#1 Fastest-Growing Private Schools in Essex County, NJ
Lacordaire Academy
Independent Catholic school · Grades Pre-K–12
Enrollment up 99% in about a decade
Upper Montclair, NJ
A+Overall grade255 students8 students per teacher
2026 lists
Fastest-Growing Private Schools in Essex County, NJ
Private schools in Essex County, NJ whose enrollment has grown the most over the past decade. Top 9 of 9 schools.
#2 Fastest-Growing Private Schools in Essex County, NJ
St. Benedict's Prep
Independent Catholic school · Grades K–12
Enrollment up 72% in about a decade
Newark, NJ
B+Overall grade965 students13 students per teacher
#3 Fastest-Growing Private Schools in Essex County, NJ
Essex Valley School
Special education school · Grades 6–12
Enrollment up 51% in about a decade
West Caldwell, NJ
A+Overall grade103 students4 students per teacher
#4 Fastest-Growing Private Schools in Essex County, NJ
Madrasatu Ahlis Sunnah
Islamic school · Grades Pre-K–12
Enrollment up 49% in about a decade
East Orange, NJ
B+Overall grade198 students8 students per teacher
#5 Fastest-Growing Private Schools in Essex County, NJ
The Pingry Lower School
Independent school · Grades K–5
Enrollment up 27% in about a decade
Short Hills, NJ
AOverall grade324 students5 students per teacher
#6 Fastest-Growing Private Schools in Essex County, NJ
The Winston School
Special education school · Grades 2–8
Enrollment up 27% in about a decade
Short Hills, NJ
AOverall grade89 students3 students per teacher
#7 Fastest-Growing Private Schools in Essex County, NJ
Abundant Life Academy
Pentecostal school · Grades Pre-K–12
Enrollment up 18% in about a decade
Nutley, NJ
B+Overall grade367 students14 students per teacher
#8 Fastest-Growing Private Schools in Essex County, NJ
St. Cassian Elementary School
Diocesan school · Grades Pre-K–8
Enrollment up 16% in about a decade
Upper Montclair, NJ
A+Overall grade207 students9 students per teacher
#9 Fastest-Growing Private Schools in Essex County, NJ
Aquinas Academy
Diocesan school · Grades K–8
Enrollment up 10% in about a decade
Livingston, NJ
A+Overall grade165 students9 students per teacher
From official public records, updated October 2026.