#1 Largest Private Schools in New York, NY
Dalton School
Independent school · Grades K–12
1,330 students
New York, NY
A+Overall grade1,330 students6 students per teacher
2026 lists
Largest Private Schools in New York, NY
The private schools in New York, NY with the most students. Top 50 of 108 schools.
#2 Largest Private Schools in New York, NY
Dalton School
Independent school · Grades K–12
1,330 students
New York, NY
A+Overall grade1,330 students6 students per teacher
#3 Largest Private Schools in New York, NY
Columbia Grammar & Preparatory School
Independent school · Grades Pre-K–12
1,138 students
New York, NY
A+Overall grade1,138 students6 students per teacher
#4 Largest Private Schools in New York, NY
Lycee Francais De New York
Independent school · Grades Pre-K–12
1,089 students
New York, NY
A-Overall grade1,089 students10 students per teacher
#5 Largest Private Schools in New York, NY
Trinity School
Christian school (nondenominational) · Grades K–12
1,044 students
New York, NY
A+Overall grade1,044 students7 students per teacher
#6 Largest Private Schools in New York, NY
Xavier High School
Independent Catholic school · Grades 9–12
924 students
New York, NY
A+Overall gradeAll boys924 students14 students per teacher
#7 Largest Private Schools in New York, NY
The Chapin School
Independent school · Grades K–12
825 students
New York, NY
A+Overall gradeAll girls825 students6 students per teacher
#8 Largest Private Schools in New York, NY
Friends Seminary
Quaker (Friends) school · Grades K–12
801 students
New York, NY
B+Overall grade801 students15 students per teacher
#9 Largest Private Schools in New York, NY
The Brearley School
Independent school · Grades K–12
781 students
New York, NY
A+Overall gradeAll girls781 students7 students per teacher
#10 Largest Private Schools in New York, NY
Dwight School
Alternative school · Grades Pre-K–12
780 students
New York, NY
A+Overall grade780 students5 students per teacher
#11 Largest Private Schools in New York, NY
Dwight School
Independent school · Grades Pre-K–12
774 students
New York, NY
A+Overall grade774 students5 students per teacher
#12 Largest Private Schools in New York, NY
The Brearley School
Independent school · Grades K–12
773 students
New York, NY
A+Overall gradeAll girls773 students7 students per teacher
#13 Largest Private Schools in New York, NY
Spence School
Independent school · Grades K–12
772 students
New York, NY
AOverall gradeAll girls772 students6 students per teacher
#14 Largest Private Schools in New York, NY
Spence School
Independent school · Grades K–12
772 students
New York, NY
A+Overall gradeAll girls772 students6 students per teacher
#15 Largest Private Schools in New York, NY
Grace Church High School
Episcopal school · Grades Pre-K–12
762 students
New York, NY
A+Overall grade762 students5 students per teacher
#16 Largest Private Schools in New York, NY
Marymount School of NY
Independent Catholic school · Grades Pre-K–12
715 students
New York, NY
A+Overall gradeAll girls715 students5 students per teacher
#17 Largest Private Schools in New York, NY
Nightingale-Bamford School
Independent school · Grades K–12
707 students
New York, NY
A+Overall gradeAll girls707 students7 students per teacher
#18 Largest Private Schools in New York, NY
Calhoun School
Montessori school · Grades Pre-K–12
578 students
New York, NY
A+Overall grade578 students6 students per teacher
#19 Largest Private Schools in New York, NY
Regis High School
Independent Catholic school · Grades 9–12
529 students
New York, NY
A+Overall gradeAll boys529 students9 students per teacher
#20 Largest Private Schools in New York, NY
St. Ignatius Loyola School
Diocesan school · Grades Pre-K–8
504 students
New York, NY
B+Overall grade504 students14 students per teacher
#21 Largest Private Schools in New York, NY
The Hewitt School
Independent school · Grades K–12
469 students
New York, NY
A+Overall gradeAll girls469 students6 students per teacher
#22 Largest Private Schools in New York, NY
The Browning School
Independent school · Grades K–12
410 students
New York, NY
AOverall gradeAll boys410 students7 students per teacher
#23 Largest Private Schools in New York, NY
The School at Columbia University
Independent school · Grades K–8
405 students
New York, NY
A+Overall grade405 students5 students per teacher
#24 Largest Private Schools in New York, NY
St. Davids School
Independent school · Grades K–8
405 students
New York, NY
A+Overall gradeAll boys405 students3 students per teacher
From official public records, updated October 2026.