- Schomberg Heights
- Schreiber
- Schutt
- Science Hill
- Scoble West
- Scotch Block
- Scotch Bush
- Scotch Bush
- Scotch Corners
- Scotch Line
- Scotch Point
- Scotch Settlement
- Scotia
- Scott Settlement
- Scott Settlement
- Scotts Landing
- Scudder
- Scugog
- Scugog Centre
- Scugog Point
- Sea Breeze
- Sebastopol
- Sebringville
- Seckerton
- Seeley
- Seguin Falls
- Sellars
- Selton
- Selwyn
- Senecal