#1 Best Private Schools in Suffolk County, MA
Commonwealth School
Independent school · Grades 9–12
Smaller classes than 85% of independent schools in Massachusetts
Boston, MA
A+Overall grade154 students4 students per teacher
2026 lists
Best Private Schools in Suffolk County, MA
Private schools in Suffolk County, MA with the highest overall grades. Top 33 of 33 schools.
#2 Best Private Schools in Suffolk County, MA
The Newman School
Independent school · Grades 7–12
100% of graduates go to four-year colleges
Boston, MA
A+Overall grade251 students5 students per teacher
#3 Best Private Schools in Suffolk County, MA
Boston Trinity Academy
Christian school (nondenominational) · Grades 6–12
93% of graduates go to four-year colleges
Boston, MA
A+Overall grade238 students7 students per teacher
#4 Best Private Schools in Suffolk County, MA
German International School Boston
Independent school · Grades Pre-K–12
100% of graduates go to four-year colleges
Boston, MA
A+Overall grade256 students4 students per teacher
#5 Best Private Schools in Suffolk County, MA
Learning Project Elementary School
Independent school · Grades K–6
The smallest classes of any independent school in Boston
Boston, MA
A+Overall grade118 students4 students per teacher
#6 Best Private Schools in Suffolk County, MA
Boston University Academy
Independent school · Grades 9–12
100% of graduates go to four-year colleges
Boston, MA
A+Overall grade233 students7 students per teacher
#7 Best Private Schools in Suffolk County, MA
St. John School
Diocesan school · Grades Pre-K–8
Smaller classes than 93% of Catholic schools in Massachusetts
Boston, MA
A+Overall grade121 students7 students per teacher
#8 Best Private Schools in Suffolk County, MA
The Newman School
Independent school · Grades 7–12
100% of graduates go to four-year colleges
Boston, MA
A+Overall grade244 students5 students per teacher
#9 Best Private Schools in Suffolk County, MA
St. John Paul II Catholic Academy Columbia Camp
Diocesan school · Grades Pre-K–8
Serving families in Dorchester since at least 2011
Dorchester, MA
A+Overall grade214 students11 students per teacher
#10 Best Private Schools in Suffolk County, MA
Epiphany School
Episcopal school · Grades 5–8
Smaller classes than 91% of Christian schools in Massachusetts
Dorchester Center, MA
A+Overall grade84 students6 students per teacher
#11 Best Private Schools in Suffolk County, MA
Park Street School
Christian school (nondenominational) · Grades Pre-K–6
Smaller classes than 61% of Christian schools in Massachusetts
Boston, MA
A+Overall grade162 students8 students per teacher
#12 Best Private Schools in Suffolk County, MA
St. Columbkille Partnership School
Independent Catholic school · Grades Pre-K–8
The only Catholic school in Brighton
Brighton, MA
A+Overall grade307 students12 students per teacher
#13 Best Private Schools in Suffolk County, MA
The Winsor School
Independent school · Grades 5–12
The only all-girls school in Boston
Boston, MA
A+Overall gradeAll girls475 students6 students per teacher
#14 Best Private Schools in Suffolk County, MA
Cathedral High School
Independent Catholic school · Grades 7–12
Smaller classes than 83% of Catholic schools in Massachusetts
Boston, MA
A+Overall grade326 students9 students per teacher
#15 Best Private Schools in Suffolk County, MA
The Advent School
Independent school · Grades Pre-K–6
Small classes: about 6 students per teacher
Boston, MA
AOverall grade161 students6 students per teacher
#16 Best Private Schools in Suffolk County, MA
Boston College High School
Independent Catholic school · Grades 7–12
The only all-boys school in Dorchester
Dorchester, MA
AOverall gradeAll boys1,439 students13 students per teacher
#17 Best Private Schools in Suffolk County, MA
Immaculate Conception
Parish school · Grades Pre-K–8
Growing: enrollment up 32% since 2011–12
Revere, MA
AOverall grade272 students12 students per teacher
#18 Best Private Schools in Suffolk County, MA
Mother Caroline Academy & Education Center
Independent Catholic school · Grades 3–8
The only all-girls school in Dorchester
Dorchester, MA
AOverall gradeAll girls69 students8 students per teacher
#19 Best Private Schools in Suffolk County, MA
Meridian Academy
Independent school · Grades 6–12
The smallest classes of any independent school in Jamaica Plain
Jamaica Plain, MA
AOverall grade88 students6 students per teacher
#20 Best Private Schools in Suffolk County, MA
Kingsley Montessori School
Montessori school · Grades Pre-K–6
The largest of 31 Montessori schools in Massachusetts
Boston, MA
AOverall grade184 students5 students per teacher
#21 Best Private Schools in Suffolk County, MA
Catholic Memorial
Independent Catholic school · Grades 7–12
The only all-boys school in West Roxbury
West Roxbury, MA
B+Overall gradeAll boys605 students13 students per teacher
#22 Best Private Schools in Suffolk County, MA
British International School of Boston
Independent school · Grades Pre-K–12
The largest independent school in Boston
Boston, MA
B+Overall grade481 students9 students per teacher
#23 Best Private Schools in Suffolk County, MA
Cristo Rey Boston High School
Diocesan school · Grades 9–12
92% of graduates go to four-year colleges
Dorchester, MA
B+Overall grade230 students15 students per teacher
#24 Best Private Schools in Suffolk County, MA
East Boston Central Catholic School
Parish school · Grades Pre-K–8
Serving families in East Boston since at least 2011
East Boston, MA
B+Overall grade161 students15 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.