#1 Largest Private Schools in Lombard, IL
College Preparatory School of America
Islamic school · Grades Pre-K–12
602 students
Lombard, IL
A+Overall grade602 students13 students per teacher
2026 lists
Largest Private Schools in Lombard, IL
The private schools in Lombard, IL with the most students. Top 6 of 6 schools.
#2 Largest Private Schools in Lombard, IL
St. Pius X Elementary School
Parish school · Grades Pre-K–8
300 students
Lombard, IL
B+Overall grade300 students14 students per teacher
#3 Largest Private Schools in Lombard, IL
St. John's Lutheran School
Lutheran (Missouri Synod) school · Grades K–8
158 students
Lombard, IL
BOverall grade158 students10 students per teacher
#4 Largest Private Schools in Lombard, IL
School of Expressive Arts and Learning (SEAL)
Special education school · Grades 2–12
95 students
Lombard, IL
B+Overall grade95 students9 students per teacher
#5 Largest Private Schools in Lombard, IL
Ilm Montessori
Islamic · Montessori · Grades Pre-K–5
81 students
Lombard, IL
B-Overall grade81 students16 students per teacher
#6 Largest Private Schools in Lombard, IL
Trinity Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
41 students
Lombard, IL
AOverall grade41 students6 students per teacher
From official public records, updated October 2026.