#1 Largest Private Schools in Hampshire County, MA
The Williston Northampton School
Independent school · Grades 7–12
482 students
Easthampton, MA
B+Overall grade482 students8 students per teacher
2026 lists
Largest Private Schools in Hampshire County, MA
The private schools in Hampshire County, MA with the most students. Top 10 of 10 schools.
#2 Largest Private Schools in Hampshire County, MA
The Hartsbrook School
Independent school · Grades Pre-K–12
259 students
Hadley, MA
A+Overall grade259 students5 students per teacher
#3 Largest Private Schools in Hampshire County, MA
The Macduffie School
Independent school · Grades 6–12
203 students
Granby, MA
AOverall grade203 students6 students per teacher
#4 Largest Private Schools in Hampshire County, MA
Campus School of Smith College
Independent school · Grades K–6
148 students
Northampton, MA
BOverall grade148 students8 students per teacher
#5 Largest Private Schools in Hampshire County, MA
The Common School
Alternative school · Grades Pre-K–6
71 students
Amherst, MA
A+Overall grade71 students5 students per teacher
#6 Largest Private Schools in Hampshire County, MA
Lander Grinspoon Academy - Solomon Schechter
Jewish day school · Grades K–6
70 students
Northampton, MA
AOverall grade70 students5 students per teacher
#7 Largest Private Schools in Hampshire County, MA
New England Adolescent Research Institute
Special education school · Grades 4–12
47 students
Easthampton, MA
AOverall grade47 students3 students per teacher
#8 Largest Private Schools in Hampshire County, MA
The Montessori School of Northampton
Montessori school · Grades Pre-K–8
37 students
Northampton, MA
B+Overall grade37 students6 students per teacher
#9 Largest Private Schools in Hampshire County, MA
Cutchins Program
Special education school · Grades 3–12
28 students
Northampton, MA
A-Overall grade28 students4 students per teacher
#10 Largest Private Schools in Hampshire County, MA
Amherst Montessori School
Montessori school · Grades Pre-K–4
23 students
Amherst, MA
AOverall grade23 students3 students per teacher
From official public records, updated October 2026.