#25 Largest Private Schools in Massachusetts
Fay School
Independent school · Grades K–9
486 students
Southborough, MA
A+Overall grade486 students4 students per teacher
2026 lists
Largest Private Schools in Massachusetts
The private schools in Massachusetts with the most students. Top 50 of 431 schools.
#26 Largest Private Schools in Massachusetts
The Williston Northampton School
Independent school · Grades 7–12
482 students
Easthampton, MA
B+Overall grade482 students8 students per teacher
#27 Largest Private Schools in Massachusetts
British International School of Boston
Independent school · Grades Pre-K–12
481 students
Boston, MA
B+Overall grade481 students9 students per teacher
#28 Largest Private Schools in Massachusetts
Cardinal Spellman High School
Independent Catholic school · Grades 9–12
479 students
Brockton, MA
A+Overall grade479 students11 students per teacher
#29 Largest Private Schools in Massachusetts
The Winsor School
Independent school · Grades 5–12
475 students
Boston, MA
A+Overall gradeAll girls475 students6 students per teacher
#30 Largest Private Schools in Massachusetts
Dana Hall School
Independent school · Grades 5–12
462 students
Wellesley, MA
B+Overall gradeAll girls462 students8 students per teacher
#31 Largest Private Schools in Massachusetts
Bishop Fenwick High School
Independent Catholic school · Grades 9–12
458 students
Peabody, MA
A+Overall grade458 students12 students per teacher
#32 Largest Private Schools in Massachusetts
The Carroll School
Special education school · Grades 1–9
455 students
Lincoln, MA
A+Overall grade455 students3 students per teacher
#33 Largest Private Schools in Massachusetts
St. Michael Elementary School
Parish school · Grades Pre-K–8
454 students
North Andover, MA
B-Overall grade454 students20 students per teacher
#34 Largest Private Schools in Massachusetts
Berkshire School
Independent school · Grades 9–12
430 students
Sheffield, MA
A+Overall grade430 students7 students per teacher
#35 Largest Private Schools in Massachusetts
Notre Dame Academy
Independent Catholic school · Grades 7–12
429 students
Hingham, MA
A+Overall gradeAll girls429 students10 students per teacher
#36 Largest Private Schools in Massachusetts
St. John Paul II School
Diocesan school · Grades 5–12
429 students
Hyannis, MA
A+Overall grade429 students7 students per teacher
#37 Largest Private Schools in Massachusetts
Pope Francis Preparatory School
Independent Catholic school · Grades 9–12
425 students
Springfield, MA
AOverall grade425 students12 students per teacher
#38 Largest Private Schools in Massachusetts
Sacred Hearts School
Diocesan school · Grades Pre-K–8
420 students
Bradford, MA
BOverall grade420 students17 students per teacher
#39 Largest Private Schools in Massachusetts
Bancroft School
Independent school · Grades Pre-K–12
416 students
Worcester, MA
A+Overall grade416 students5 students per teacher
#40 Largest Private Schools in Massachusetts
Lawrence Academy
Independent school · Grades 9–12
415 students
Groton, MA
A-Overall grade415 students7 students per teacher
#41 Largest Private Schools in Massachusetts
The Governors Academy
Independent school · Grades 9–12
413 students
Byfield, MA
AOverall grade413 students7 students per teacher
#42 Largest Private Schools in Massachusetts
Doctor Franklin Perkins School
Special education school · Grade 2
413 students
Lancaster, MA
B-Overall grade413 students13 students per teacher
#43 Largest Private Schools in Massachusetts
St. Paul Diocesan Jr/Sr High School
Parish school · Grades 7–12
406 students
Worcester, MA
A+Overall grade406 students12 students per teacher
#44 Largest Private Schools in Massachusetts
Lawrence Catholic Academy
Diocesan school · Grades Pre-K–8
401 students
Lawrence, MA
B-Overall grade401 students17 students per teacher
#45 Largest Private Schools in Massachusetts
Brimmer & May School
Independent school · Grades Pre-K–12
394 students
Chestnut Hill, MA
A+Overall grade394 students6 students per teacher
#46 Largest Private Schools in Massachusetts
Covenant Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
392 students
Peabody, MA
BOverall grade392 students10 students per teacher
#47 Largest Private Schools in Massachusetts
St. Sebastians School
Independent Catholic school · Grades 7–12
388 students
Needham, MA
A+Overall gradeAll boys388 students5 students per teacher
#48 Largest Private Schools in Massachusetts
Groton School
Episcopal school · Grades 8–12
381 students
Groton, MA
A+Overall grade381 students6 students per teacher
From official public records, updated October 2026.