| Port Code | Port Name | Country |
| CASEB | Seven Islands Bay | Canada |
| CASED | Sedgewick | Canada |
| CASEH | Sexsmith | Canada |
| CASEI | Sept-Iles | Canada |
| CASEL | Selkirk | Canada |
| CASEM | Seldom | Canada |
| CASEP | St Ephrem-de-Beauce | Canada |
| CASER | Stettler | Canada |
| CASEU | St Eustache | Canada |
| CASEZ | St Elzéar/La Nouvelle-Beau | Canada |
| CASFE | St Félicien | Canada |
| CASFH | Seaforth | Canada |
| CASFM | Sheffield Mills | Canada |
| CASFO | Ste Foy | Canada |
| CASFV | Stouffville | Canada |
| CASGA | St Gabriel | Canada |
| CASGB | St Georges/Beauce-Sartigan | Canada |
| CASGD | St-Germain-de-Grantham | Canada |
| CASGE | St George | Canada |
| CASGG | St Georges | Canada |
| CASGH | Shag Harbour | Canada |
| CASGN | Saint-Germain-de-Grantham | Canada |
| CASHA | Shawinigan | Canada |
| CASHB | Schreiber | Canada |
| CASHE | Shediac | Canada |
| CASHH | Sheet Harbour | Canada |
| CASHI | St Hilaire | Canada |
| CASHK | Sherkston | Canada |
| CASHL | Shallows Lake | Canada |
| CASHM | Schumacher | Canada |
| CASHN | St Henri | Canada |
| CASHO | Saint-Hippolyte | Canada |
| CASHP | Shippegan | Canada |
| CASHR | Sherrington | Canada |
| CASHS | St Honoré-de-Shenley | Canada |
| CASHU | Saint-Hubert | Canada |
| CASHY | St Hyacinthe | Canada |
| CASIC | Simcoe | Canada |
| CASJA | Fort St James | Canada |
| CASJB | St John | Canada |
| CASJC | Saint-Jean-Chrysostome | Canada |
| CASJD | St Jeanile-d'Orleans | Canada |
| CASJE | St Jérôme | Canada |
| CASJF | St John's | Canada |
| CASJH | St Joseph's | Canada |
| CASJJ | Saint Jacques | Canada |
| CASJL | St Joseph-du-Lac | Canada |
| CASJN | Ste Justine-de-Newton | Canada |
| CASJQ | St Jacques le Mineur | Canada |
| CASJR | St Jean-sur-Richelieu | Canada |
| CASJS | Saint Jacobs | Canada |
| CASJU | Ste Julienne | Canada |
| CASJV | Saint-Janvier | Canada |
| CASKI | Charlotte (Skidegate) | Canada |
| CASKP | Shakespeare Island | Canada |
| CASLA | Saint-Laurent | Canada |
| CASLB | Shelburne | Canada |
| CASLE | St Leonard | Canada |
| CASLT | St Lambert | Canada |
| CASLU | St Luc | Canada |
| CASLV | Saulnierville | Canada |
| CASLW | St Lawrence | Canada |
| CASLZ | St Lazare-de-Vaudreuil | Canada |
| CASMA | Ste Madeleine | Canada |
| CASMB | Ste Marie | Canada |
| CASMC | St Marc-des-Carrières | Canada |
| CASMF | Smiths Falls | Canada |
| CASMH | St Mathieu-d'Harricana | Canada |
| CASMI | Sydney Mines | Canada |
| CASML | Ste Marthe-sur-le-Lac | Canada |
| CASMQ | St Michel-des-Saints | Canada |
| CASMS | St Marys | Canada |
| CASMV | Smithville | Canada |
| CASMY | St Marys | Canada |
| CASNI | Sarnia | Canada |
| CASNP | Stanstead Plain | Canada |
| CASNT | Saint-Charles-Borromée | Canada |
| CASOE | Strathmore | Canada |
| CASOM | Sombra | Canada |
| CASOO | Sooke | Canada |
| CASOR | Sorel | Canada |
| CASOU | Souris | Canada |
| CASPA | Saint-Pascal | Canada |
| CASPB | Saint-Paul-d'Abbotsford | Canada |
| CASPD | Springdale | Canada |
| CASPE | Sprague | Canada |
| CASPG | Spruce Grove | Canada |
| CASPI | Saint-Pierre | Canada |
| CASPL | St Paul | Canada |
| CASPO | Springhill | Canada |
| CASPP | St Perpetue | Canada |
| CASPR | Spragge | Canada |
| CASPT | Saint-Esprit | Canada |
| CASPV | Spencerville | Canada |
| CASPW | Sparwood | Canada |
| CASQA | Squamish | Canada |
| CASQE | Saint Quentin | Canada |
| CASRC | Star City | Canada |
| CASRE | Ste Rosalie | Canada |
| CASRI | Sable River | Canada |