#1 Most Diverse Private Schools in Suffolk County, MA
Commonwealth School
Independent school · Grades 9–12
Largest group: 38% of students
Boston, MA
A+Overall grade154 students4 students per teacher
2026 lists
Most Diverse Private Schools in Suffolk County, MA
Private schools in Suffolk County, MA with the most varied mix of students. Top 37 of 37 schools.
#2 Most Diverse Private Schools in Suffolk County, MA
Boston Trinity Academy
Christian school (nondenominational) · Grades 6–12
Largest group: 41% of students
Boston, MA
A+Overall grade238 students7 students per teacher
#3 Most Diverse Private Schools in Suffolk County, MA
St. Columbkille Partnership School
Independent Catholic school · Grades Pre-K–8
Largest group: 43% of students
Brighton, MA
A+Overall grade307 students12 students per teacher
#4 Most Diverse Private Schools in Suffolk County, MA
St. John Paul II Catholic Academy Columbia Camp
Diocesan school · Grades Pre-K–8
Largest group: 43% of students
Dorchester, MA
A+Overall grade214 students11 students per teacher
#5 Most Diverse Private Schools in Suffolk County, MA
Kennedy Day School
Special education school · Ungraded
Largest group: 45% of students
Brighton, MA
A+Overall grade65 students3 students per teacher
#6 Most Diverse Private Schools in Suffolk County, MA
Cristo Rey Boston High School
Diocesan school · Grades 9–12
Largest group: 47% of students
Dorchester, MA
B+Overall grade230 students15 students per teacher
#7 Most Diverse Private Schools in Suffolk County, MA
Manville School
Special education school · Grades 1–10
Largest group: 49% of students
Roxbury Crossing, MA
A+Overall grade93 students3 students per teacher
#8 Most Diverse Private Schools in Suffolk County, MA
Croft School
Independent school · Grades Pre-K–5
Largest group: 50% of students
Jamaica Plain, MA
B-Overall grade320 students9 students per teacher
#9 Most Diverse Private Schools in Suffolk County, MA
Boston University Academy
Independent school · Grades 9–12
Largest group: 51% of students
Boston, MA
A+Overall grade233 students7 students per teacher
#10 Most Diverse Private Schools in Suffolk County, MA
The Winsor School
Independent school · Grades 5–12
Largest group: 52% of students
Boston, MA
A+Overall gradeAll girls475 students6 students per teacher
#11 Most Diverse Private Schools in Suffolk County, MA
Nativity Preparatory School
Independent Catholic school · Grades 5–8
Largest group: 54% of students
Jamaica Plain, MA
A+Overall gradeAll boys54 students7 students per teacher
#12 Most Diverse Private Schools in Suffolk County, MA
Immaculate Conception
Parish school · Grades Pre-K–8
Largest group: 55% of students
Revere, MA
AOverall grade272 students12 students per teacher
#13 Most Diverse Private Schools in Suffolk County, MA
The Newman School
Independent school · Grades 7–12
Largest group: 57% of students
Boston, MA
A+Overall grade251 students5 students per teacher
#14 Most Diverse Private Schools in Suffolk County, MA
Kingsley Montessori School
Montessori school · Grades Pre-K–6
Largest group: 57% of students
Boston, MA
AOverall grade184 students5 students per teacher
#15 Most Diverse Private Schools in Suffolk County, MA
Sacred Heart Elementary
Parish school · Grades Pre-K–8
Largest group: 59% of students
Roslindale, MA
BOverall grade143 students13 students per teacher
#16 Most Diverse Private Schools in Suffolk County, MA
Learning Project Elementary School
Independent school · Grades K–6
Largest group: 63% of students
Boston, MA
A+Overall grade118 students4 students per teacher
#17 Most Diverse Private Schools in Suffolk County, MA
Park Street School
Christian school (nondenominational) · Grades Pre-K–6
Largest group: 64% of students
Boston, MA
A+Overall grade162 students8 students per teacher
#18 Most Diverse Private Schools in Suffolk County, MA
East Boston Central Catholic School
Parish school · Grades Pre-K–8
Largest group: 65% of students
East Boston, MA
B+Overall grade161 students15 students per teacher
#19 Most Diverse Private Schools in Suffolk County, MA
Meridian Academy
Independent school · Grades 6–12
Largest group: 65% of students
Jamaica Plain, MA
AOverall grade88 students6 students per teacher
#20 Most Diverse Private Schools in Suffolk County, MA
British International School of Boston
Independent school · Grades Pre-K–12
Largest group: 67% of students
Boston, MA
B+Overall grade481 students9 students per teacher
#21 Most Diverse Private Schools in Suffolk County, MA
Boston College High School
Independent Catholic school · Grades 7–12
Largest group: 68% of students
Dorchester, MA
AOverall gradeAll boys1,439 students13 students per teacher
#22 Most Diverse Private Schools in Suffolk County, MA
The Newman School
Independent school · Grades 7–12
Largest group: 68% of students
Boston, MA
A+Overall grade244 students5 students per teacher
#23 Most Diverse Private Schools in Suffolk County, MA
St. John Paul II Academy, Neponset
Diocesan school · Grades Pre-K–8
Largest group: 70% of students
Dorchester, MA
BOverall grade292 students13 students per teacher
#24 Most Diverse Private Schools in Suffolk County, MA
The Advent School
Independent school · Grades Pre-K–6
Largest group: 70% of students
Boston, MA
AOverall grade161 students6 students per teacher
From official public records, updated October 2026.