World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Saint Louis | USUTS | United States of America (the) |
| Saint Louis | USSTL | United States of America (the) |
| Saint Louis | USOK9 | United States of America (the) |
| Saint Margaret's Hope | GBSGP | United Kingdom |
| Saint Margaret's Hope, South Ronaldsay | GBSMH | United Kingdom |
| Saint Martins | GBSQK | United Kingdom |
| Saint Mary's | GBSVZ | United Kingdom |
| Saint Mary's | TTFPT | Trinidad and Tobago |
| Saint Marys Bay | GBSMA | United Kingdom |
| Saint Mawes | GBSMV | United Kingdom |