Saint Justin may refer to:
- Justin Martyr (103–165)
- Justin the Confessor (d. 269)
- Justin de Jacobis (1800–1860), Italian Lazarist missionary who became Vicar Apostolic of Abyssinia and titular Bishop of Nilopolis
- Justin of Chieti, venerated as an early bishop of Chieti, Italy
- Justin of Siponto (c. 4th century), venerated as Christian martyrs by the Catholic Church
- Saint Justin School, a Catholic elementary school in Santa Clara, California
- St Justin Catholic School, a Catholic elementary school in Edmonton, Alberta
See also
edit- San Giustino, commune