Jean Morin (Latin: Joannes Morinus) (1591 – 28 February 1659) was a French theologian and biblical scholar.
He was born in Blois, from Calvinist parents. He learned Latin and Greek at La Rochelle, and continued his studies in Leiden, subsequently moving to Paris. His conversion to the Roman Church is ascribed to Cardinal du Perron.
In 1618 he joined the congregation of the Oratory, and in due course took priest's orders. In 1625 he visited England in the train of Henrietta Maria; in 1640 he was at Rome, on the invitation of Pope Urban VIII, who received him with special favor. He was, however, soon recalled to Paris by Richelieu, and the rest of his life was spent in incessant literary labor.
The Histoire de la délivrance de l'Église chrétienne par l'empereur Constantin, et de la grandeur et souveraineté temporelle donnée a l'Église romaine par les rois de France (1630) gave great offence at Rome, and a Declaration (1654), directed against faults in the administration of the Oratory, was strictly suppressed.
Morin is best known for his biblical and critical work. By his editing of the Samaritan Pentateuch and Targum, in the Paris Polyglott, he gave the first impulse in Europe to the study of this dialect, which he acquired without a teacher (framing a grammar for himself) by the study of manuscripts newly brought to Europe. Not unnaturally, he formed a very exaggerated view of the value of the Samaritan tradition of the text (Exercitationes ecclesiasticae in utrumque Samaritanorum Pentateuchum, 1631). A similar tone of extreme depreciation of the Masoretic Hebrew text, colored by polemical bias against Protestantism, affects his major work, the posthumous Exercitationes biblicae de hebraeici graecique textus sinceritate (1660), in which, following in the footsteps of Cappellus, he brought arguments against the then current theory of the absolute integrity of the Hebrew text and the antiquity of the vowel points.