John Ferraby (January 9, 1914 – September 5, 1973) was a British Bahá'í born in Southsea, England, into a liberal Jewish family.
He was educated at Malvern College and King's College, Cambridge, to which he won a major scholarship.
He became a Bahá'í in 1941 and was elected as secretary of the National Spiritual Assembly, which he remained until 1959.In October 1957, Ferraby was appointed a Hand of the Cause of God by Shoghi Effendi.
From 1959 to 1963, he served as one of the nine Custodians at the Bahá'í World Centre in Haifa, Israel.