#1 Private Schools with the Smallest Classes in San Mateo County, CA
The Primary School - East Palo Alto
Independent school · Grades Pre-K–6
5 students per teacher
East Palo Alto, CA
AOverall grade255 students5 students per teacher
2026 lists
Private Schools with the Smallest Classes in San Mateo County, CA
Private schools in San Mateo County, CA with the fewest students per teacher (not counting preschools and special education schools). Top 46 of 46 schools.
#2 Private Schools with the Smallest Classes in San Mateo County, CA
Ronald C Wornick Jewish Day School
Jewish day school · Grades K–8
5.1 students per teacher
Foster City, CA
A-Overall grade199 students5 students per teacher
#3 Private Schools with the Smallest Classes in San Mateo County, CA
Field Middle School
Independent school · Grades 6–8
5.1 students per teacher
Belmont, CA
A-Overall gradeAll boys45 students5 students per teacher
#4 Private Schools with the Smallest Classes in San Mateo County, CA
Serendipity School
Independent school · Grades K–5
5.5 students per teacher
Belmont, CA
A+Overall grade147 students6 students per teacher
#5 Private Schools with the Smallest Classes in San Mateo County, CA
Episcopal Day School of St. Matthew
Episcopal school · Grades Pre-K–8
5.8 students per teacher
San Mateo, CA
A+Overall grade290 students6 students per teacher
#6 Private Schools with the Smallest Classes in San Mateo County, CA
Hilldale School
Independent school · Grades K–8
6.4 students per teacher
Daly City, CA
A+Overall grade162 students6 students per teacher
#7 Private Schools with the Smallest Classes in San Mateo County, CA
The Nueva School
Independent school · Grades Pre-K–12
7.1 students per teacher
San Mateo, CA
A+Overall grade950 students7 students per teacher
#8 Private Schools with the Smallest Classes in San Mateo County, CA
Odyssey School
Independent school · Grades 6–8
7.1 students per teacher
San Mateo, CA
AOverall grade50 students7 students per teacher
#9 Private Schools with the Smallest Classes in San Mateo County, CA
Synapse School
Independent school · Grades K–8
7.2 students per teacher
Menlo Park, CA
A+Overall grade327 students7 students per teacher
#10 Private Schools with the Smallest Classes in San Mateo County, CA
The Carey School
Independent school · Grades Pre-K–5
7.2 students per teacher
San Mateo, CA
A+Overall grade252 students7 students per teacher
#11 Private Schools with the Smallest Classes in San Mateo County, CA
Hillside Christian Academy
Christian school (nondenominational) · Grades Pre-K–7
7.2 students per teacher
South San Francisco, CA
AOverall grade49 students7 students per teacher
#12 Private Schools with the Smallest Classes in San Mateo County, CA
Immaculate Heart of Mary School
Parish school · Grades Pre-K–8
7.8 students per teacher
Belmont, CA
A+Overall grade100 students8 students per teacher
#13 Private Schools with the Smallest Classes in San Mateo County, CA
Woodland School
Independent school · Grades Pre-K–8
7.9 students per teacher
Portola Valley, CA
A+Overall grade272 students8 students per teacher
#14 Private Schools with the Smallest Classes in San Mateo County, CA
Trinity School
Episcopal school · Grades Pre-K–5
8.1 students per teacher
Menlo Park, CA
A+Overall grade129 students8 students per teacher
#15 Private Schools with the Smallest Classes in San Mateo County, CA
Wilkinson School
Independent school · Grades K–8
8.3 students per teacher
El Granada, CA
A-Overall grade40 students8 students per teacher
#16 Private Schools with the Smallest Classes in San Mateo County, CA
Menlo School
Independent school · Grades 6–12
8.8 students per teacher
Atherton, CA
B-Overall grade818 students9 students per teacher
#17 Private Schools with the Smallest Classes in San Mateo County, CA
Crystal Springs Uplands School
Independent school · Grades 6–12
8.8 students per teacher
Hillsborough, CA
B+Overall grade569 students9 students per teacher
#18 Private Schools with the Smallest Classes in San Mateo County, CA
Belmont Oaks Academy
Independent school · Grades Pre-K–5
9.3 students per teacher
Belmont, CA
A-Overall grade227 students9 students per teacher
#19 Private Schools with the Smallest Classes in San Mateo County, CA
Sea Crest School
Independent school · Grades Pre-K–8
9.5 students per teacher
Half Moon Bay, CA
A-Overall grade280 students10 students per teacher
#20 Private Schools with the Smallest Classes in San Mateo County, CA
Pacific Bay Christian School
Christian school (nondenominational) · Grades 6–12
9.9 students per teacher
Pacifica, CA
A+Overall grade181 students10 students per teacher
#21 Private Schools with the Smallest Classes in San Mateo County, CA
Mid-Peninsula High School
Independent school · Grades 9–12
10.2 students per teacher
Menlo Park, CA
B+Overall grade126 students10 students per teacher
#22 Private Schools with the Smallest Classes in San Mateo County, CA
Woodside Priory School
Independent Catholic school · Grades 6–12
10.4 students per teacher
Portola Valley, CA
A+Overall grade427 students10 students per teacher
#23 Private Schools with the Smallest Classes in San Mateo County, CA
St. Raymond Elementary School
Diocesan school · Grades K–8
10.8 students per teacher
Menlo Park, CA
AOverall grade241 students11 students per teacher
#24 Private Schools with the Smallest Classes in San Mateo County, CA
Holy Angels School
Parish school · Grades Pre-K–8
10.8 students per teacher
Colma, CA
A+Overall grade117 students11 students per teacher
From official public records, updated October 2026.