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²ÝÁñÉçÇø School Review - Established 2003
American Boys Preparatory Academy
Kohler Academy

Mountainside ²ÝÁñÉçÇø Schools (2026-27)

For the 2026-27 school year, there are 3 private schools serving 238 students in Mountainside, NJ, 24% of all K-12 students in Mountainside, NJ are educated in private schools versus (compared to the NJ state average of 14%).
The average acceptance rate is 75%, which is lower than the New Jersey private school average acceptance rate of 78%.

Quick Facts (2026-27)

Quick Facts (2026-27)

²ÝÁñÉçÇø Schools in Mountainside, NJ (2026-27)

American Boys Preparatory Academy Photo
American Boys Preparatory Academy
Gr: 5-8 | 12 students
Avg. class size: 5 students
Sports: 1 | Extracurriculars: 7
All-boys | Alternative School
1020 Springfield Ave
Mountainside, NJ 07092
(908) 516-4231
(1)
View Profile
Kohler Academy Photo
Kohler Academy
Gr: PK-12 | 35 students
Special Education School
1137 Globe Ave
Mountainside, NJ 07092
(908) 518-0021
View Profile
Map of Primrose School At Mountainside
Primrose School At Mountainside
Gr: PK-K | 191 students
Daycare / Preschool
1038 Springfield Ave
Mountainside, NJ 70922
(908) 228-5589
View Profile

Mountainside, NJ ²ÝÁñÉçÇø School Trends (10-Year)

3
²ÝÁñÉçÇø Schools
+50.0% (+1 school) 10-yr
238
Students
+150.5% (+143 students) 10-yr
$5,400
Avg. Tuition
-40.0% (-$3,600) 6-yr
5
Avg. Class Size
-16.7% (-1 student) 9-yr
25%
Students of Color
-35.9% (-14.0 pp) 10-yr
24:1
Student-Teacher Ratio
+242.9% (+17.0) 10-yr
Download town snapshot: CSV | XML | JSON Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission.
Enrollment & Diversity
Category
This Town (Mountainside)
This State (NJ)
# Schools
3 Schools
1,374 Schools
# Students
238 Students
216,366 Students

Trends in the Average Number of Students Per ²ÝÁñÉçÇø School

YearMountainside, NJ AvgNew Jersey (NJ)National
202579168179
202479165172
202380164174
202224167185
202123165180
202036160171
201926164175
201866164172
201770167180
201670166178
201548154167
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% Students of Color
25%
40%

Percentage of Students of Color Trends (2015-2025)

YearMountainside, NJ AvgNew Jersey (NJ)National
202525%40%34%
202425%39%34%
202323%40%33%
202244%38%33%
202144%39%32%
202044%39%32%
201965%38%31%
201833%37%31%
201730%38%32%
201630%38%32%
201539%37%32%
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0.35
0.63

Diversity Score Trends

YearMountainside, NJ AvgNew Jersey (NJ)National
20250.350.630.65
20240.350.640.65
20230.400.650.65
20220.600.650.64
20210.600.650.64
20200.600.650.64
20190.770.650.63
20180.700.650.63
20170.650.640.61
20160.650.650.61
20150.660.650.61
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Show more data/charts: racial breakdown
# American Indian Students
n/a
942 Students
% American Indian Students
n/a
n/a
# Asian Students
1 Student
11,318 Students
% Asian Students
n/a
5%

Asian Student Percentage Trends

YearMountainside, NJ AvgNew Jersey (NJ)National
20192%5%4%
20181%5%4%
20171%5%4%
20161%5%4%
20152%4%4%
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# Hispanic Students
5 Students
15,574 Students
% Hispanic Students
2%
7%

Hispanic Student Percentage Trends

YearMountainside, NJ AvgNew Jersey (NJ)National
20252%8%9%
20242%7%9%
20235%7%9%
202221%7%8%
202121%8%9%
202021%8%9%
201921%8%8%
20189%8%8%
20179%8%8%
20169%8%8%
201513%8%8%
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# Black Students
4 Students
14,112 Students
% Black Students
2%
7%

Black Student Percentage Trends

YearMountainside, NJ AvgNew Jersey (NJ)National
20252%6%7%
20242%7%7%
20234%7%8%
202221%8%7%
202121%8%7%
202021%8%8%
201929%9%7%
201813%9%7%
20178%9%7%
20168%9%7%
201512%9%8%
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# White Students
25 Students
116,208 Students
% White Students
11%
54%

White Student Percentage Trends

YearMountainside, NJ AvgNew Jersey (NJ)National
202511%53%52%
202411%53%52%
202315%51%52%
202256%52%54%
202156%52%54%
202056%52%54%
201931%52%56%
201837%52%56%
201735%53%58%
201635%53%58%
201552%51%58%
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# Hawaiian Students
11 Students
292 Students
% Hawaiian Students
5%
n/a
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
180 Students
58,685 Students
% of Others Students
80%
27%

Other Races Student Percentage Trends

YearMountainside, NJ AvgNew Jersey (NJ)National
202580%27%26%
202480%27%26%
202376%29%25%
201912%26%24%
201838%26%23%
201747%25%22%
201647%25%22%
201521%28%21%
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All Ethnic Groups
Academics
# Teachers
10 Teachers
20,263 Teachers
Average Student-Teacher Ratio
24:1
11:1

Student-Teacher Ratio Trends (2015-2025)

YearMountainside, NJ AvgNew Jersey (NJ)National
202524:111:111:1
202424:111:111:1
202324:111:111:1
20226:111:111:1
20216:111:111:1
20206:111:112:1
20197:111:112:1
20186:111:112:1
20176:111:112:1
20166:111:112:1
20157:112:112:1
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% Average Faculty w/Advanced Degree
50%
53%

Percentage of Faculty With Advanced Degrees Trends (2016-2025)

YearMountainside, NJ AvgNew Jersey (NJ)National
202550%54%55%
202450%53%54%
202350%54%54%
202250%54%54%
202150%53%54%
201950%53%53%
201830%53%53%
201730%52%53%
201630%50%52%
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Average Class Size
5 students
14 students

Class Size Trends (2016-2025)

YearMountainside, NJ AvgNew Jersey (NJ)National
202551415
202451415
202351415
202251415
2021101415
2019101415
201881415
201781415
201661415
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Tuition & Aid
Average Yearly Tuition Cost
$5,400
$18,745

Tuition Cost Trends (2019-2025)

YearMountainside, NJ AvgNew Jersey (NJ)National
2025$5,400$18,947$15,012
2024$5,400$15,878$13,254
2023$5,400$15,215$12,626
2022$5,400$14,919$12,187
2021$5,400$13,993$11,800
2019$9,000$13,406$11,293
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Admissions & Athletics
Average Acceptance Rate
75%
78%

Acceptance Rate Trends (2019-2025)

YearMountainside, NJ AvgNew Jersey (NJ)National
202575%77%81%
202475%78%85%
202375%80%85%
202275%79%85%
202175%79%85%
201980%79%85%
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Average Number of Extracurriculars
7 extracurriculars
12 extracurriculars
Average Number of Sports
1 sports
7 sports

Frequently Asked Questions

How many private schools are located in Mountainside, NJ?
3 private schools are located in Mountainside, NJ.
What percentage of students in Mountainside go to private school?
24% of all K-12 students in Mountainside are educated in private schools (compared to the NJ state average of 14%).

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