| Kaiser-Wilhelms-Land |
| Kalat |
| Kampuchea |
| Karelia, Eastern |
| Kazakhstan |
| Kedah |
| Kelantan |
| Kenya |
| Kiangsu |
| Kiautschou |
| Kingdom of Serbs, Croats and Slovenes |
| Kiribati |
| Klaipeda |
| Knyphausen |
| Kolhapur |
| "Komuch" |
| Korea (till 1910) |
| Korea (North) |
| Korea (South) |
| Kotaringin |
| Kuban People's Republic |
| Kutch |
| Kuwait |
| Kwangtung |
| Kyrgyzstan |