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- Sephardic Rabbinate of Ontario - Thornhill, Ontario
- Shaar Shalom Synagogue - Thornhill, Ontario
- Shaarei Beth-El Synagogue - Oakville, Ontario
- Shaarei Shomayim Congregation - Toronto
- Shaarei Tefillah Congregation - North York
- Shaarei Tzedek Synagogue (The Markham Shul) - Toronto pre-1940 synagogue
- Shomrai Shabos Synagogue - North York
- Solel Congregation Synagogues - Mississauga, Ontario
- Stashover-Slipia Congregation
Read more about this topic: List Of Synagogues In The Greater Toronto Area