#1 Largest Private Schools in Somerset County, NJ
Immaculata High School
Parish school · Grades 9–12
692 students
Somerville, NJ
BOverall grade692 students13 students per teacher
2026 lists
Largest Private Schools in Somerset County, NJ
The private schools in Somerset County, NJ with the most students. Top 35 of 35 schools.
#2 Largest Private Schools in Somerset County, NJ
Rutgers Preparatory School
Independent school · Grades Pre-K–12
673 students
Somerset, NJ
A+Overall grade673 students8 students per teacher
#3 Largest Private Schools in Somerset County, NJ
Immaculate Conception School
Parish school · Grades Pre-K–8
362 students
Somerville, NJ
BOverall grade362 students13 students per teacher
#4 Largest Private Schools in Somerset County, NJ
Cedar Hill Prep School
Independent school · Grades Pre-K–8
229 students
Somerset, NJ
A+Overall grade229 students5 students per teacher
#5 Largest Private Schools in Somerset County, NJ
St. Matthias Elementary School
Diocesan school · Grades Pre-K–8
226 students
Somerset, NJ
A+Overall grade226 students11 students per teacher
#6 Largest Private Schools in Somerset County, NJ
Far Hills Country Day School
Independent school · Grades Pre-K–8
196 students
Far Hills, NJ
A+Overall grade196 students5 students per teacher
#7 Largest Private Schools in Somerset County, NJ
School of Saint Elizabeth
Diocesan school · Grades Pre-K–8
148 students
Bernardsville, NJ
BOverall grade148 students15 students per teacher
#8 Largest Private Schools in Somerset County, NJ
The Willow School
Independent school · Grades Pre-K–8
111 students
Gladstone, NJ
A+Overall grade111 students5 students per teacher
#9 Largest Private Schools in Somerset County, NJ
Mendham Country Day School
Independent school · Grades Pre-K–8
105 students
Basking Ridge, NJ
B+Overall grade105 students8 students per teacher
#10 Largest Private Schools in Somerset County, NJ
The Center School
Special education school · Grades 3–12
96 students
Somerset, NJ
AOverall grade96 students3 students per teacher
#11 Largest Private Schools in Somerset County, NJ
The Midland School
Special education school · Ungraded
95 students
North Branch, NJ
A-Overall grade95 students6 students per teacher
#12 Largest Private Schools in Somerset County, NJ
Princeton Montessori School
Montessori school · Grades Pre-K–8
93 students
Princeton, NJ
B+Overall grade93 students12 students per teacher
#13 Largest Private Schools in Somerset County, NJ
Waldorf School of Princeton
Independent school · Grades Pre-K–8
93 students
Princeton, NJ
AOverall grade93 students7 students per teacher
#14 Largest Private Schools in Somerset County, NJ
Bonnie Brae School
Special education school · Grades 7–12
82 students
Liberty Corner, NJ
A+Overall gradeAll boys82 students4 students per teacher
#15 Largest Private Schools in Somerset County, NJ
Yeshiva Tiferes Boruch/Springfield Yeshiva
Jewish day school · Grades 9–12
82 students
North Plainfield, NJ
B+Overall gradeAll boys82 students9 students per teacher
#16 Largest Private Schools in Somerset County, NJ
New Road School of Somerset
Special education school · Grades 7–12
72 students
Somerset, NJ
B+Overall grade72 students7 students per teacher
#17 Largest Private Schools in Somerset County, NJ
Yinghua International School
Independent school · Grades K–8
70 students
Kingston, NJ
A+Overall grade70 students3 students per teacher
#18 Largest Private Schools in Somerset County, NJ
St. Ann Classical Academy
Parish school · Grades Pre-K–8
69 students
Raritan, NJ
A+Overall grade69 students7 students per teacher
#19 Largest Private Schools in Somerset County, NJ
Montgomery Montessori School
Montessori school · Kindergarten only
57 students
Skillman, NJ
B+Overall grade57 students5 students per teacher
#20 Largest Private Schools in Somerset County, NJ
Montgomery Academy
Special education school · Grades 1–12
54 students
Basking Ridge, NJ
A+Overall grade54 students3 students per teacher
#21 Largest Private Schools in Somerset County, NJ
The Albrook School
Montessori school · Grades Pre-K–5
53 students
Basking Ridge, NJ
A+Overall grade53 students2 students per teacher
#22 Largest Private Schools in Somerset County, NJ
Cherry Blossom Montessori School
Montessori school · Grades Pre-K–4
34 students
Flagtown, NJ
A-Overall grade34 students4 students per teacher
#23 Largest Private Schools in Somerset County, NJ
Raritan Valley Montessori Academy
Montessori school · Grades Pre-K–3
32 students
Bridgewater, NJ
AOverall grade32 students3 students per teacher
#24 Largest Private Schools in Somerset County, NJ
Somerset Hills Montessori School
Montessori school · Grades Pre-K–K
30 students
Basking Ridge, NJ
AOverall grade30 students2 students per teacher
From official public records, updated October 2026.