World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Sulkava | FISVK | Finland |
| Sullom Voe | GBSUL | United Kingdom |
| Sultan Kudarat/Dadiangas | PHSKU | Philippines (the) |
| Sulzbach-Laufen | DESLZ | Germany |
| Sulzberg | DEZB4 | Germany |
| Sumarcarcer | ESSUM | Spain |
| Sumartin | HRSMN | Croatia |
| Sumbawa | IDSWQ | Indonesia |
| Sumbe | AONDD | Angola |
| Sumenep | IDSUM | Indonesia |