World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Southwold | GBSWD | United Kingdom |
| Souvala | GRSLA | Greece |
| Soverato | ITSOO | Italy |
| Sovetsk | RUSSK | Russian Federation (the) |
| Sovetskaya Gavan | RUSOG | Russian Federation (the) |
| Sövik | NOSOV | Norway |
| Soya | JPSOY | Japan |
| Soyo | AOSZA | Angola |
| Soyo-Quinfuquena Terminal | AOSOQ | Angola |
| Sozopol | BGSOZ | Bulgaria |