World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Siglufjørdur - høfn | ISSIG | Iceland |
| Signy | AQSGN | Antarctica |
| Sigri Lesvou | GRSGR | Greece |
| Sigrion | GRSGI | Greece |
| Sigtuna | SESGT | Sweden |
| Siholmen | NOSIH | Norway |
| Siilinjärvi | FISII | Finland |
| Sijbrandahuis | NLSBS | Netherlands |
| Sijingkat | MYSIJ | Malaysia |
| Sijitun | CNSJT | China |