#49 Largest Private Schools in Massachusetts
St. Michaels Academy
Diocesan school · Grades Pre-K–8
378 students
Springfield, MA
B+Overall grade378 students16 students per teacher
2026 lists
Largest Private Schools in Massachusetts
The private schools in Massachusetts with the most students. Top 50 of 431 schools.
#50 Largest Private Schools in Massachusetts
St. Mark's School
Episcopal school · Grades 9–12
377 students
Southborough, MA
A+Overall grade377 students4 students per teacher
From official public records, updated October 2026.