#1 Largest Private Schools in Petaluma, CA
St. Vincent De Paul Elementary School
Parish school · Grades K–8
192 students
Petaluma, CA
B+Overall grade192 students18 students per teacher
2026 lists
Largest Private Schools in Petaluma, CA
The private schools in Petaluma, CA with the most students. Top 6 of 6 schools.
#2 Largest Private Schools in Petaluma, CA
Harvest Christian School
Christian school (nondenominational) · Grades Pre-K–8
172 students
Petaluma, CA
BOverall grade172 students15 students per teacher
#3 Largest Private Schools in Petaluma, CA
St. Vincent De Paul High School
Parish school · Grades 9–12
169 students
Petaluma, CA
A+Overall grade169 students9 students per teacher
#4 Largest Private Schools in Petaluma, CA
The Spring Hill School
Independent school · Grades Pre-K–8
109 students
Petaluma, CA
A+Overall grade109 students5 students per teacher
#5 Largest Private Schools in Petaluma, CA
Cypress School
Special education school · Grades 8–12
43 students
Petaluma, CA
B+Overall grade43 students9 students per teacher
#6 Largest Private Schools in Petaluma, CA
Cypress Primary School
Special education school · Grades K–10
37 students
Petaluma, CA
B+Overall grade37 students9 students per teacher
From official public records, updated October 2026.