#1 Largest Private Schools in Marin County, CA
Marin Catholic High School
Diocesan school · Grades 9–12
791 students
Kentfield, CA
A+Overall grade791 students14 students per teacher
2026 lists
Largest Private Schools in Marin County, CA
The private schools in Marin County, CA with the most students. Top 30 of 30 schools.
#2 Largest Private Schools in Marin County, CA
San Domenico School
Independent school · Grades K–12
679 students
San Anselmo, CA
A+Overall grade679 students7 students per teacher
#3 Largest Private Schools in Marin County, CA
Marin Country Day School
Independent school · Grades K–8
597 students
Corte Madera, CA
B+Overall grade597 students9 students per teacher
#4 Largest Private Schools in Marin County, CA
Marin Academy
Independent school · Grades 9–12
459 students
San Rafael, CA
AOverall grade459 students8 students per teacher
#5 Largest Private Schools in Marin County, CA
Mark Day School
Independent school · Grades K–8
386 students
San Rafael, CA
B+Overall grade386 students10 students per teacher
#6 Largest Private Schools in Marin County, CA
The Branson School
Independent school · Grades 9–12
370 students
Ross, CA
A+Overall grade370 students7 students per teacher
#7 Largest Private Schools in Marin County, CA
St. Isabella School
Parish school · Grades K–8
285 students
San Rafael, CA
BOverall grade285 students20 students per teacher
#8 Largest Private Schools in Marin County, CA
Mount Tamalpais School
Independent school · Grades K–8
254 students
Mill Valley, CA
A+Overall grade254 students7 students per teacher
#9 Largest Private Schools in Marin County, CA
St. Hilary School
Diocesan school · Grades K–8
252 students
Tiburon, CA
A+Overall grade252 students13 students per teacher
#10 Largest Private Schools in Marin County, CA
St. Patrick School
Parish school · Grades K–8
247 students
Larkspur, CA
A+Overall grade247 students12 students per teacher
#11 Largest Private Schools in Marin County, CA
Marin Primary & Middle School
Independent school · Grades Pre-K–8
199 students
Larkspur, CA
A+Overall grade199 students5 students per teacher
#12 Largest Private Schools in Marin County, CA
St. Raphael School
Parish school · Grades Pre-K–8
193 students
San Rafael, CA
A+Overall grade193 students14 students per teacher
#13 Largest Private Schools in Marin County, CA
Our Lady of Loretto School
Diocesan school · Grades K–8
184 students
Novato, CA
B+Overall grade184 students15 students per teacher
#14 Largest Private Schools in Marin County, CA
Good Shepherd Lutheran School
Lutheran school · Grades Pre-K–8
178 students
Novato, CA
A+Overall grade178 students7 students per teacher
#15 Largest Private Schools in Marin County, CA
Marin Horizon School
Independent school · Grades Pre-K–8
177 students
Mill Valley, CA
AOverall grade177 students7 students per teacher
#16 Largest Private Schools in Marin County, CA
Marin Montessori School
Montessori school · Grades Pre-K–9
164 students
Corte Madera, CA
B+Overall grade164 students11 students per teacher
#17 Largest Private Schools in Marin County, CA
Marin Waldorf School
Independent school · Grades Pre-K–8
145 students
San Rafael, CA
A+Overall grade145 students3 students per teacher
#18 Largest Private Schools in Marin County, CA
Brandeis Marin
Jewish day school · Grades K–8
140 students
San Rafael, CA
A+Overall grade140 students5 students per teacher
#19 Largest Private Schools in Marin County, CA
Montessori De Terra Linda
Montessori school · Grades Pre-K–6
96 students
San Rafael, CA
A-Overall grade96 students6 students per teacher
#20 Largest Private Schools in Marin County, CA
The New Village School
Independent school · Grades Pre-K–8
92 students
Sausalito, CA
AOverall grade92 students6 students per teacher
#21 Largest Private Schools in Marin County, CA
Star Academy
Special education school · Grades 4–12
89 students
San Rafael, CA
AOverall grade89 students8 students per teacher
#22 Largest Private Schools in Marin County, CA
North Bridge Academy
Special education school · Grades 2–8
82 students
Mill Valley, CA
A-Overall grade82 students4 students per teacher
#23 Largest Private Schools in Marin County, CA
Irene M. Hunt School
Special education school · Grades K–12
63 students
San Anselmo, CA
B+Overall grade63 students10 students per teacher
#24 Largest Private Schools in Marin County, CA
Terra Marin School
Independent school · Grades Pre-K–8
60 students
Mill Valley, CA
A+Overall grade60 students3 students per teacher
From official public records, updated October 2026.