Cities and Communities in North Ontario
(check also Southern Ontario)
| Sachigo | Shabaqua Corner | South Gillies |
| Sagamok | Shebandowan | South Porcupine |
| Saganaga Lake | Sherwood Lake | Spragge |
| St. Charles | Shillington | Stanley |
| Sam Lake | Shining Tree | Starratt-Olsen |
| Sandy Lake | Silver Dollar | State Falls |
| Sapawe | Silver Islet | Stevens |
| Sault Ste. Marie | Sioux Lookout | Stratton |
| Savant Lake | Sioux Narrows | Sultan |
| Schreiber | Skead | Summer Beaver |
| Schumacher | Sleeman | Suomi |
| Searchmont | Smoky Falls | Superior Junction |
| Seine River Village | Smooth Rock Falls | Swastika |
| Sesekinika | Snake Falls |