World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Kastellorizou (ex Megísti) | GRKAS | Greece |
| Kastna | EEKSN | Estonia |
| Kastos Island | GRKSI | Greece |
| Kastrup | DKKTP | Denmark |
| Kasulu | ZAKUU | South Africa |
| Kasumi | JPKXS | Japan |
| Kasumigaura | JPKAU | Japan |
| Kasuya | JPASU | Japan |
| Kata | JPKTZ | Japan |
| Katadomari | JPKDR | Japan |