#1 Largest Private Schools in San Diego County, CA
Cathedral Catholic High School
Diocesan school · Grades 9–12
1,669 students
San Diego, CA
BOverall grade1,669 students17 students per teacher
2026 lists
Largest Private Schools in San Diego County, CA
The private schools in San Diego County, CA with the most students. Top 50 of 140 schools.
#2 Largest Private Schools in San Diego County, CA
Mater Dei Catholic High School
Diocesan school · Grades K–12
1,659 students
Chula Vista, CA
B-Overall grade1,659 students16 students per teacher
#3 Largest Private Schools in San Diego County, CA
Francis W Parker School
Independent school · Grades Pre-K–12
1,280 students
San Diego, CA
BOverall grade1,280 students11 students per teacher
#4 Largest Private Schools in San Diego County, CA
Francis Parker School
Independent school · Grades Pre-K–12
1,276 students
San Diego, CA
BOverall grade1,276 students11 students per teacher
#5 Largest Private Schools in San Diego County, CA
Mater Dei Catholic H.S.
Diocesan school · Grades 9–12
1,146 students
Chula Vista, CA
A+Overall grade1,146 students17 students per teacher
#6 Largest Private Schools in San Diego County, CA
La Jolla Country Day School
Independent school · Grades Pre-K–12
1,110 students
La Jolla, CA
AOverall grade1,110 students9 students per teacher
#7 Largest Private Schools in San Diego County, CA
Santa Fe Christian Schools
Christian school (nondenominational) · Grades K–12
1,077 students
Solana Beach, CA
AOverall grade1,077 students12 students per teacher
#8 Largest Private Schools in San Diego County, CA
Brookshire International Academy
Independent school · Grades 9–12
1,035 students
La Mesa, CA
B-Overall grade1,035 students
#9 Largest Private Schools in San Diego County, CA
Maranatha Christian Schools
Christian school (nondenominational) · Grades Pre-K–12
855 students
San Diego, CA
AOverall grade855 students13 students per teacher
#10 Largest Private Schools in San Diego County, CA
The Bishop's School
Episcopal school · Grades 6–12
800 students
La Jolla, CA
A+Overall grade800 students7 students per teacher
#11 Largest Private Schools in San Diego County, CA
Tri-City Christian School
Christian school (nondenominational) · Grades Pre-K–12
765 students
Vista, CA
BOverall grade765 students15 students per teacher
#12 Largest Private Schools in San Diego County, CA
Academy of Our Lady of Peace
Independent Catholic school · Grades 9–12
730 students
San Diego, CA
A+Overall gradeAll girls730 students18 students per teacher
#13 Largest Private Schools in San Diego County, CA
St. Augustine High School
Independent Catholic school · Grades 9–12
729 students
San Diego, CA
A+Overall gradeAll boys729 students11 students per teacher
#14 Largest Private Schools in San Diego County, CA
St. Michael's School
Diocesan school · Grades Pre-K–8
558 students
Poway, CA
A+Overall grade558 students18 students per teacher
#15 Largest Private Schools in San Diego County, CA
St. Patrick Catholic School
Diocesan school · Grades K–8
478 students
Carlsbad, CA
BOverall grade478 students21 students per teacher
#16 Largest Private Schools in San Diego County, CA
Christian Elementary School-East Campus
Christian school (nondenominational) · Grades Pre-K–6
476 students
El Cajon, CA
BOverall grade476 students16 students per teacher
#17 Largest Private Schools in San Diego County, CA
The Rock Academy
Christian school (nondenominational) · Grades Pre-K–12
466 students
San Diego, CA
A+Overall grade466 students11 students per teacher
#18 Largest Private Schools in San Diego County, CA
Ocean View Christian Academy
Baptist school · Grades Pre-K–12
432 students
San Diego, CA
BOverall grade432 students18 students per teacher
#19 Largest Private Schools in San Diego County, CA
Human Factor Leadership Academy
Christian school (nondenominational) · Grades Pre-K–12
396 students
San Diego, CA
B-Overall grade396 students26 students per teacher
#20 Largest Private Schools in San Diego County, CA
Calvary Christian Academy
Christian school (nondenominational) · Grades Pre-K–8
358 students
Chula Vista, CA
BOverall grade358 students16 students per teacher
#21 Largest Private Schools in San Diego County, CA
St. Joseph Academy
Independent Catholic school · Grades K–12
355 students
San Marcos, CA
B+Overall grade355 students15 students per teacher
#22 Largest Private Schools in San Diego County, CA
Bright Horizon Academy
Islamic school · Grades Pre-K–12
322 students
San Diego, CA
AOverall grade322 students11 students per teacher
#23 Largest Private Schools in San Diego County, CA
Victory Christian Academy
Lutheran (Missouri Synod) school · Grades K–12
316 students
Chula Vista, CA
A+Overall grade316 students14 students per teacher
#24 Largest Private Schools in San Diego County, CA
St. Rose of Lima School
Parish school · Grades Pre-K–8
315 students
Chula Vista, CA
B+Overall grade315 students20 students per teacher
From official public records, updated October 2026.