Charles-François Toustain (13 October 1700 – 1 July 1754) was a French historian and a member of the Benedictine Congregation of Saint Maur.
Charles-François Toustain was born into a family of note at Repas in the diocese of Séez on 13 October 1700.
After finishing the philosophical and theological course at the Abbey of Fécamp, he was sent to the monastery of Bonne-Nouvelle [fr] at Rouen, to learn Hebrew and Greek.
At the same time he studied Italian, English, German, and Dutch, in order to be able to understand the writers in these languages.
Of general interest among Toustain's personal writings are: La vérité persécutée par l'erreur (2 vols, 1733), a collection of the writings of the Fathers on the persecutions of the first eight centuries; and "L'authorité de miracles dans l'Église" (no date), in which he expounds the opinion of St. Augustine.