#1 Largest Private Schools in San Mateo, CA
The Nueva School
Independent school · Grades Pre-K–12
950 students
San Mateo, CA
A+Overall grade950 students7 students per teacher
2026 lists
Largest Private Schools in San Mateo, CA
The private schools in San Mateo, CA with the most students. Top 14 of 14 schools.
#2 Largest Private Schools in San Mateo, CA
Jserra Catholic High School
Diocesan school · Grades 9–12
863 students
San Mateo, CA
BOverall gradeAll boys863 students17 students per teacher
#3 Largest Private Schools in San Mateo, CA
Junipero Serra High School
Diocesan school · Grades 9–12
859 students
San Mateo, CA
BOverall gradeAll boys859 students18 students per teacher
#4 Largest Private Schools in San Mateo, CA
St. Matthew Catholic School
Parish school · Grades K–8
625 students
San Mateo, CA
BOverall grade625 students24 students per teacher
#5 Largest Private Schools in San Mateo, CA
St. Gregory School
Diocesan school · Grades K–8
297 students
San Mateo, CA
B+Overall grade297 students19 students per teacher
#6 Largest Private Schools in San Mateo, CA
Episcopal Day School of St. Matthew
Episcopal school · Grades Pre-K–8
290 students
San Mateo, CA
A+Overall grade290 students6 students per teacher
#7 Largest Private Schools in San Mateo, CA
The Carey School
Independent school · Grades Pre-K–5
252 students
San Mateo, CA
A+Overall grade252 students7 students per teacher
#8 Largest Private Schools in San Mateo, CA
St. Timothy School
Diocesan school · Grades K–8
152 students
San Mateo, CA
A+Overall grade152 students15 students per teacher
#9 Largest Private Schools in San Mateo, CA
Centennial Montessori School
Montessori school · Pre-K only
56 students
San Mateo, CA
AOverall grade56 students6 students per teacher
#10 Largest Private Schools in San Mateo, CA
Odyssey School
Independent school · Grades 6–8
50 students
San Mateo, CA
AOverall grade50 students7 students per teacher
#11 Largest Private Schools in San Mateo, CA
Fusion Academy - San Mateo
Alternative school · Grades 6–12
37 students
San Mateo, CA
AOverall grade37 students2 students per teacher
#12 Largest Private Schools in San Mateo, CA
The Burkard School
Special education school · Grades 2–8
34 students
San Mateo, CA
AOverall grade34 students3 students per teacher
#13 Largest Private Schools in San Mateo, CA
Pacific Rim Int'l School
Montessori school · Grades Pre-K–12
23 students
San Mateo, CA
AOverall grade23 students3 students per teacher
#14 Largest Private Schools in San Mateo, CA
Up Academy
Independent school · Grades Pre-K–6
21 students
San Mateo, CA
AOverall grade21 students3 students per teacher
From official public records, updated October 2026.