Independent School League (Illinois)

This article is about the high school athletic conference in Greater Chicago. For the high school athletic conference in Greater Boston, see Independent School League (New England). For the high school athletic conference in Greater Washington D.C., see Independent School League (Washington, D.C. area).
Independent School League (Illinois)
ConferenceIHSA
No. of teams9
RegionChicago metro area, Illinois

The Independent School League (ISL) is an athletic conference comprising 9 private secondary schools in the Chicago metro area. All but one of the schools are also full members of the Illinois High School Association, the governing body for most high school athletics and competitive activities in the state. The schools are all relatively small, most belonging to the smaller classes of competition offered by the IHSA.