St. Mary's is a high performance Catholic K-8 school located in the heart of San Francisco. It is part of a community network led by the Paulist Fathers centered with a relationship with Old St. Mary's Cathedral.

Founded in 1921, St. Mary's School is one of the oldest Catholic Schools in the San Francisco Bay Area. Teaching responsibility is skillfully carried out with loving devotion by the Sisters of St. Joseph of Orange, who continue to grace St. Mary's School with their presence.