#1 Best Private Elementary Schools in San Mateo, CA
Episcopal Day School of St. Matthew
Episcopal school · Grades Pre-K–8
The only Christian school in San Mateo
San Mateo, CA
A+Overall grade290 students6 students per teacher
2026 lists
Best Private Elementary Schools in San Mateo, CA
Private schools in San Mateo, CA with elementary grades and the highest overall grades. Top 6 of 6 schools.
#2 Best Private Elementary 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
#3 Best Private Elementary Schools in San Mateo, CA
The Carey School
Independent school · Grades Pre-K–5
Small classes: about 7 students per teacher
San Mateo, CA
A+Overall grade252 students7 students per teacher
#4 Best Private Elementary Schools in San Mateo, 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
#5 Best Private Elementary 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
#6 Best Private Elementary 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
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.