World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Orjaku | EEORJ | Estonia |
| Órjiva | ESORJ | Spain |
| Orkanger | NOORK | Norway |
| Orkdal | NOORD | Norway |
| Orkney | GBORK | United Kingdom |
| Orléans | CAOLS | Canada |
| Ormara | PKORW | Pakistan |
| Ormoc/Tacloban | PHORC | Philippines (the) |
| Órmos Panórmou | GRPNT | Greece |
| Örnsköldsvik | SEOER | Sweden |