| 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 |