District 202 serves students from a 64-square mile area encompassing all or parts of Bolingbrook; Crest Hill; Joliet; Lockport; Naperville; Plainfield; Romeoville and unincorporated Will and Kendall counties.
District 202 is the fifth largest public school system in Illinois by enrollment, behind (in this order) Chicago, Elgin, Rockford and Indian Prairie (Aurora/Naperville), based on 2013-14 State Board of Education data.