#1 Best Private Schools in Boston, 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 Boston, MA
Private schools in Boston, MA with the highest overall grades. Top 14 of 14 schools.
#2 Best Private 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
#3 Best Private 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
#4 Best Private 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
#5 Best Private Schools in Boston, 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 Boston, 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 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
#8 Best Private 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
#9 Best Private Schools in Boston, 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
#10 Best Private 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
#11 Best Private 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
#12 Best Private Schools in Boston, 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
#13 Best Private Schools in Boston, 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
#14 Best Private 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.