#1 Largest Private Schools in Erie County, NY
St. Josephs Collegiate Institute
Independent Catholic school · Grades 9–12
647 students
Buffalo, NY
B+Overall gradeAll boys647 students14 students per teacher
2026 lists
Largest Private Schools in Erie County, NY
The private schools in Erie County, NY with the most students. Top 50 of 50 schools.
#2 Largest Private Schools in Erie County, NY
Nichols School
Independent school · Grades 5–12
582 students
Buffalo, NY
BOverall grade582 students8 students per teacher
#3 Largest Private Schools in Erie County, NY
Stanley G Falk School
Special education school · Grades K–12
554 students
Buffalo, NY
BOverall grade554 students5 students per teacher
#4 Largest Private Schools in Erie County, NY
St. Francis High School
Independent Catholic school · Grades 9–12
416 students
Hamburg, NY
BOverall gradeAll boys416 students15 students per teacher
#5 Largest Private Schools in Erie County, NY
St. Marys High School
Independent Catholic school · Grades 9–12
406 students
Lancaster, NY
B+Overall grade406 students13 students per teacher
#6 Largest Private Schools in Erie County, NY
Notre Dame Academy
Diocesan school · Grades Pre-K–8
376 students
Buffalo, NY
BOverall grade376 students14 students per teacher
#7 Largest Private Schools in Erie County, NY
St. Mark School
Diocesan school · Grades Pre-K–8
362 students
Buffalo, NY
AOverall grade362 students11 students per teacher
#8 Largest Private Schools in Erie County, NY
St. Benedict School
Parish school · Grades Pre-K–8
325 students
Amherst, NY
B+Overall grade325 students13 students per teacher
#9 Largest Private Schools in Erie County, NY
Queen of Heaven School
Diocesan school · Grades Pre-K–8
310 students
West Seneca, NY
BOverall grade310 students11 students per teacher
#10 Largest Private Schools in Erie County, NY
Bishop Timon-St. Jude High School
Independent Catholic school · Grades 9–12
279 students
Buffalo, NY
AOverall gradeAll boys279 students11 students per teacher
#11 Largest Private Schools in Erie County, NY
Darul Uloom Al Madania
Islamic school · Grades Pre-K–11
277 students
Buffalo, NY
B+Overall grade277 students11 students per teacher
#12 Largest Private Schools in Erie County, NY
The Park School of Buffalo
Alternative school · Grades Pre-K–12
236 students
Snyder, NY
A-Overall grade236 students5 students per teacher
#13 Largest Private Schools in Erie County, NY
St. Christopher Elementary School
Diocesan school · Grades Pre-K–8
223 students
Tonawanda, NY
AOverall grade223 students10 students per teacher
#14 Largest Private Schools in Erie County, NY
Christian Central Academy
Christian school (nondenominational) · Grades Pre-K–12
220 students
Williamsville, NY
AOverall grade220 students8 students per teacher
#15 Largest Private Schools in Erie County, NY
Mount St. Mary Academy
Independent Catholic school · Grades 9–12
216 students
Buffalo, NY
A+Overall gradeAll girls216 students8 students per teacher
#16 Largest Private Schools in Erie County, NY
St. Marys Elementary School
Diocesan school · Grades Pre-K–8
206 students
Lancaster, NY
A-Overall grade206 students10 students per teacher
#17 Largest Private Schools in Erie County, NY
Beyond Learning Center
Special education school · Pre-K only
202 students
Depew, NY
A+Overall grade202 students6 students per teacher
#18 Largest Private Schools in Erie County, NY
Baker Hall School
Special education school · Grades Pre-K–12
193 students
Lackawanna, NY
B-Overall grade193 students5 students per teacher
#19 Largest Private Schools in Erie County, NY
Cardinal O'Hara High School
Independent Catholic school · Grades 9–12
181 students
Tonawanda, NY
A+Overall grade181 students9 students per teacher
#20 Largest Private Schools in Erie County, NY
Mount Mercy Academy
Independent Catholic school · Grades 9–12
180 students
Buffalo, NY
A+Overall gradeAll girls180 students8 students per teacher
#21 Largest Private Schools in Erie County, NY
Catholic Academy West Buffalo
Diocesan school · Grades Pre-K–8
170 students
Buffalo, NY
A+Overall grade170 students11 students per teacher
#22 Largest Private Schools in Erie County, NY
Nativity of Our Lord School
Independent Catholic school · Grades Pre-K–8
170 students
Orchard Park, NY
BOverall grade170 students11 students per teacher
#23 Largest Private Schools in Erie County, NY
Immaculate Conception School
Independent Catholic school · Grades K–8
164 students
East Aurora, NY
B+Overall grade164 students12 students per teacher
#24 Largest Private Schools in Erie County, NY
St. Marys School
Diocesan school · Grades Pre-K–8
163 students
East Amherst, NY
AOverall grade163 students9 students per teacher
From official public records, updated October 2026.