#1 Largest Private Schools in Essex County, NJ
The Montclair Kimberley Academy
Independent school · Grades Pre-K–12
1,034 students
Montclair, NJ
A+Overall grade1,034 students6 students per teacher
2026 lists
Largest Private Schools in Essex County, NJ
The private schools in Essex County, NJ with the most students. Top 50 of 50 schools.
#2 Largest Private Schools in Essex County, NJ
Seton Hall Preparatory School
Diocesan school · Grades 9–12
981 students
West Orange, NJ
A+Overall gradeAll boys981 students13 students per teacher
#3 Largest Private Schools in Essex County, NJ
St. Benedict's Prep
Independent Catholic school · Grades K–12
965 students
Newark, NJ
B+Overall grade965 students13 students per teacher
#4 Largest Private Schools in Essex County, NJ
Joseph Kushner Hebrew Academy Rae Kushner Yeshiva
Jewish day school · Grades Pre-K–12
690 students
Livingston, NJ
AOverall grade690 students5 students per teacher
#5 Largest Private Schools in Essex County, NJ
Golda Och Academy
Jewish day school · Grades Pre-K–12
424 students
West Orange, NJ
A+Overall grade424 students6 students per teacher
#6 Largest Private Schools in Essex County, NJ
Abundant Life Academy
Pentecostal school · Grades Pre-K–12
367 students
Nutley, NJ
B+Overall grade367 students14 students per teacher
#7 Largest Private Schools in Essex County, NJ
The Pingry Lower School
Independent school · Grades K–5
324 students
Short Hills, NJ
AOverall grade324 students5 students per teacher
#8 Largest Private Schools in Essex County, NJ
Lacordaire Academy
Independent Catholic school · Grades Pre-K–12
255 students
Upper Montclair, NJ
A+Overall grade255 students8 students per teacher
#9 Largest Private Schools in Essex County, NJ
Mount Saint Dominic Academy
Independent Catholic school · Grades 9–12
254 students
Caldwell, NJ
A+Overall gradeAll girls254 students8 students per teacher
#10 Largest Private Schools in Essex County, NJ
St. Michael School
Parish school · Grades K–8
251 students
Newark, NJ
BOverall grade251 students18 students per teacher
#11 Largest Private Schools in Essex County, NJ
St. Cassian Elementary School
Diocesan school · Grades Pre-K–8
207 students
Upper Montclair, NJ
A+Overall grade207 students9 students per teacher
#12 Largest Private Schools in Essex County, NJ
Maarif School
Islamic school · Grades Pre-K–12
199 students
Bloomfield, NJ
AOverall grade199 students8 students per teacher
#13 Largest Private Schools in Essex County, NJ
Far Brook School
Independent school · Grades Pre-K–8
198 students
Short Hills, NJ
A+Overall grade198 students5 students per teacher
#14 Largest Private Schools in Essex County, NJ
Madrasatu Ahlis Sunnah
Islamic school · Grades Pre-K–12
198 students
East Orange, NJ
B+Overall grade198 students8 students per teacher
#15 Largest Private Schools in Essex County, NJ
St. Vincent Academy
Independent Catholic school · Grades 9–12
197 students
Newark, NJ
A+Overall gradeAll girls197 students9 students per teacher
#16 Largest Private Schools in Essex County, NJ
Our Lady of Sorrows School
Diocesan school · Grades Pre-K–8
184 students
South Orange, NJ
A+Overall grade184 students8 students per teacher
#17 Largest Private Schools in Essex County, NJ
St. Catherine of Siena School
Diocesan school · Grades Pre-K–8
180 students
Cedar Grove, NJ
A-Overall grade180 students13 students per teacher
#18 Largest Private Schools in Essex County, NJ
St. Joseph Elementary School
Parish school · Grades Pre-K–8
174 students
East Orange, NJ
B-Overall grade174 students16 students per teacher
#19 Largest Private Schools in Essex County, NJ
Aquinas Academy
Diocesan school · Grades K–8
165 students
Livingston, NJ
A+Overall grade165 students9 students per teacher
#20 Largest Private Schools in Essex County, NJ
Immaculate Conception High School
Independent Catholic school · Grades 9–12
164 students
Montclair, NJ
B+Overall grade164 students11 students per teacher
#21 Largest Private Schools in Essex County, NJ
St. Thomas the Apostle School
Diocesan school · Grades Pre-K–8
163 students
Bloomfield, NJ
A+Overall grade163 students8 students per teacher
#22 Largest Private Schools in Essex County, NJ
New Beginnings
Special education school · Grades Pre-K–12
160 students
Fairfield, NJ
BOverall grade160 students8 students per teacher
#23 Largest Private Schools in Essex County, NJ
St. Rose of Lima Academy
Diocesan school · Grades Pre-K–8
152 students
Short Hills, NJ
AOverall grade152 students12 students per teacher
#24 Largest Private Schools in Essex County, NJ
Our Lady of the Lake School
Diocesan school · Grades Pre-K–8
148 students
Verona, NJ
A+Overall grade148 students11 students per teacher
From official public records, updated October 2026.