K
- Ernst Kaltenbrunner (1903–1946) Chief of the SD, the SiPo & the RSHA after Reinhard Heydrich's assassination. Highest-ranking Nazi official to stand trial at Nuremberg. Executed by hanging.
- Omar Khadr, Canadian convicted for murder and supporting terrorism
- Dietrich Klagges (1891–1971), German politician and premier (Ministerpräsident) of Braunschweig
- Fritz Knoechlein (1911–1949), SS Obersturmbannführer, convicted and executed for war crimes (Le Paradis massacre)
- Ilse Koch (1906–1967), German female officer at Buchenwald and Sachsenhausen concentration camps
- Dragan Kolundžija (born 1959), Bosnian Serb, sentenced to 3 years for Keraterm camp
- Dario Kordić (born 1960), Bosnian Croat, sentenced to 25 years
- Milojica Kos, Bosnian Serb, sentenced to 6 years for Omarska camp
- Radomir Kovač (born 1961), Bosnian Serb sentenced to 20 years
- Momčilo Krajišnik, Bosnian Serb politician, sentenced to 27 years
- Milorad Krnojelac, Bosnian Serb sentenced to 7,5 years for Foča massacres. Following appeal, his sentence was raised to 15 years
- Radislav Krstić, Bosnian Serb sentenced to 46 years (35 following appeal) for his part in the Srebrenica massacre, also found guilty of being an accomplice to genocide, first such ruling at ICTY
- Alfred Krupp {1907–1967} German Steel/Arms maker; Involved in slave labor
- Dragoljub Kunarac (born 1960), Bosnian Serb sentenced to 28 years
- Franz Kutschera (1904–1944), German SS general and Gauleiter of Carinthia.
- Miroslav Kvocka, Bosnian Serb, sentenced to 7 years for Omarska camp
Read more about this topic: List Of Convicted War Criminals