Benet Academy ( ) is a co-educational, college-preparatory, Benedictine high school in Lisle, Illinois, United States, overseen by the Diocese of Joliet. Founded in 1887, the school was initially established in Chicago as the all-boys St. Procopius College and Academy by Benedictine monks, who also operated the St. Joseph Bohemian Orphanage. In 1898, the orphanage moved to Lisle, about west of Chicago, to be joined by St. Procopius three years later. In 1926, Benedictine nuns constructed the all-girls Sacred Heart Academy near the orphanage and school in Lisle. The orphanage closed in 1956 to make room for St. Procopius Academy, which separated from the college in 1957. Due to rising costs and waning enrollment, Sacred Heart merged with St. Procopius Academy in 1967 to form Benet Academy on the St. Procopius campus. Since then, numerous building projects have been undertaken to expand Benet's athletics, music, and science programs. As of 2017 it is considered the second best Catholic high school in Illinois, and seventh best private high school.