Si
- Siamese Lakes
- Sibbeston Lake
- Sicamous
- Sicannie Chief
- Sickle Point
- Sid Lake
- Sidley Creek
- Sidney
- Sidney
- Sidney
- Sidney Creek
- Sidney Inlet
- Sidney Lake
- Sidney Mines
- Sidney Webb Point
- Sievright Point
- Sifton Lake
- Siggia
- Sight Point
- Signai
- Sigoligjuak
- Sigutlat Lake
- Sikanni
- Sikanni
- Sikanni Chief River
- Sikosak Bay
- Siksik Point
- Silcox
- Silcox Creek
- Silecia
- Silent
| - Silent Hills
- Silesia Creek
- Silicia
- Sillem Island
- Sillery
- Silliman Mountain
- Silliman's Fossil Mountain
- Silsby Lake
- Siltaza Lake
- Silton
- Silver Cove
- Silver Islet
- Silver Lake
- Silver Mountain
- Silver Mountain
- Silver Park
- Silverbow River
- Silverdale
- Simcoe
- Simcoe County
- Similkameen River
- Simmie
- Simmonds Barasway
- Simmonds Point
- Simmons Peninsula
- Simon Peak
- Simonds Channel
- Simonette River
- Simonhouse Lake
- Simoom Sound
- Simoon Sound
| - Simpson
- Simpson
- Simpson Bay
- Simpson Group
- Simpson Island
- Simpson Islands
- Simpson Lake
- Simpson Lake
- Simpson Lake
- Simpson Mountains
- Simpson Peninsula
- Simpson Range
- Simpson Strait
- Simpson Tower
- Simpson's
- Sims Lake
- Sinclair Creek
- Sinclair Falls
- Sinclair Lake
- Sinclair Point
- Singer Inlet
- Sinking Lake
- Sinnamoxt Glacier
- Sintaluta
- Siorak Brook
- Siorarsuk Peninsula
- Sioux Lookout
- Sipiwesk
- Sipiwesk Lake
- Sir Bibby Island
- Sir Charles Hamilton Sound
| - Sir Everard Home's
- Sir George Moore Islands
- Sir Humphrey Davy
- Sir James Ross Strait
- Sir John Barrow Monument
- Sir John Barrows Monument
- Sir Richard Goodwin Keats
- Sir Thomas Rowe's Welcome
- Sir William Parker Strait
- Sirdad Junction
- Sirdar
- Sisib Lake
- Sisipuk Lake
- Sister Islets
- Sitdown Creek
- Sitidgi Lake
- Sittakanay Mountain
- Sittakanay River
- Sittikanay River
- Siugaktuk Island
- Siwash
- Siwash Creek
- Siwash Creek
- Six Mile Bay
- Six Mile Creek
- Sixteen Mile Brook
- Sixteen Mile Creek
- Sixteen Mile Creek
- Sixteen Mile Creek
- Sixteen Mile Creek
- Sixtymile Creek
- Sixtymile River
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