Saint Mary's High School (SMHS), founded in 1876, is a Roman Catholic, co-educational, college preparatory school in Stockton, California. The school is under the canonical jurisdiction of the Diocese of Stockton and sponsored by the Salesian order of the Oblates of St. Francis de Sales priests and brothers (Toledo–Ohio Province). The school is a member of the College Board and is accredited by the Western Association of Schools and Colleges and by the Western Catholic Education Association.