#1 Best Catholic Schools in San Mateo, CA
St. Timothy School
Diocesan school · Grades K–8
The smallest classes of any Catholic school in San Mateo
San Mateo, CA
A+Overall grade152 students15 students per teacher
2026 lists
Best Catholic Schools in San Mateo, CA
The highest-graded schools of this kind in San Mateo, CA. Top 5 of 5 schools.
#2 Best Catholic Schools in San Mateo, CA
St. Gregory School
Diocesan school · Grades K–8
One of 5 Catholic schools in San Mateo
San Mateo, CA
B+Overall grade297 students19 students per teacher
#3 Best Catholic Schools in San Mateo, 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
#4 Best Catholic Schools in San Mateo, CA
St. Matthew Catholic School
Parish school · Grades K–8
One of 5 Catholic schools in San Mateo
San Mateo, CA
BOverall grade625 students24 students per teacher
#5 Best Catholic Schools in San Mateo, 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
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.