#1 Largest Private Schools in Downers Grove, IL
St. Mary of Gostyn Catholic School
Parish school · Grades Pre-K–8
419 students
Downers Grove, IL
BOverall grade419 students15 students per teacher
2026 lists
Largest Private Schools in Downers Grove, IL
The private schools in Downers Grove, IL with the most students. Top 7 of 7 schools.
#2 Largest Private Schools in Downers Grove, IL
St. Joseph
Diocesan school · Grades Pre-K–8
371 students
Downers Grove, IL
BOverall grade371 students16 students per teacher
#3 Largest Private Schools in Downers Grove, IL
Avery Coonley School
Independent school · Grades Pre-K–8
290 students
Downers Grove, IL
AOverall grade290 students7 students per teacher
#4 Largest Private Schools in Downers Grove, IL
Downers Grove Christian School
Baptist school · Grades Pre-K–8
153 students
Downers Grove, IL
BOverall grade153 students15 students per teacher
#5 Largest Private Schools in Downers Grove, IL
Marquette Manor Baptist Academy
Baptist school · Grades Pre-K–12
135 students
Downers Grove, IL
BOverall grade135 students13 students per teacher
#6 Largest Private Schools in Downers Grove, IL
Good Shepherd Lutheran Academy
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
29 students
Downers Grove, IL
AOverall grade29 students7 students per teacher
#7 Largest Private Schools in Downers Grove, IL
Pathway Montessori
Montessori school · Kindergarten only
20 students
Downers Grove, IL
B+Overall grade20 students20 students per teacher
From official public records, updated October 2026.