- St. Anthony Mines
- St. Augustine
- Fort St. James
- St. John's Agency
- Fort St. John
- Fort St. Mary
- Saguingue (Saugeen)
- San Francisco
- San Juan (See Belle Vue Sheep Farm)
- Sandwich Islands
- Sandy Lake
- Sandy Lake (Albany River)
- Sandy Narrows
- Fort Sanspareil (See Edmonton)
- Sault Ste. Marie
- Savanne
- Fort Seaborn
- Fort Selkirk
- Senneterre
- Setting River
- Seven Islands
- Severn
- Shell River (Swan River)
- Shell River (English River)
- Shingle Point
- Shoal Lake
- Shoal River
- Fort Simpson (Mackenzie River)
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- Fort Simpson, (Nass) (Lax Kw'alaams)
- Sioux Lookout
- Fort Smith
- Snake Country
- Somerset House (Assiniboine River)
- Somerset House (Turtle Creek)
- Souris River (see Pinehouse, Saskatchewan)
- South Branch House
- South Indian Lake (See Indian Lake)
- South Reindeer Lake
- South River House
- Southampton Island
- Spirit River Ranch
- Split Lake House
- Spokane
- Stikine
- Stoney Creek (Cumberland)
- Stony Creek
- Stuart Lake (See Fort St. James)
- Stupart's Bay
- Sturgeon Creek
- Sturgeon Lake (Albany River)
- Sturgeon Lake (Peace River)
- Sturgeon River
- Sudbury
- Sugluk East
- Sugluk West
- Swampy Lake
- Swan River House
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