Chézy may refer to: People Antoine de Chézy (1718–1798), French hydraulic engineer Antoine-Léonard de Chézy (1773–1832), French orientalist Helmina von Chézy (1783–1856), German journalist, poet and playwright Communes in France Chézy, Allier, in the Allier department Chézy-en-Orxois, in the Aisne department Chézy-sur-Marne, in the Aisne department Other Chézy formula, for river flows