Jean-Marie-Joseph-Arthur Giry (29 February 1848 – 13 November 1899) was a French historian, noted for his studies of France in the Middle Ages. He was born at Trévoux. After rapidly completing his classical studies at the lycée at Chartres, he spent some time in the administrative service and in journalism. He then entered the École Nationale des Chartes, where, under the influence of J. Quicherat, he developed a strong inclination to the study of the Middle Ages. The lectures at the École pratique des hautes études, which he attended from its foundation in 1868, revealed his true bent; and henceforth he devoted himself almost entirely to scholarship.