#1 Largest Private Schools in Philadelphia County, PA
Springside Chestnut Hill Academy
Independent school · Grades Pre-K–12
1,058 students
Philadelphia, PA
A+Overall grade1,058 students8 students per teacher
2026 lists
Largest Private Schools in Philadelphia County, PA
The private schools in Philadelphia County, PA with the most students. Top 50 of 107 schools.
#2 Largest Private Schools in Philadelphia County, PA
Springside Chestnut Hill Academy-Upper
Independent school · Grades Pre-K–12
1,058 students
Philadelphia, PA
B+Overall grade1,058 students8 students per teacher
#3 Largest Private Schools in Philadelphia County, PA
St. Joseph's Preparatory School
Independent Catholic school · Grades 9–12
938 students
Philadelphia, PA
B+Overall gradeAll boys938 students13 students per teacher
#4 Largest Private Schools in Philadelphia County, PA
Archbishop Ryan High School
Diocesan school · Grades 9–12
870 students
Philadelphia, PA
BOverall grade870 students19 students per teacher
#5 Largest Private Schools in Philadelphia County, PA
Father Judge High School
Diocesan school · Grades 9–12
774 students
Philadelphia, PA
B-Overall gradeAll boys774 students20 students per teacher
#6 Largest Private Schools in Philadelphia County, PA
Our Lady of Calvary School
Diocesan school · Grades Pre-K–8
610 students
Philadelphia, PA
B-Overall grade610 students17 students per teacher
#7 Largest Private Schools in Philadelphia County, PA
Sts. John Neumann & Maria Garetti Catholic High SCH
Diocesan school · Grades 9–12
578 students
Philadelphia, PA
B-Overall grade578 students23 students per teacher
#8 Largest Private Schools in Philadelphia County, PA
Cristo Rey Philadelphia High School
Independent Catholic school · Grades 9–12
545 students
Philadelphia, PA
BOverall grade545 students18 students per teacher
#9 Largest Private Schools in Philadelphia County, PA
St. Cecilia Elementary School
Parish school · Grades Pre-K–8
477 students
Philadelphia, PA
BOverall grade477 students17 students per teacher
#10 Largest Private Schools in Philadelphia County, PA
St. Katherine of Siena School
Parish school · Grades Pre-K–8
469 students
Philadelphia, PA
B-Overall grade469 students16 students per teacher
#11 Largest Private Schools in Philadelphia County, PA
St. Monica School
Diocesan school · Grades K–8
459 students
Philadelphia, PA
B-Overall grade459 students21 students per teacher
#12 Largest Private Schools in Philadelphia County, PA
West Catholic Prep High School
Diocesan school · Grades 9–12
454 students
Philadelphia, PA
B-Overall grade454 students16 students per teacher
#13 Largest Private Schools in Philadelphia County, PA
West Catholic Preparatory H.S.
Diocesan school · Grades 9–12
453 students
Philadelphia, PA
B+Overall grade453 students15 students per teacher
#14 Largest Private Schools in Philadelphia County, PA
St. Francis De Sales Schools
Diocesan school · Grades Pre-K–8
446 students
Philadelphia, PA
BOverall grade446 students19 students per teacher
#15 Largest Private Schools in Philadelphia County, PA
St. Hubert Catholic High School for Girls
Diocesan school · Grades 9–12
445 students
Philadelphia, PA
BOverall gradeAll girls445 students20 students per teacher
#16 Largest Private Schools in Philadelphia County, PA
Politz Hebrew Academy
Jewish day school · Grades K–8
437 students
Philadelphia, PA
B-Overall grade437 students11 students per teacher
#17 Largest Private Schools in Philadelphia County, PA
Maternity BVM School
Diocesan school · Grades Pre-K–8
417 students
Philadelphia, PA
BOverall grade417 students21 students per teacher
#18 Largest Private Schools in Philadelphia County, PA
St. Matthew
Parish school · Grades Pre-K–8
395 students
Philadelphia, PA
B+Overall grade395 students15 students per teacher
#19 Largest Private Schools in Philadelphia County, PA
Little Flower Catholic High School for Girls
Diocesan school · Grades 9–12
393 students
Philadelphia, PA
B+Overall gradeAll girls393 students17 students per teacher
#20 Largest Private Schools in Philadelphia County, PA
The Philadelphia School
Alternative school · Grades Pre-K–8
371 students
Philadelphia, PA
AOverall grade371 students7 students per teacher
#21 Largest Private Schools in Philadelphia County, PA
Gesu School
Independent Catholic school · Grades Pre-K–8
360 students
Philadelphia, PA
BOverall grade360 students13 students per teacher
#22 Largest Private Schools in Philadelphia County, PA
St. Martin De Porres School
Independent Catholic school · Grades Pre-K–8
355 students
Philadelphia, PA
B-Overall grade355 students15 students per teacher
#23 Largest Private Schools in Philadelphia County, PA
Mercy Career & Technical High School
Independent Catholic school · Grades 9–12
347 students
Philadelphia, PA
BOverall grade347 students13 students per teacher
#24 Largest Private Schools in Philadelphia County, PA
Blessed Trinity Regional Catholic School
Diocesan school · Grades Pre-K–8
340 students
Philadelphia, PA
B+Overall grade340 students15 students per teacher
From official public records, updated October 2026.