World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Sint-Martens-Latem | BESML | Belgium |
| Sinton | US2SI | United States of America (the) |
| Siocon/Zamboanga | PHXSO | Philippines (the) |
| Sioux City | USSUX | United States of America (the) |
| Sipitang, Sabah | MYSPT | Malaysia |
| Sipoo (Sibbo) | FISIP | Finland |
| Sipul | PGSPL | Papua New Guinea |
| Siracusa | ITSIR | Italy |
| Siran | MYSIR | Malaysia |
| Sirevåg | NOSRV | Norway |