- Shrigley
- Springwater Lakes
- Stanton
- Saginaw
- Saintfield
- Salem
- Sandford
- Scugog
- Scugog Centre
- Scugog Point
- Shirley
- Siloam
- Solina
- St. Christopher
- Starkville
- Sunderland
- Sunrise Beach
- Sunset View
- Seville
- Shedden
- Southwold
- Sparta
- Springfield
- Summers Corners
- Scudder
- Scotch Settlement
- Seouls Corners
- Sharbot Lake
- Simcoe Island
- Snow Road Station