St. Rita of Cascia High School is an all-male Roman Catholic high school located on the southwest side of Chicago, Illinois, United States. It is located in the Roman Catholic Archdiocese of Chicago, is operated by the Province of Our Mother of Good Counsel, a Catholic jurisdiction of the Order of Saint Augustine, and is a member of the Augustinian Secondary Education Association. It is named for Rita of Cascia (1381-1457), an Italian Augustinian nun and Roman Catholic saint.