World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Sidney | USS7I | United States of America (the) |
| Sidoarjo | IDSDJ | Indonesia |
| Sidvokodvo | SZ7DS | Eswatini |
| Sidwell | ZASID | South Africa |
| Siennica Rózana | PLSCA | Poland |
| Sierra Vista | USSI7 | United States of America (the) |
| Sigatsuaru Väikesadam | EESIG | Estonia |
| Sigavé | WFSIG | Wallis and Futuna |
| Sigayan/Parang | PHSIG | Philippines (the) |
| Sigerfjord | NOSRD | Norway |