World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Osaka | JPOSA | Japan |
| Osaka, Tottori | JPOUK | Japan |
| Osaki, Kagoshima | JPOSX | Japan |
| Osaki, Miyagi | JPOSK | Japan |
| Osaki/Mitsushima | JPOSN | Japan |
| Osako | JPOJO | Japan |
| Osato | JPOTO | Japan |
| Osborne Island | AUOSB | Australia |
| Osceola | USM2S | United States of America (the) |
| Osen | NOOSN | Norway |