#1 Largest Private Schools in Massachusetts
Central Catholic
Independent Catholic school · Grades 9–12
1,494 students
Lawrence, MA
BOverall grade1,494 students17 students per teacher
2026 lists
Largest Private Schools in Massachusetts
The private schools in Massachusetts with the most students. Top 50 of 431 schools.
#2 Largest Private Schools in Massachusetts
St. Johns Preparatory School
Independent Catholic school · Grades 6–12
1,453 students
Danvers, MA
A-Overall gradeAll boys1,453 students10 students per teacher
#3 Largest Private Schools in Massachusetts
Boston College High School
Independent Catholic school · Grades 7–12
1,439 students
Dorchester, MA
AOverall gradeAll boys1,439 students13 students per teacher
#4 Largest Private Schools in Massachusetts
Phillips Academy
Independent school · Grades 9–12
1,154 students
Andover, MA
A+Overall grade1,154 students6 students per teacher
#5 Largest Private Schools in Massachusetts
Bishop Feehan
Diocesan school · Grades 9–12
1,087 students
Attleboro, MA
A-Overall grade1,087 students12 students per teacher
#6 Largest Private Schools in Massachusetts
Dexter Southfield
Independent school · Grades Pre-K–12
1,038 students
Brookline, MA
A+Overall grade1,038 students5 students per teacher
#7 Largest Private Schools in Massachusetts
Milton Academy
Independent school · Grades K–12
1,030 students
Milton, MA
A+Overall grade1,030 students5 students per teacher
#8 Largest Private Schools in Massachusetts
Xaverian Brothers High School
Independent Catholic school · Grades 7–12
966 students
Westwood, MA
BOverall gradeAll boys966 students15 students per teacher
#9 Largest Private Schools in Massachusetts
St. John's High School
Independent Catholic school · Grades 7–12
916 students
Shrewsbury, MA
B+Overall gradeAll boys916 students12 students per teacher
#10 Largest Private Schools in Massachusetts
Malden Catholic High School
Independent Catholic school · Grades 9–12
863 students
Malden, MA
A+Overall grade863 students12 students per teacher
#11 Largest Private Schools in Massachusetts
Arlington Catholic High School/Saint Agnes School
Diocesan school · Grades Pre-K–12
851 students
Arlington, MA
A-Overall grade851 students10 students per teacher
#12 Largest Private Schools in Massachusetts
Austin Preparatory School
Independent Catholic school · Grades 6–12
806 students
Reading, MA
B+Overall grade806 students11 students per teacher
#13 Largest Private Schools in Massachusetts
Archbishop Williams High School
Independent Catholic school · Grades 7–12
725 students
Braintree, MA
A-Overall grade725 students12 students per teacher
#14 Largest Private Schools in Massachusetts
Lowell Catholic
Diocesan school · Grades Pre-K–12
705 students
Lowell, MA
B-Overall grade705 students11 students per teacher
#15 Largest Private Schools in Massachusetts
Whitinsville Christian School
Calvinist school · Grades Pre-K–12
625 students
Whitinsville, MA
A-Overall grade625 students8 students per teacher
#16 Largest Private Schools in Massachusetts
Catholic Memorial
Independent Catholic school · Grades 7–12
605 students
West Roxbury, MA
B+Overall gradeAll boys605 students13 students per teacher
#17 Largest Private Schools in Massachusetts
Bishop Stang High School
Diocesan school · Grades 9–12
558 students
North Dartmouth, MA
BOverall grade558 students14 students per teacher
#18 Largest Private Schools in Massachusetts
Tabor Academy
Independent school · Grades 9–12
538 students
Marion, MA
AOverall grade538 students7 students per teacher
#19 Largest Private Schools in Massachusetts
The Park School
Independent school · Grades Pre-K–8
533 students
Brookline, MA
B+Overall grade533 students8 students per teacher
#20 Largest Private Schools in Massachusetts
Worcester Academy
Independent school · Grades 6–12
532 students
Worcester, MA
AOverall grade532 students8 students per teacher
#21 Largest Private Schools in Massachusetts
The Rivers School
Independent school · Grades 6–12
525 students
Weston, MA
A+Overall grade525 students6 students per teacher
#22 Largest Private Schools in Massachusetts
Academy of Notre Dame
Diocesan school · Grades Pre-K–12
502 students
Tyngsboro, MA
A-Overall grade502 students11 students per teacher
#23 Largest Private Schools in Massachusetts
Beaver Country Day School
Independent school · Grades 6–12
500 students
Chestnut Hill, MA
AOverall grade500 students7 students per teacher
#24 Largest Private Schools in Massachusetts
Shady Hill School
Independent school · Grades Pre-K–8
496 students
Cambridge, MA
A-Overall grade496 students7 students per teacher
From official public records, updated October 2026.