#25 Largest Private Schools in Cook County, IL
British International School of Chicago South Loop
Independent school · Grades Pre-K–12
638 students
Chicago, IL
BOverall grade638 students10 students per teacher
2026 lists
Largest Private Schools in Cook County, IL
The private schools in Cook County, IL with the most students. Top 50 of 339 schools.
From official public records, updated October 2026.