World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Siain, Luzon | PHSIN | Philippines (the) |
| Siak Yechil, Riau | IDSIA | Indonesia |
| Siam Bangkok Port | THSBP | Thailand |
| Siamgas and Petrochemicals | THSSW | Thailand |
| Siari/Ozamis | PHSIR | Philippines (the) |
| Siavonga | ZMSIA | Zambia |
| Siay/Zamboanga | PHSIY | Philippines (the) |
| Siaya | KESIA | Kenya |
| Sibenik | HRSIB | Croatia |
| Sibolga, Sumatra | IDSLG | Indonesia |