St. Joseph School Photo - The St. Joseph School faculty, led by Principal, Lisa Gillespie, is well educated, is constantly keeping up with the latest educational techniques and loves the students...always wanting what is best for them!

Best Mendham Private Schools (2026)

For the 2026 school year, there are 3 private schools serving 313 students in Mendham, NJ (there are 3 public schools, serving 1,532 public students). 17% of all K-12 students in Mendham, NJ are educated in private schools (compared to the NJ state average of 14%).
The average acceptance rate is 90%, which is higher than the New Jersey private school average acceptance rate of 78%.
33% of private schools in Mendham, NJ are religiously affiliated (most commonly Catholic).

Private Schools in Mendham, NJ (2026)

School
Location
Quick Facts
The Cottage School
Alternative School
(1)
9E Main Street
Mendham, NJ 07945
(908) 719-9610
Gr: NS-8 | 20 students Extracurrculars: 3
St. Joseph School
St. Joseph School Photo - The St. Joseph School faculty, led by Principal, Lisa Gillespie, is well educated, is constantly keeping up with the latest educational techniques and loves the students...always wanting what is best for them!
(Catholic)
(2)
8 W Main St
Mendham, NJ 07945
(973) 543-7474
Gr: NS-8 | 156 students
Westmont Montessori School
Westmont Montessori School Photo
Daycare / Preschool
(2)
577 State Route 24
Mendham, NJ 07945
(908) 879-6355
Gr: PK-K | 137 students Avg. class size: 16 students Extracurrculars: 1 Tuition & acceptance rate listed
[+] Show Closed Private Schools in Mendham, New Jersey

Mendham, New Jersey Private Schools (Closed)

School
Location
Quick Facts
80 W Main St
Mendham, NJ 07945
(973) 543-5656
Gr: 9-12 | 66 students

Overview

This Town (Mendham)
This State (NJ)
# Schools
3 Schools

Student Body:

# Students
313 Students
217,877 Students
% Average Students of Color
11%
40%

Academics and Faculty:

# Teachers
36 Teachers
20,239 Teachers
Average Student-Teacher Ratio
9:1
11:1
% Average Faculty w/Advanced Degree
40%
54%
Average Class Size
16 students
14 students
Average Number of AP Courses
10 courses
15 courses

Tuition and Acceptance Rate:

Average Acceptance Rate
90%
78%

Students by Ethnicity:

0.52
0.63
# American Indian Students
n/a
942 Students
% American Indian Students
n/a
1%
# Asian Students
2 Students
11,318 Students
% Asian Students
1%
5%
# Hispanic Students
2 Students
15,575 Students
% Hispanic Students
1%
7%
# Black Students
1 Student
14,114 Students
% Black Students
n/a
7%
# White Students
146 Students
116,454 Students
% White Students
50%
53%
# Hawaiian Students
n/a
292 Students
% Hawaiian Students
n/a
n/a
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
142 Students
59,277 Students
% of Others Students
48%
27%
All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
2 extracurriculars
12 extracurriculars

Frequently Asked Questions

How many private schools are located in Mendham, NJ?
3 private schools are located in Mendham, NJ.
What percentage of students in Mendham go to private school?
17% of all K-12 students in Mendham are educated in private schools (compared to the NJ state average of 14%).
What percentage of private schools are religiously affiliated in Mendham?
33% of private schools in Mendham are religiously affiliated (most commonly Catholic).

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