World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Orehoved, Falster | DKORE | Denmark |
| Orei | GRORE | Greece |
| Orekhovo-Zuevo | RUHZO | Russian Federation (the) |
| Orford | GBORH | United Kingdom |
| Origami | JPORG | Japan |
| Orino | JPORN | Japan |
| Orissa | INORS | India |
| Orissaare | EEORI | Estonia |
| Oristano | ITQOS | Italy |
| Oriximiná | BRORX | Brazil |