#1 Largest Private Schools in Wheaton, IL
St. Francis High School
Independent Catholic school · Grades 9–12
703 students
Wheaton, IL
AOverall grade703 students13 students per teacher
2026 lists
Largest Private Schools in Wheaton, IL
The private schools in Wheaton, IL with the most students. Top 7 of 7 schools.
#2 Largest Private Schools in Wheaton, IL
Clapham School
Christian school (nondenominational) · Grades Pre-K–12
145 students
Wheaton, IL
AOverall grade145 students6 students per teacher
#3 Largest Private Schools in Wheaton, IL
Wheaton Montessori School
Montessori school · Grades Pre-K–9
119 students
Wheaton, IL
B+Overall grade119 students12 students per teacher
#4 Largest Private Schools in Wheaton, IL
Carriers of Light
Islamic school · Grades Pre-K–6
108 students
Wheaton, IL
B+Overall grade108 students11 students per teacher
#5 Largest Private Schools in Wheaton, IL
Clare Woods Academy
Independent Catholic school · Grades K–12
88 students
Wheaton, IL
AOverall grade88 students7 students per teacher
#6 Largest Private Schools in Wheaton, IL
Prairie School of Dupage
Independent school · Grades Pre-K–8
73 students
Wheaton, IL
B+Overall grade73 students8 students per teacher
#7 Largest Private Schools in Wheaton, IL
Dupage Montessori School - Wheaton
Montessori school · Grades Pre-K–K
21 students
Wheaton, IL
A-Overall grade21 students6 students per teacher
From official public records, updated October 2026.