Italo Gismondi (August 12, 1887 in Rome, Italy – December 2, 1974 in Rome) was an Italian archaeologist. He entered the Amministrazione delle Antichità e Belle Arti in 1910 and was named Director of the Ostia excavations where he remained for 44 years. From 1919 to 1938 he also served as the superintendent of antiquities for the city of Rome. Ostia was the primary focus of Gismondi's work and he made fundamental contributions to its study. Gismondi was particularly interested in architectonic aspects of ancient building.