#1 Best Private Middle Schools in Boston, 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 Boston, MA
Private schools in Boston, MA with middle-school grades and the highest overall grades. Top 8 of 8 schools.
#2 Best Private Middle Schools in Boston, 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 Boston, 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 Boston, 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 Boston, 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 Boston, 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
#7 Best Private Middle Schools in Boston, 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
#8 Best Private Middle Schools in Boston, 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
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.