#1 Best Private High 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 High Schools in Suffolk County, MA
Private high schools in Suffolk County, MA with the highest overall grades. Top 12 of 12 schools.
#2 Best Private High 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 High 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 High 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 High 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
#6 Best Private High 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
#7 Best Private High 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
#8 Best Private High 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
#9 Best Private High 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
#10 Best Private High 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
#11 Best Private High 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
#12 Best Private High 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
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.