The Lexicon entries below explore significant Holocaust-related events, topics, places and personalities and are based on Yad Vashem's Encyclopedia of the Holocaust.
- Kaiserwald
- Kaltenbrunner, Ernst
- Kamenets-Podolski
- Karski, Jan
- Kasztner, Rezso
- Katzenelson, Itzhak
- Katzmann, Fritz
- Kaufering
- Kazasov, Dimo
- Kazinets, Isay Pavlovich
- Keitel, Wilhelm
- Kiddush ha-Hayyim
- Kiddush Ha-Shem
- Kielce
- Killing Sites, The
- Klooga
- Koch, Karl and Ilse
- Komoly, Otto
- Korczak, Janusz
- Kostas, Nikolaou
- Kovner, Abba
- Kovno
- Kramer, Josef
- Kripo
- Kristallnacht
- Kube, Wilhelm