| Code | Name | Region |
|---|---|---|
| CASYA | Sandy Bay | SK |
| CASBH | Sandy Beach | QC |
| CAZSJ | Sandy Lake | ON |
| CASF2 | Sanford | MB |
| CAGDU | Sangudo | AB |
| CAYSK | Sanikiluaq | NU |
| CAYSI | Sans Souci | ON |
| CASAR | Sardis | BC |
| CASNI | Sarnia | ON |
| CASSF | Sarsfield | ON |
| CARTO | Sarto | MB |
| CASAK | Saskatoon | SK |
| CAYXE | Saskatoon John G. Diefenbaker Apt | SK |
| CASNE | Saint-theophile | QC |
| CASTH | Saint-thomas | ON |
| CASIT | Saint-thomas | QC |
| CASDH | Saint-thomas-didyme | QC |
| CASTO | Saint-timothee | QC |
| CAZTI | Saint-tite | QC |
| CASUB | Saint-ubald | QC |
| CASRX | Saint-urbain | QC |
| CASUP | Saint-urbain-premier | QC |
| CASVR | Saint-valere | QC |
| CASVQ | Saint-valerien | QC |
| CASVL | Saint-vallier | ON |
| CASVA | Saint-vallier | QC |
| CAQSV | Saint-victor | QC |
| CASVP | Saint-vincent-de-paul | QC |
| CASWC | Saint-wenceslas | QC |
| CASZZ | Saint-zenon | QC |
| CASZC | Saint-zephirin-de-courval | QC |
| CASZT | Saint-zotique | QC |
| CASVF | Salaberry-de-valleyfield | QC |
| CASRA | Saint-roch-de-l'achigan | QC |
| CASRO | Saint-romuald-d'etchemin | QC |
| CASNR | Saint-romuald-d'etchemin | QC |
| CASSU | Saint-samuel | QC |
| CASSA | Saint-sauveur-des-monts | QC |
| CASBI | Saint-sebastien | QC |
| CASFC | Saint-sebastien | QC |
| CASSL | Saint-sebastien/le-haut-richelieu | QC |
| CASSC | Saint-severin | QC |
| CASST | Saint-shotts | NL |
| CASSE | Saint-simeon | QC |
| CASBV | Saint-simeon-de-bonaventure | QC |
| CASMN | Saint-simon | NB |
| CASSB | Saint-simon-de-bagot | QC |
| CASSS | Saint-stanislas | QC |
| CATKS | Saint-stanislas-de-kostka | QC |
| CASTS | Saint-stephen | NB |