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2026 lists

Largest Private Schools in Philadelphia, PA

The private schools in Philadelphia, PA with the most students. Top 50 of 107 schools.

#25 Largest Private Schools in Philadelphia, PA

Immaculate Heart of Mary School

Parish school · Grades Pre-K–8

334 students

Philadelphia, PA

B-Overall grade334 students27 students per teacher

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From official public records, updated October 2026.

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