#49 Fastest-Growing Private Schools in Massachusetts
Atrium School
Independent school · Grades Pre-K–8
Enrollment up 28% in about a decade
Watertown, MA
A+Overall grade110 students5 students per teacher
2026 lists
Fastest-Growing Private Schools in Massachusetts
Private schools in Massachusetts whose enrollment has grown the most over the past decade. Top 50 of 85 schools.
#50 Fastest-Growing Private Schools in Massachusetts
Our Sisters' School
Independent school · Grades 5–8
Enrollment up 28% in about a decade
New Bedford, MA
AOverall gradeAll girls69 students7 students per teacher
From official public records, updated October 2026.