#1 Largest Private Schools in Worcester County, MA
St. John's High School
Independent Catholic school · Grades 7–12
916 students
Shrewsbury, MA
B+Overall gradeAll boys916 students12 students per teacher
2026 lists
Largest Private Schools in Worcester County, MA
The private schools in Worcester County, MA with the most students. Top 50 of 52 schools.
#2 Largest Private Schools in Worcester County, MA
Whitinsville Christian School
Calvinist school · Grades Pre-K–12
625 students
Whitinsville, MA
A-Overall grade625 students8 students per teacher
#3 Largest Private Schools in Worcester County, MA
Worcester Academy
Independent school · Grades 6–12
532 students
Worcester, MA
AOverall grade532 students8 students per teacher
#4 Largest Private Schools in Worcester County, MA
Fay School
Independent school · Grades K–9
486 students
Southborough, MA
A+Overall grade486 students4 students per teacher
#5 Largest Private Schools in Worcester County, MA
Bancroft School
Independent school · Grades Pre-K–12
416 students
Worcester, MA
A+Overall grade416 students5 students per teacher
#6 Largest Private Schools in Worcester County, MA
Doctor Franklin Perkins School
Special education school · Grade 2
413 students
Lancaster, MA
B-Overall grade413 students13 students per teacher
#7 Largest Private Schools in Worcester County, MA
St. Paul Diocesan Jr/Sr High School
Parish school · Grades 7–12
406 students
Worcester, MA
A+Overall grade406 students12 students per teacher
#8 Largest Private Schools in Worcester County, MA
St. Mark's School
Episcopal school · Grades 9–12
377 students
Southborough, MA
A+Overall grade377 students4 students per teacher
#9 Largest Private Schools in Worcester County, MA
St. Bernadette Elementary School
Parish school · Grades Pre-K–8
303 students
Northborough, MA
A+Overall grade303 students6 students per teacher
#10 Largest Private Schools in Worcester County, MA
St. Peter Central Catholic Elementary School
Diocesan school · Grades Pre-K–8
302 students
Worcester, MA
AOverall grade302 students14 students per teacher
#11 Largest Private Schools in Worcester County, MA
The Winchendon School
Independent school · Grades 9–12
271 students
Winchendon, MA
BOverall grade271 students8 students per teacher
#12 Largest Private Schools in Worcester County, MA
South Lancaster Academy
Christian school (nondenominational) · Grades Pre-K–12
264 students
South Lancaster, MA
A-Overall grade264 students12 students per teacher
#13 Largest Private Schools in Worcester County, MA
Notre Dame Academy
Independent Catholic school · Grades 7–12
258 students
Worcester, MA
A+Overall gradeAll girls258 students8 students per teacher
#14 Largest Private Schools in Worcester County, MA
St. Leo School
Parish school · Grades Pre-K–8
230 students
Leominster, MA
BOverall grade230 students
#15 Largest Private Schools in Worcester County, MA
St. Bernard Elementary
Diocesan school · Grades Pre-K–8
222 students
Fitchburg, MA
A+Overall grade222 students8 students per teacher
#16 Largest Private Schools in Worcester County, MA
Eagle Hill School
Special education school · Grades 8–12
217 students
Hardwick, MA
AOverall grade217 students4 students per teacher
#17 Largest Private Schools in Worcester County, MA
St. Bernard's High School
Independent Catholic school · Grades 9–12
207 students
Fitchburg, MA
AOverall grade207 students13 students per teacher
#18 Largest Private Schools in Worcester County, MA
Our Lady of the Valley Regional School
Independent Catholic school · Grades Pre-K–8
194 students
Uxbridge, MA
BOverall grade194 students13 students per teacher
#19 Largest Private Schools in Worcester County, MA
Venerini Academy
Independent Catholic school · Grades Pre-K–8
187 students
Worcester, MA
A+Overall grade187 students10 students per teacher
#20 Largest Private Schools in Worcester County, MA
Bethany Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
172 students
Mendon, MA
BOverall grade172 students11 students per teacher
#21 Largest Private Schools in Worcester County, MA
All Saints Academy
Independent Catholic school · Grades Pre-K–8
165 students
Webster, MA
B+Overall grade165 students12 students per teacher
#22 Largest Private Schools in Worcester County, MA
St. Mary School
Diocesan school · Grades Pre-K–8
162 students
Shrewsbury, MA
BOverall grade162 students16 students per teacher
#23 Largest Private Schools in Worcester County, MA
St. Joseph School
Parish school · Grades Pre-K–8
161 students
Webster, MA
A-Overall grade161 students11 students per teacher
#24 Largest Private Schools in Worcester County, MA
Al-Hamra Academy
Islamic school · Grades Pre-K–8
151 students
Shrewsbury, MA
A+Overall grade151 students7 students per teacher
From official public records, updated October 2026.