World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Kohzujima | JPKOU | Japan |
| Kõiguste | EEKGS | Estonia |
| Koike/Uwajima | JPKOI | Japan |
| Koilas Ermionidos | GRKIN | Greece |
| Koilthottum | INKOI | India |
| Koja | IDKOJ | Indonesia |
| Kojonkulma | FIKOJ | Finland |
| Koka | INKOK | India |
| Kökar | FIKKR | Finland |
| Kokas | IDKOK | Indonesia |