World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Obama, Nagasaki | JPOBB | Japan |
| Oban | GBOBA | United Kingdom |
| Obanos | ESONS | Spain |
| Obatake | JPOOB | Japan |
| Obbola | SEOBB | Sweden |
| Obe, Ehime | JPOBE | Japan |
| Ober-Abtsteinach | DEOAB | Germany |
| Ober-Mörlen | DEORM | Germany |
| Ober-Olm | DEOLM | Germany |
| Obereiderhafen | DEOEX | Germany |