#1 Best Private High Schools in San Mateo County, CA
Woodside Priory School
Independent Catholic school · Grades 6–12
100% of graduates go to four-year colleges
Portola Valley, CA
A+Overall grade427 students10 students per teacher
2026 lists
Best Private High Schools in San Mateo County, CA
Private high schools in San Mateo County, CA with the highest overall grades. Top 10 of 10 schools.
#2 Best Private High Schools in San Mateo County, CA
The Nueva School
Independent school · Grades Pre-K–12
The largest independent school in San Mateo
San Mateo, CA
A+Overall grade950 students7 students per teacher
#3 Best Private High Schools in San Mateo County, CA
Pacific Bay Christian School
Christian school (nondenominational) · Grades 6–12
The only Christian school in Pacifica
Pacifica, CA
A+Overall grade181 students10 students per teacher
#4 Best Private High Schools in San Mateo County, CA
Stanford Online High School
Independent school · Grades 7–12
100% of graduates go to four-year colleges
Redwood City, CA
B+Overall grade985 students15 students per teacher
#5 Best Private High Schools in San Mateo County, CA
Mid-Peninsula High School
Independent school · Grades 9–12
95% of graduates go to four-year colleges
Menlo Park, CA
B+Overall grade126 students10 students per teacher
#6 Best Private High Schools in San Mateo County, CA
Crystal Springs Uplands School
Independent school · Grades 6–12
The only independent school in Hillsborough
Hillsborough, CA
B+Overall grade569 students9 students per teacher
#7 Best Private High Schools in San Mateo County, CA
Junipero Serra High School
Diocesan school · Grades 9–12
Serving families in San Mateo since at least 2011
San Mateo, CA
BOverall gradeAll boys859 students18 students per teacher
#8 Best Private High Schools in San Mateo County, CA
Sacred Heart Schools Atherton
Independent Catholic school · Grades Pre-K–12
95% of graduates go to four-year colleges
Atherton, CA
BOverall grade1,144 students
#9 Best Private High Schools in San Mateo County, CA
Jserra Catholic High School
Diocesan school · Grades 9–12
The largest Catholic school in San Mateo
San Mateo, CA
BOverall gradeAll boys863 students17 students per teacher
#10 Best Private High Schools in San Mateo County, CA
Menlo School
Independent school · Grades 6–12
An independent school in Atherton
Atherton, CA
B-Overall grade818 students9 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.