- Jowitt, Kenneth1
- Juquin, Pierre1
- Kaplan, Karel1
- Kautsky, John H.1
- Kelly, David1
- Kennedy, Malcolm Duncan1
- King-Hall, Stephen1
- Kintner, William R.1
- Kirkpatrick, E. M.1
- Kiss, Artúr1
- Kivinen, Markku1
- Klehr, Harvey1
- Koch, Hans1
- Koestler, Arthur1
- Kolarz, Walter1
- Korbel, Josef1
- Kosinski, Jerzy1
- Kotkin, Stephen1
- Kovrig, Bennett1
- Kovács, Imre1