John of God (1495–1550) was a Portuguese Catholic saint.
John of God, St John of God, or John of God's may also refer to João Teixeira de Faria (born 1942), Brazilian self-proclaimed medium and psychic surgeon Brothers Hospitallers of Saint John of God, Catholic religious institute addressing poverty and mental illness St John of God Hospital (disambiguation)
See also João de Deus (disambiguation), Portuguese for "John of God" , Spanish for "John of God"