#1 Best Private Middle Schools in Middlesex County, MA
St. Michael School
Diocesan school · Grades Pre-K–8
Smaller classes than 99% of Catholic schools in Massachusetts
Lowell, MA
A+Overall grade148 students4 students per teacher
2026 lists
Best Private Middle Schools in Middlesex County, MA
Private schools in Middlesex County, MA with middle-school grades and the highest overall grades. Top 50 of 50 schools.
#2 Best Private Middle Schools in Middlesex County, MA
Wellan Montessori School
Montessori school · Grades Pre-K–8
The only Montessori school in Newton
Newton, MA
A+Overall grade167 students2 students per teacher
#3 Best Private Middle 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
#4 Best Private Middle 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 Private Middle Schools in Middlesex County, MA
Lexington Christian Academy
Christian school (nondenominational) · Grades 6–12
The only Christian school in Lexington
Lexington, MA
A+Overall grade290 students9 students per teacher
#6 Best Private Middle 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
#7 Best Private Middle Schools in Middlesex County, MA
Newton Country Day School
Independent Catholic school · Grades 5–12
The only all-girls school in Newton
Newton, MA
A+Overall gradeAll girls374 students5 students per teacher
#8 Best Private Middle 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
#9 Best Private Middle Schools in Middlesex County, MA
Cambridge Friends School
Quaker (Friends) school · Grades Pre-K–8
Smaller classes than 70% of Christian schools in Massachusetts
Cambridge, MA
A+Overall grade122 students7 students per teacher
#10 Best Private Middle Schools in Middlesex County, MA
St. Patrick Elementary School
Parish school · Grades Pre-K–8
Smaller classes than 95% of Catholic schools in Massachusetts
Stoneham, MA
A+Overall grade208 students7 students per teacher
#11 Best Private Middle Schools in Middlesex County, MA
St. Joseph Elementary School
Parish school · Grades Pre-K–8
Smaller classes than 68% of Catholic schools in Massachusetts
Medford, MA
A+Overall grade147 students10 students per teacher
#12 Best Private Middle Schools in Middlesex County, MA
St. Patrick School and Educational Center
Independent Catholic school · Grades K–8
Smaller classes than 80% of Catholic schools in Massachusetts
Lowell, MA
A+Overall grade84 students8 students per teacher
#13 Best Private Middle Schools in Middlesex County, MA
Our Ladys Academy
Parish school · Grades Pre-K–8
The only Catholic school in Waltham
Waltham, MA
A+Overall grade328 students8 students per teacher
#14 Best Private Middle Schools in Middlesex County, MA
Cheverus Catholic School
Parish school · Grades Pre-K–8
Serving families in Malden since at least 2011
Malden, MA
A+Overall grade289 students12 students per teacher
#15 Best Private Middle Schools in Middlesex County, MA
St. Charles School
Parish school · Grades Pre-K–8
Smaller classes than 68% of Catholic schools in Massachusetts
Woburn, MA
A+Overall grade151 students10 students per teacher
#16 Best Private Middle Schools in Middlesex County, MA
St. Peter School
Parish school · Grades Pre-K–8
Smaller classes than 73% of Catholic schools in Massachusetts
Cambridge, MA
A+Overall grade166 students10 students per teacher
#17 Best Private Middle 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
#18 Best Private Middle 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
#19 Best Private Middle Schools in Middlesex County, MA
Riverbend School
Montessori school · Grades Pre-K–8
The only Montessori school in Natick
Natick, MA
A+Overall grade126 students3 students per teacher
#20 Best Private Middle Schools in Middlesex County, MA
St. Agnes School
Diocesan school · Grades Pre-K–8
Smaller classes than 64% of Catholic schools in Massachusetts
Arlington, MA
A+Overall grade291 students10 students per teacher
#21 Best Private Middle 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
#22 Best Private Middle Schools in Middlesex County, MA
St. Bridget School
Diocesan school · Grades Pre-K–8
The only Catholic school in Framingham
Framingham, MA
A+Overall grade228 students10 students per teacher
#23 Best Private Middle Schools in Middlesex County, MA
The Imago School Association
Christian school (nondenominational) · Grades Pre-K–8
Smaller classes than 76% of Christian schools in Massachusetts
Maynard, MA
A+Overall grade91 students7 students per teacher
#24 Best Private Middle Schools in Middlesex County, MA
Abundant Life Christian School
Christian school (nondenominational) · Grades Pre-K–8
The only Christian school in Wilmington
Wilmington, MA
A+Overall grade111 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.