#1 Best Independent Schools in Middlesex County, MA
Belmont Day School
Independent school · Grade 1
The only independent school in Belmont
Belmont, MA
A+Overall grade334 students4 students per teacher
2026 lists
Best Independent Schools in Middlesex County, MA
The highest-graded schools of this kind in Middlesex County, MA. Top 18 of 18 schools.
#2 Best Independent Schools in Middlesex County, MA
Meadowbrook School of Weston
Independent school · Grades Pre-K–8
Smaller classes than 77% of independent schools in Massachusetts
Weston, MA
A+Overall grade295 students5 students per teacher
#3 Best Independent Schools in Middlesex County, MA
Chapel Hill Chauncy Hall School
Independent school · Grades 8–12
The only independent school in Waltham
Waltham, MA
A+Overall grade198 students5 students per teacher
#4 Best Independent Schools in Middlesex County, MA
Lesley Ellis School
Independent school · Grades Pre-K–8
The only independent school in Arlington
Arlington, MA
A+Overall grade155 students4 students per teacher
#5 Best Independent Schools in Middlesex County, MA
Hillside School
Independent school · Grades 4–9
The only independent school in Marlborough
Marlborough, MA
A+Overall gradeAll boys140 students5 students per teacher
#6 Best Independent Schools in Middlesex County, MA
Brimmer & May School
Independent school · Grades Pre-K–12
98% of graduates go to four-year colleges
Chestnut Hill, MA
A+Overall grade394 students6 students per teacher
#7 Best Independent Schools in Middlesex County, MA
Acera School
Independent school · Grades K–12
The only independent school in Winchester
Winchester, MA
A+Overall grade122 students5 students per teacher
#8 Best Independent Schools in Middlesex County, MA
The Rivers School
Independent school · Grades 6–12
The largest independent school in Weston
Weston, MA
A+Overall grade525 students6 students per teacher
#9 Best Independent Schools in Middlesex County, MA
Atrium School
Independent school · Grades Pre-K–8
Smaller classes than 64% of independent schools in Massachusetts
Watertown, MA
A+Overall grade110 students5 students per teacher
#10 Best Independent Schools in Middlesex County, MA
The Cambridge School of Weston
Independent school · Grades 9–12
100% of graduates go to four-year colleges
Weston, MA
A+Overall grade307 students7 students per teacher
#11 Best Independent Schools in Middlesex County, MA
Nashoba Brooks School
Independent school · Grades Pre-K–8
Smaller classes than 64% of independent schools in Massachusetts
Concord, MA
AOverall grade192 students5 students per teacher
#12 Best Independent Schools in Middlesex County, MA
Star Academy for the Gifted and Talented
Independent school · Grades Pre-K–11
Smaller classes than 87% of independent schools in Massachusetts
Watertown, MA
A-Overall grade217 students4 students per teacher
#13 Best Independent Schools in Middlesex County, MA
Shady Hill School
Independent school · Grades Pre-K–8
Small classes: about 7 students per teacher
Cambridge, MA
A-Overall grade496 students7 students per teacher
#14 Best Independent Schools in Middlesex County, MA
Lawrence Academy
Independent school · Grades 9–12
The only independent school in Groton
Groton, MA
A-Overall grade415 students7 students per teacher
#15 Best Independent Schools in Middlesex County, MA
Fayerweather Street School
Independent school · Grades Pre-K–8
Small classes: about 7 students per teacher
Cambridge, MA
B+Overall grade180 students7 students per teacher
#16 Best Independent Schools in Middlesex County, MA
Waldorf School of Lexington
Independent school · Grades Pre-K–8
The only independent school in Lexington
Lexington, MA
B+Overall grade154 students7 students per teacher
#17 Best Independent Schools in Middlesex County, MA
New England Innovation Academy
Independent school · Grades 6–12
Small classes: about 6 students per teacher
Marlborogh, MA
BOverall grade107 students6 students per teacher
#18 Best Independent Schools in Middlesex County, MA
The Fenn School
Independent school · Grades 4–9
The only all-boys school in Concord
Concord, MA
BOverall gradeAll boys310 students7 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.