- Institut zur Erforschung der UdSSR1
- Joffe, Maria1
- Kalubin, Oleg1
- Kaminskaya, Dina1
- Keliuotis, Juozas1
- Kettle, Michael1
- Khrushchev, Nikita Sergeevich1
- Koblitz, Ann Hibner1
- Koch, Hans1
- Koppers, André1
- Kosharovskii, IUlii1
- Kotkin, Stephen1
- Kozlova, A.1
- Kramova, Nadezhda Filippovna1
- Kraśniewska, Wiktoria1
- Krivitsky, W. G.1
- Krivosheina, N. A.1
- Kropotkin, Petr Alekseevich1
- Kuzichkin, Vladimir1
- Lewytzkyj, Borys1