#1 Best Private Middle 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
2026 lists
Best Private Middle Schools in Suffolk County, MA
Private schools in Suffolk County, MA with middle-school grades and the highest overall grades. Top 22 of 22 schools.
#2 Best Private Middle 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
#3 Best Private Middle 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
#4 Best Private Middle 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
#5 Best Private Middle 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
#6 Best Private Middle 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
#7 Best Private Middle 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
#8 Best Private Middle 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
#9 Best Private Middle 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
#10 Best Private Middle 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
#11 Best Private Middle 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
#12 Best Private Middle 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
#13 Best Private Middle 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
#14 Best Private Middle 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
#15 Best Private Middle 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
#16 Best Private Middle 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
#17 Best Private Middle 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
#18 Best Private Middle Schools in Suffolk County, MA
Sacred Heart Elementary
Parish school · Grades Pre-K–8
A Catholic school in Roslindale
Roslindale, MA
BOverall grade143 students13 students per teacher
#19 Best Private Middle Schools in Suffolk County, MA
St. John Paul II Academy, Neponset
Diocesan school · Grades Pre-K–8
One of 7 Catholic schools in Dorchester
Dorchester, MA
BOverall grade292 students13 students per teacher
#20 Best Private Middle Schools in Suffolk County, MA
Berea SDA Academy
Seventh-day Adventist school · Grades Pre-K–12
Serving families in Mattapan since at least 2011
Mattapan, MA
BOverall grade94 students13 students per teacher
#21 Best Private Middle Schools in Suffolk County, MA
St. John Paul Lower Mills
Diocesan school · Grades Pre-K–8
One of 7 Catholic schools in Dorchester
Dorchester, MA
B-Overall grade340 students14 students per teacher
#22 Best Private Middle Schools in Suffolk County, MA
St. John Paul II Catholic Academy
Diocesan school · Grades Pre-K–8
Growing: enrollment up 18% since 2013–14
Dorchester Center, MA
B-Overall grade277 students17 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.