Alumni
- William Levada, Prefect of the Congregation of the Doctrine of the Faith
- Justin Rigali, Archbishop of Philadelphia
- Roger Mahony, Archbishop of Los Angeles
- George Niederauer, Archbishop of San Francisco
- Tod Brown, Bishop of Orange
- Geoff Farrow, priest relieved of his congregation after denouncing California Proposition 8 from the pulpit
- Msgr. Francis J. Weber, archivist of the Los Angeles Archdiocese, and biographer of Archbishop John Joseph Cantwell, Cardinal James Francis McIntyre, and Cardinal Timothy Manning
- Bishop Jaime Soto of the Diocese of Sacramento
- Gustavo García-Siller, archbishop of San Antonio.
- William DuBay, ordained in 1960, but left the priesthood after challenging Cardinal McIntyre on race relations and other matters.
Read more about this topic: St. John's Seminary (California)