2026 lists

Largest Private Schools in California

The private schools in California with the most students. Top 50 of 1,834 schools.

#49 Largest Private Schools in California

Independent school · Grades Pre-K–12

950 students

San Mateo, CA

A+Overall grade950 students7 students per teacher

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#50 Largest Private Schools in California

Parish school · Grades Pre-K–8

948 students

Rancho Santa Margarita, CA

A+Overall grade948 students16 students per teacher

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From official public records, updated October 2026.