For the 2026 school year, there are 2 public schools serving 748 students in Mountainside, NJ (there are 3 private schools, serving 239 private students). 75% of all K-12 students in Mountainside, NJ are educated in public schools (compared to the NJ state average of 87%).
The top-ranked public school in Mountainside, NJ is Deerfield Elementary School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Mountainside, NJ public schools have an average math proficiency score of 76% (versus the New Jersey public school average of 38%), and reading proficiency score of 81% (versus the 49% statewide average). Schools in Mountainside have an average ranking of 10/10, which is in the top 5% of New Jersey public schools.
Minority enrollment is 31% of the student body (majority Hispanic), which is less than the New Jersey public school average of 63% (majority Hispanic).
Best Public Schools in Mountainside, NJ (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Deerfield Elementary School
(Math: 76% | Reading: 81%)
Rank:
Rank:
10/
Top 10%10
302 Central Avenue
Mountainside, NJ 07092
(908) 232-8828
Mountainside, NJ 07092
(908) 232-8828
Gr: 3-8 | 483 students Student-teacher ratio: 11:1 Minority enrollment: 31%
Rank: n/an/a
1497 Woodacres Dr
Mountainside, NJ 07092
(908) 301-9104
Mountainside, NJ 07092
(908) 301-9104
Gr: PK-2 | 265 students Student-teacher ratio: 13:1 Minority enrollment: 33%
Frequently Asked Questions
What are the top-ranked public schools in Mountainside, NJ?
The top-ranked public schools in Mountainside, NJ include Deerfield Elementary School.
How many public schools are located in Mountainside?
2 public schools are located in Mountainside.
What percentage of students in Mountainside go to public school?
75% of all K-12 students in Mountainside are educated in public schools (compared to the NJ state average of 87%).
What is the racial composition of students in Mountainside?
Mountainside public schools minority enrollment is 31% of the student body (majority Hispanic), which is less than the New Jersey public schools average of 63% (majority Hispanic).
Which public schools in Mountainside are often viewed compared to one another?
Popular comparisons of public schools in Mountainside include: Beechwood School vs. Deerfield Elementary School, Deerfield Elementary School vs. Beechwood School
Recent Articles
AI Report Cards: Should Schools Evaluate AI Use?
Explore whether schools should assess student AI use, the benefits, risks, and what responsible AI report cards could look like in 2026.
The Parent’s Guide to School Cell Phone Bans in 2026
Learn how school cell phone bans work in 2026, why districts are adopting them, and what parents should expect.
Parental Involvement in Public Schools: 2026 Update
Explore the latest 2026 trends, research, and strategies shaping parental involvement in public schools and student success.