- Kalinin, Mihail
- Kalinin, Mihail
- Kalinin, Mihail
- Kamenev, Lev
- Kandahar: Archontology
- Kandahar: Polity Style: 1880-1881
- Karelia: Archontology
- Karelia: Chairman of the Central Executive Committee: 1923-1938
- Karelia: Chairman of the Council of People's Commissars: 1923-1940
- Karelia: Chairman of the Executive Committee: 1921-1923
- Karelia: Chairman of the Presidium of the Supreme Council: 1938-1940
- Karelia: Chairman of the Presidium of the Supreme Council: 1940-1956
- Karelia: Chairman of the Revolutionary Committee: 1920-1921
- Karelia: Chairmen of the Council of Ministers: 1946-1956
- Karelia: Chairmen of the Council of People's Commissars: 1923-1940
- Karelia: Polity Style: 1920-1940
- Karelia: Polity Style: 1940-1956
- Karelia: Sources
- Karl I.
- Katanga: Archontology
- Katanga: Heads of State: 1960-1963
- Katanga: Polity Style: 1880-1963
- Katanga: Rulers: 1880-1900
- Kazakhstan: Archontology
- Kazakhstan: Chairman of the Supreme Council: 1990
- Kazakhstan: Chairmen of the Central Executive Committee: 1920-1938
- Kazakhstan: Chairmen of the Presidium of the Supreme Council: 1938-1990
- Kazakhstan: Chairmen of the Revolutionary Committee: 1919-1920
- Kazakhstan: Heads of State: 1991-2025
- Kazakhstan: Polity Style: 1920-1991
- Kazakhstan: Polity Style: 1991-2025
- Kazakhstan: President of the Republic: 1990-1991
- Kazakhstan: Sources
- Kennedy, John
- Kentucky: Archontology
- Kentucky: Notes
- Kentucky: Polity Style: 1792-2025
- Kentucky: Sources
- Kentucky: State Governors: 1792-1867
- Kenya: Archontology
- Kenya: Gazette 1964-04-21
- Kenya: Governors-General: 1963-1964
- Kenya: Heads of State: 1963-1964
- Kenya: Heads of State: 1964-2025
- Kenya: Polity Style: 1963-2025
- Kenya: Sources
- Kerenskij, Aleksandr Fedorovič
- Khokhlov, Ivan Sergeyevich
- KHRUSHCHEV, Nikita Sergeevič
- Kiesinger, Kurt Georg
- Kingdom of Etruria: Archontology
- Kingdom of Etruria: Kings: 1801-1807
- Kingdom of Etruria: Polity Style: 1801-1807
- Kingdom of Italy: Archontology
- Kingdom of Italy: King: 1805-1814
- Kingdom of Italy: Polity Style: 1805-1814
- Kingdom of Italy: Presidents of the Provisional Regency: 1814
- Kingdom of Italy: Viceroy: 1805-1814
- Kingdom of Naples: Archontology
- Kingdom of Naples: Kings: 1806-1815
- Kingdom of Naples: Polity Style: 1806-1815
- Kingdom of the Two Sicilies: Archontology
- Kingdom of the Two Sicilies: Dictator: 1860
- Kingdom of the Two Sicilies: Kings: 1816-1860
- Kingdom of the Two Sicilies: Polity Style: 1816-1860
- Kirchschläger, Rudolf
- Kiribati: Archontology
- Kiribati: Heads of State: 1979-2025
- Kiribati: Polity Style: 1979-2025
- Klerk, Frederik Willem de
- Klerk, Johannes de
- Klestil, Thomas
- Kohl, Helmut Josef Michael
- Korea (Democratic People's Republic of): Archontology
- Korea (Democratic People's Republic of): Chairman of the State Affairs Commission: 2016-2025
- Korea (Democratic People's Republic of): Chairmen of the National Defence Commission: 1993-2016
- Korea (Democratic People's Republic of): Heads of State: 1948-2025
- Korea (Democratic People's Republic of): Polity Style: 1948-2025
- Korea (Democratic People's Republic of): Sources
- Korea (Republic of): Archontology
- Korea (Republic of): Chairmen of the Supreme Council for National Reconstruction: 1961-1963
- Korea (Republic of): Heads of State: 1948-1963
- Korea (Republic of): Heads of State: 1963-2025
- Korea (Republic of): Polity Style: 1948-2025
- Korea (Republic of): Sources
- Korea: Archontology
- Korea: Emperors: 1897-1910
- Korea: Kings: 1274-1392
- Korea: Kings: 1392-1897
- Korea: Kings: 918-1274
- Korea: Military Occupation (North): 1945-1948
- Korea: Notes
- Korea: Polity Style: 1393-1910
- Korea: Polity Style: 918-1393
- Korea: Sources
- KOSYGIN, Aleksej Nikolajevich (USSR)
- Kosygin, Aleksey Nikolayevich
- Kosygin, Aleksey Nikolayevich
- Kubitschek de Oliveira, Juscelino
- Kuwait: Archontology
- Kuwait: Head of Provisional Government: 1990
- Kuwait: Heads of State: 1752-1990
- Kuwait: Heads of State: 1991-2025
- Kuwait: Polity Style: 1752-2025
- Kuwait: Sources
- Kuznecov, Vasilij
- Kyrgyzstan: Archontology
- Kyrgyzstan: Chairman of the Executive Committee: 1925-1927
- Kyrgyzstan: Chairman of the Revolutionary Committee: 1924-1925
- Kyrgyzstan: Chairman of the Supreme Council: 1990
- Kyrgyzstan: Chairmen of the Council of Ministers: 1946-1990
- Kyrgyzstan: Chairmen of the Council of People's Commissars: 1927-1946
- Kyrgyzstan: Chairmen of the Presidium of the Supreme Council: 1938-1990
- Kyrgyzstan: Heads of Government: 1990-2021
- Kyrgyzstan: Heads of Government: 2021-
- Kyrgyzstan: Heads of State: 1990-2025
- Kyrgyzstan: Polity Style: 1924-1990
- Kyrgyzstan: Polity Style: 1990-2025
- Kyrgyzstan: President of the Republic: 1990
- Kyrgyzstan: Sources
- Károly IV (IV. Károly)
- Köhler, Horst
- Körner, Theodor
Last update: 20 Jan 2025