (1858-1922) |
| Kara-Gadiyev |
Karalasingham, Vaithianathan (1921– 83) |
| Karkal, Ramanath Pandurang (“Ramesh”) (1926–2003) |
Karl I (1887-1922) |
| Kasian, Sarkis Ivanovich [Ter-Kasparian] (1876-1937) |
Kasparova, Varsenika (1888-1941) |
| Katayama, Sen (1859-1933) |
Katterfeld, Ludwig (Carr) (1881-1974) |
| Katz, Ivan (1889–1956) |
Kautsky, Karl (1854-1938) |
| Kautsky, Karl (1854-1938) |
Kautsky, Karl (1854-1938) |
| Kautsky, Minna (1837-1912) |
Kavanagh, Jack (1879-1964) |
| Kawakami, Hajime (1879-1946) |
Kaypakkaya, Ibrahim (1949-1973) |
| Kazi Nazrul Islam (1899-1976) |
Keim, Antoine (Ker) (1886-1923) |
| Keller, Helen (1880-1968) |
Keller. See Fiedler, Franciszek. |
| Kellogg Pact of 1928 |
Kemal Pasha, Mustafa [Atatürk] (1881-1938) |
| Kemalism |
Ker |
| Keracher, John (1880-1958) |
Kerensky, Alexander (1881-1970) |
| Kerensky, Alexander (1882-1970) |
Kerošević, Juro (b. 1900) |
| Kerran, F.L. (1883-1949) |
Kerzhentsev, Platen M. (1881-1940) |
| Key, Ellen (1849 - 1926) |
Keynes, John Maynard (1883-1946) |
| Keynes, John Neville (1852-1949) |
Khan, Zahrul Hasan |
| Khinchuk, L.M. (1868-1944) |
Khinchuk, Lev Mikhailovich (1868-1944) |
| Khiva |
Khlestakov |
| Khomskaya, Yevgenia (b. 1929) |
Khrushchev, Nikita (1894-1971) |
| Kibalchich, Liuba Russakova (1898-1984) |
Kierkegaard, Søren (1813-1855) |
| Kiernan, V.G. (1913-2009) |
Kilbom, Karl (1885-1961) |
| Kilian, Otto (1879–1945) . |
Kind |
| Kingissepp, Viktor (1888-1922) |
Kippenberger, Hans (also known as Leo and Alfred Langer, 1898–1937) . |
| Kiràly, Albert (1883-1939) |
Kirov, Sergei (1886-1934) |
| Kiselev, Aleksey Semenovich (1879 - 1937) |
Kit Kitych |
| Kitchener, Horatio Herbert (1850-1916) |
Kitchlew, Saifuddin (1888-1963) |
| Kitz, Frank (1848 - 1923) |
Klavs-Klavins |
| Kleine, August (Samuel Haifiz, a.k.a. Guralski) (1885-1960) |
Klement, Rudolf (1908-1938) |
| Knief, Johann (1880–1919) . |
Knight, Joseph R. [Morgan] |
| Knights of Labor |
Knowledge (Althusser) |
| Kobetsky, Mikhail (1881-1937) |
Kobis, Alwin (1892–1917) . |
| Kobler, Aleksandar (1889-1974) |
Kodial, Raghuvir |
| Koenen, Bernhard (1889–1964) . |
Koenen, Wilhelm (1886–1963) . |
| Koenen, Wilhelm (1886-1963) |
Koestler, Arthur (1905-1983) |
| Koffka, Kurt (1886-1941) |
Kojève, Alexandre (1902-1968) |
| Kokoshkin, Fedor Felorovich (1871-1918) |
Kolarov, Vasil (1877-1950) |
| Kolarov, Vassili (1877–1950) . |
Kolchak, Aleksandr Vasilievich (1874-1920) |
| Kolchak, Alexander V. (1873-1920) |
Koley, Satyen |
| Kolkhoz (Collective Farm) |
Kollontai, Alexandra (1872-1952) |
| Kollontai, Alexandra Mikhailovna (1872-1952) |
Kolokol |
| Kolpe, Sitaram B. (1919– 2002) |
Kommunist |
| Kommunistische Arbeiter-Zeitung |
Kommunistischer Gewerkschafter |
| Kon, Feliks (1864-1941) |
Kondratiev, Nikolai (1892-1938) |
| Konornaov, Alexander Ivanovich (1875- ) |
Koren, Ludevit (1896-1958) |
| Korfanty, Wojciech (1873-1939) |
Koritschoner, Franz (1892-1941) |
| Kornilov, Konstantin (1879-1957) |
Kornilov, Lavr (1870-1918) |
| Kornilov, Lavr (1870-1918) |
Korsch, Karl (1886-1961) |
| Kosambi, Damodar Dharmanand (1907-1966) |
Kosmodemyanskaya, Zoya (1923-1941) |
| Kostrzewa, Wera (Maria Koszutska) (1876-1939) |
Kotelawala, J.C.T. (1910-1992) |
| Kowalski, Wladislaw (Ślusarski) (1883-1937) |
KPD |
| Królikowski, Stefan [Gliński] (1881-1937) |
Krasin, Leonid Borisovich (1870-1926) |
| Krasnov, P. N. |
Kreibich, Karel or Karl (1883-1966) |
| Kreibich, Karl (1883-1966) |
Krestinsky, Nikolai (1883-1938) |
| Krizman, L N (1890-1938) |
Kropotkin, Peter (1842-1921) |
| KRPD |
Krupskaya, Nadezhda (1869-1939) |
| Krupskaya, Nadezhda K. (1869-1939) |
Krylenko, Nikolai (1885-1938) |
| Kucher, Joseph E. |
Kudelli, Praskov’ia Frantsevna (1859-1944) |
| Kugelman, Ludwig (1830-1902) |
Kuhn, Thomas (1922-1996) |
| Kuibyshev, Valerian (1888-1935) |
Kulak |
| Kulaks |
Kuliscioff, Anna (1854-1925) |
| Kulturkampf |
Kun, Béla (1886-1938 or 1939) |
| Kun, Bela (1886-1937) |
Kuomintang (Guomindang) |
| Kurella, Alfred (1895-1975) |
Kurland |
| Kuron, Jacek (1934-2004) |
Kuruma, Samezō (1893-1982) |
| Kuskova, Yekaterina Dmitrievna (1869-1958) |
Kuusinen, Otto (1881–1964) . |
| Kuusinen, Otto (1881-1964) |
|