Flavius Sosipater Charisius (fl. 4th century) was a Latin grammarian.
He was probably an African by birth, summoned to Constantinople to take the place of Euanthius, a learned commentator on Terence. The Ars Grammatica of Charisius, in five books, addressed to his son (not a Roman, as the preface shows), has come down to us in a mutilated condition, the beginning of the first, part of the fourth, and the greater part of the fifth book having been lost. The work, which is merely a compilation, is valuable as containing excerpts from the earlier writers on grammar, who are in many cases mentioned by name: Remmius Palaemon, Julius Romanus, Comminianus.
The edition of Heinrich Keil, in Grammatici Latini, i. (1857), has been superseded by that of Karl Barwick (1925).