- Kahn, Herman3
- Katkov, George3
- Kennedy, John F.3
- Kershaw, Ian3
- Koestler, Arthur3
- Kohn, Hans3
- Kommunisticheskaia partiia Sovetskogo Soiuza3
- Korboński, Stefan3
- Kotkin, Stephen3
- Kovrig, Bennett3
- Kundera, Milan3
- Lane, David Stuart3
- Lang, David Marshall3
- Lasswell, Harold D.3
- Lendvai, Paul3
- Lenin, Vladimir Ilʹich3
- Levine, Isaac Don3
- Lukacs, John3
- Macartney, C. A.3
- Magyar, Bálint3