Gaspard Terrasson (October 1680 – 2 January 1752) was a French Oratorian, teaching humanities and afterwards philosophy, and later a well-known preacher.
His oratorical talents were revealed at Troyes, 1711, on delivering the funeral oration of the Dauphin, son of Louis XIV; but he did not devote himself to preaching till after the death in 1723 of his brother André Terrasson, when he fulfilled several engagements which the latter had made.
This work was condemned by the faculty of theology at Paris (1 Sept., 1734), and by the Archbishops of Sens and Embrun, as containing erroneous, schismatical and heretical assertions.
He withdrew to the Diocese of Auxerre where the bishop, Charles de Caylus [fr], a well-known Jansenist, confided to him the care of Treigni.
The sermons of the two brothers were reprinted by Migne in his "Collection des orateurs sacrés", XXIX (Paris, 1849).