#1 Largest Private Schools in Milton, MA
Milton Academy
Independent school · Grades K–12
1,030 students
Milton, MA
A+Overall grade1,030 students5 students per teacher
2026 lists
Largest Private Schools in Milton, MA
The private schools in Milton, MA with the most students. Top 6 of 6 schools.
#2 Largest Private Schools in Milton, MA
Fontbonne Academy
Independent Catholic school · Grades 7–12
317 students
Milton, MA
A+Overall gradeAll girls317 students9 students per teacher
#3 Largest Private Schools in Milton, MA
St. Agatha School
Parish school · Grades Pre-K–8
253 students
Milton, MA
B+Overall grade253 students13 students per teacher
#4 Largest Private Schools in Milton, MA
St. Mary of the Hills School
Diocesan school · Grades Pre-K–8
175 students
Milton, MA
B+Overall grade175 students13 students per teacher
#5 Largest Private Schools in Milton, MA
Delphi Academy
Independent school · Grades Pre-K–8
118 students
Milton, MA
A+Overall grade118 students6 students per teacher
#6 Largest Private Schools in Milton, MA
Thacher Montessori School
Montessori school · Grades Pre-K–8
67 students
Milton, MA
A-Overall grade67 students5 students per teacher
From official public records, updated October 2026.