World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Ozuku | JPOZU | Japan |
| Øksfjord | NOOKF | Norway |
| Ølen | NOOLN | Norway |
| Ølve | NOOLV | Norway |
| Ørland | NOOLA | Norway |
| Ørnes | NOSVI | Norway |
| Ørskog | NOOSG | Norway |
| Ørsta | NOORS | Norway |
| Øygarden | NOOYG | Norway |
| Paagoumène | NCPAA | New Caledonia |