Chicago High School for Agricultural Sciences ("CHSAS") is a public 4–year magnet high school located in the Mount Greenwood neighborhood on the far south side of Chicago, Illinois, United States. The school is operated by the Chicago Public Schools district. CHSAS opened for the 1985–86 school year in August 1985. The school is located on a 72-acre campus, 40 acres of which are dedicated to a working farm, and the students commute from all across the city to CHSAS.