#1 Fastest-Growing Private Schools in Marin County, CA
Oak Hill School
Special education school · Ungraded
Enrollment up 62% in about a decade
San Anselmo, CA
AOverall grade52 students7 students per teacher
2026 lists
Fastest-Growing Private Schools in Marin County, CA
Private schools in Marin County, CA whose enrollment has grown the most over the past decade. Top 10 of 10 schools.
#2 Fastest-Growing Private Schools in Marin County, CA
The New Village School
Independent school · Grades Pre-K–8
Enrollment up 44% in about a decade
Sausalito, CA
AOverall grade92 students6 students per teacher
#3 Fastest-Growing Private Schools in Marin County, CA
Star Academy
Special education school · Grades 4–12
Enrollment up 37% in about a decade
San Rafael, CA
AOverall grade89 students8 students per teacher
#4 Fastest-Growing Private Schools in Marin County, CA
Montessori De Terra Linda
Montessori school · Grades Pre-K–6
Enrollment up 26% in about a decade
San Rafael, CA
A-Overall grade96 students6 students per teacher
#5 Fastest-Growing Private Schools in Marin County, CA
San Domenico School
Independent school · Grades K–12
Enrollment up 25% in about a decade
San Anselmo, CA
A+Overall grade679 students7 students per teacher
#6 Fastest-Growing Private Schools in Marin County, CA
St. Raphael School
Parish school · Grades Pre-K–8
Enrollment up 22% in about a decade
San Rafael, CA
A+Overall grade193 students14 students per teacher
#7 Fastest-Growing Private Schools in Marin County, CA
St. Isabella School
Parish school · Grades K–8
Enrollment up 15% in about a decade
San Rafael, CA
BOverall grade285 students20 students per teacher
#8 Fastest-Growing Private Schools in Marin County, CA
Marin Academy
Independent school · Grades 9–12
Enrollment up 13% in about a decade
San Rafael, CA
AOverall grade459 students8 students per teacher
#9 Fastest-Growing Private Schools in Marin County, CA
The Branson School
Independent school · Grades 9–12
Enrollment up 12% in about a decade
Ross, CA
A+Overall grade370 students7 students per teacher
#10 Fastest-Growing Private Schools in Marin County, CA
Marin Catholic High School
Diocesan school · Grades 9–12
Enrollment up 11% in about a decade
Kentfield, CA
A+Overall grade791 students14 students per teacher
From official public records, updated October 2026.