#1 Largest Private Schools in Orange County, CA
Isea International
Independent school · Grades K–12
7,818 students
Newport Beach, CA
B-Overall grade7,818 students
2026 lists
Largest Private Schools in Orange County, CA
The private schools in Orange County, CA with the most students. Top 50 of 170 schools.
#2 Largest Private Schools in Orange County, CA
Fairmont Private School
Independent school · Grades Pre-K–12
2,391 students
Anaheim, CA
B+Overall grade2,391 students11 students per teacher
#3 Largest Private Schools in Orange County, CA
Jserra Catholic High School
Independent Catholic school · Grades 9–12
1,317 students
San Juan Capistrano, CA
A+Overall grade1,317 students6 students per teacher
#4 Largest Private Schools in Orange County, CA
C4l Academy
Independent school · Grades 9–12
1,237 students
Irvine, CA
B-Overall grade1,237 students
#5 Largest Private Schools in Orange County, CA
St. Margaret S Episcopal School
Episcopal school · Grades Pre-K–12
1,158 students
San Juan Capistrano, CA
A+Overall grade1,158 students10 students per teacher
#6 Largest Private Schools in Orange County, CA
Crean Lutheran High School
Lutheran (Missouri Synod) school · Grades 9–12
1,092 students
Irvine, CA
B+Overall grade1,092 students15 students per teacher
#7 Largest Private Schools in Orange County, CA
St. Junipero Serra Catholic School
Parish school · Grades Pre-K–8
948 students
Rancho Santa Margarita, CA
A+Overall grade948 students16 students per teacher
#8 Largest Private Schools in Orange County, CA
TVT Community Day School
Jewish day school · Grades Pre-K–12
805 students
Irvine, CA
A+Overall grade805 students9 students per teacher
#9 Largest Private Schools in Orange County, CA
St. Mary's School
Christian school (nondenominational) · Grades Pre-K–8
763 students
Aliso Viejo, CA
BOverall grade763 students14 students per teacher
#10 Largest Private Schools in Orange County, CA
Servite High School
Independent Catholic school · Grades 9–12
731 students
Anaheim, CA
A+Overall gradeAll boys731 students16 students per teacher
#11 Largest Private Schools in Orange County, CA
St. Johns Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
724 students
Orange, CA
BOverall grade724 students20 students per teacher
#12 Largest Private Schools in Orange County, CA
Mariners Christian School
Christian school (nondenominational) · Grades K–8
720 students
Costa Mesa, CA
B+Overall grade720 students14 students per teacher
#13 Largest Private Schools in Orange County, CA
St. Edward Parish School
Diocesan school · Grades Pre-K–8
717 students
Dana Point, CA
A-Overall grade717 students15 students per teacher
#14 Largest Private Schools in Orange County, CA
St. Edward the Confessor Parish School
Diocesan school · Grades Pre-K–8
716 students
Dana Point, CA
AOverall grade716 students15 students per teacher
#15 Largest Private Schools in Orange County, CA
Fairmont San Juan Capistrano
Independent school · Grades Pre-K–12
571 students
San Juan Capistrano, CA
B+Overall grade571 students10 students per teacher
#16 Largest Private Schools in Orange County, CA
The Pegasus School
Independent school · Grades Pre-K–8
559 students
Huntington Beach, CA
AOverall grade559 students10 students per teacher
#17 Largest Private Schools in Orange County, CA
Heritage Oak Private Education
Independent school · Grades Pre-K–8
553 students
Yorba Linda, CA
BOverall grade553 students14 students per teacher
#18 Largest Private Schools in Orange County, CA
Grace Christian School
Christian school (nondenominational) · Grades Pre-K–8
545 students
Cypress, CA
AOverall grade545 students12 students per teacher
#19 Largest Private Schools in Orange County, CA
St. Bonaventure
Parish school · Grades K–8
535 students
Huntington Beach, CA
B+Overall grade535 students20 students per teacher
#20 Largest Private Schools in Orange County, CA
Fairmont Private Schools Anaheim Hills
Independent school · Grades Pre-K–8
530 students
Anaheim, CA
B-Overall grade530 students17 students per teacher
#21 Largest Private Schools in Orange County, CA
St. Francis of Assisi School
Diocesan school · Grades Pre-K–8
527 students
Yorba Linda, CA
A+Overall grade527 students16 students per teacher
#22 Largest Private Schools in Orange County, CA
Mission Viejo Christian School
Christian school (nondenominational) · Grades K–8
510 students
Mission Viejo, CA
B-Overall grade510 students17 students per teacher
#23 Largest Private Schools in Orange County, CA
St. John the Baptist Catholic School
Diocesan school · Grades K–8
505 students
Costa Mesa, CA
A+Overall grade505 students17 students per teacher
#24 Largest Private Schools in Orange County, CA
Newport Christian School
Baptist school · Grades Pre-K–12
499 students
Newport Beach, CA
A+Overall grade499 students15 students per teacher
From official public records, updated October 2026.