- St Lawrence Hall
- St Lawrence Iroquoians
- Thousand Islands National Park (formerly St Lawrence Islands National Park)
- St. Lawrence Lowland
- St. Lawrence River
- St. Lawrence Seaway
- St Lawrence String Quartet
- St. Margarets Bay
- St Mary Magdalene Singers
- St Marys
- St Mary's Bay
- St Mary's Church
- St Marys River (NS)
- St Marys River (Ont)
- St. Michael's Choir School