#1 Largest Private Schools in Fullerton, CA
Rosary Academy
Diocesan school · Grades 9–12
464 students
Fullerton, CA
A+Overall gradeAll girls464 students13 students per teacher
2026 lists
Largest Private Schools in Fullerton, CA
The private schools in Fullerton, CA with the most students. Top 7 of 7 schools.
#2 Largest Private Schools in Fullerton, CA
St. Juliana Falconieri School
Parish school · Grades K–8
272 students
Fullerton, CA
BOverall grade272 students23 students per teacher
#3 Largest Private Schools in Fullerton, CA
Arborland Montessori-Hughes Campus
Montessori school · Grades Pre-K–8
152 students
Fullerton, CA
B+Overall grade152 students8 students per teacher
#4 Largest Private Schools in Fullerton, CA
Ivycrest Montessori Private School - Chapman
Montessori school · Grades K–6
95 students
Fullerton, CA
B+Overall grade95 students9 students per teacher
#5 Largest Private Schools in Fullerton, CA
Eastside Christian Schools
Christian school (nondenominational) · Grades Pre-K–12
90 students
Fullerton, CA
AOverall grade90 students6 students per teacher
#6 Largest Private Schools in Fullerton, CA
Eastside Christian
Christian school (nondenominational) · Grades K–12
90 students
Fullerton, CA
A-Overall grade90 students4 students per teacher
#7 Largest Private Schools in Fullerton, CA
Stepping Stones Academy
Early childhood program · Kindergarten only
21 students
Fullerton, CA
B+Overall grade21 students21 students per teacher
From official public records, updated October 2026.