Average
#1140 of 2,466 schools in NJ
Top 46% in state
South Mountain School
Elementary School · Millburn Township School District
2 SOUTHERN SLOPE DRIVE, Millburn, NJ 07041
Enrollment
285
Student-Teacher
9.8:1
Score
6.6
Grades
Pre-K – 4th
Enrollment
285
Student-Teacher
9.8:1
Score
6.6
Grades
Pre-K – 4th
Data vintage
2022-23
Data vintage2022-23
How this school compares
New Jersey schools
#1,140 of 2,466
In Millburn
#5 of 5
public schools
In district
#8 of 8
Millburn Township School District
Equity
9.7 / 10
Excellent
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South Mountain School
Elementary School in Millburn · grades Pre-K – 4th. Start here, then compare fit against nearby and district options.
St Stephen's Preschool
0.5 mi away. Use as a geographic alternative in the same move search.
Wyoming School
0.7 mi away. Use as a geographic alternative in the same move search.
About South Mountain School
South Mountain School is a public elementary school in Millburn, NJ, part of Millburn Township School District. South Mountain School serves approximately 285 students, and covers grades Pre-K-4th, and has a 9.8:1 student-teacher ratio. South Mountain School has a current MySchoolScout rating of 6.6 out of 10 and ranks #1,140 of 2,466 schools in NJ.
Structured state assessment records for South Mountain School show 85% math proficiency (multi-year average, 2009-2025) and 82% reading/ELA proficiency (multi-year average, 2009-2025).
What's said publicly about South Mountain School
Synthesized from public, attributable sources. Updated May 2026.
Sources (1)
- This school 6.6 · Average
- District avg 7.6
- NJ avg 6.5
What Parents Should Know
At 9.8:1 students to teachers, South Mountain School sits well below the national average. Smaller classes like that usually mean more one-on-one time between students and teachers.
Score Breakdown
Full Profile · 3/3 metricsView breakdown
View breakdown
View breakdown
South Mountain School — Students at South Mountain School score 84% proficient, which is above what's typical for similar communities (expected: 67%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
2.1%
Students qualifying for federal meal assistance
Test Scores NJ NJSLA (2024-25)
Based on 36 test records from NJ state assessments. About our data
Proficiency Trend
→ StableAverage proficiency (% at or above grade level) across Math & ELA over time.
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Source: EdFacts (NCES) and state assessment data. Growth score: 4.0/10.
How South Mountain School Compares
See how South Mountain School performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Programs & Offerings
Data as of 2021-22 · Source: CRDC via Urban Institute · Learn more
Location
2 SOUTHERN SLOPE DRIVE, Millburn, NJ 07041
Nearby Alternatives
Families considering South Mountain School may also want to explore other elementary schools in the area. Tuscan Elementary School (rated 7.8/10, 1.4 miles away, in nearby Maplewood), which scores notably higher. Another option is Wyoming School (rated 7.6/10, 0.7 miles away), which scores slightly higher. Additionally, Battle Hill Elementary (rated 7.1/10, 1.4 miles away, in nearby Union), which scores slightly higher. For more schools in Millburn, see our Millburn schools guide .
Nearby Schools
20 within 1.8 mi| School | Distance | Rating |
|---|---|---|
| ST STEPHEN'S PRESCHOOL Millburn | 0.5 mi | — |
| Wyoming School Millburn | 0.7 mi | 7.6 |
| Washington School Millburn | 0.6 mi | 8.7 |
| SPRINGFIELD GENIUS ACADEMY Springfield | 0.8 mi | — |
| Millburn Middle School Millburn | 0.8 mi | 8.7 |
| THE CHILDREN'S ACADEMY Springfield | 0.8 mi | — |
| Millburn High School Millburn | 0.9 mi | 7.3 |
| James Caldwell Elementary School Springfield | 1.1 mi | 7.0 |
| Jefferson Elementary Union | 1.0 mi | 3.8 |
| Battle Hill Elementary Union | 1.4 mi | 7.1 |
| ST ROSE OF LIMA ACADEMY Short Hills | 1.1 mi | 6.6 |
| Jonathan Dayton High School Springfield | 1.2 mi | 5.0 |
| Union High School Union | 1.3 mi | 3.9 |
| Maplewood Middle School Maplewood | 1.3 mi | 7.5 |
| Hannah Caldwell Elementary Union | 1.5 mi | 4.0 |
| Delia Bolden Elementary School Maplewood | 1.5 mi | 5.3 |
| Florence M. Gaudineer Middle School Springfield | 1.6 mi | 7.4 |
| Tuscan Elementary School Maplewood | 1.4 mi | 7.8 |
| THE WINSTON SCHOOL Short Hills | 1.6 mi | 7.2 |
| Burnet Middle School Union | 1.8 mi | 5.5 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 07041 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$220,923
Median Home Value
$935,900
Median Rent
$1,969/mo
Population
7,610
College Educated
81.3%
Homeownership
68.1%
Avg Commute
41.6 min
Poverty Rate
3.9%
Median Age
39
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Alexander Hamilton School Glen Rock, NJ | 6.6 |
| Brookside Place School Cranford, NJ | 6.6 |
| CHRIST THE TEACHER ACADEMY Fort Lee, NJ | 6.6 |
| Hope Academy Charter School Asbury Park, NJ | 6.6 |
| Jefferson Elementary School Bergenfield, NJ | 6.6 |
| John Brainerd Elementary School Mount Holly, NJ | 6.6 |
Frequently Asked Questions
Common questions about South Mountain School
What grades does South Mountain School serve?
South Mountain School serves students in grades Pre-K through 4th.
How many students attend South Mountain School?
South Mountain School has an enrollment of approximately 285 students.
What is the student-teacher ratio at South Mountain School?
The student-teacher ratio at South Mountain School is 9.8:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does South Mountain School rank in NJ?
South Mountain School ranks #1,140 of 2,466 schools in NJ.
What is South Mountain School's MySchoolScout rating?
South Mountain School has a current MySchoolScout rating of 6.6 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at South Mountain School?
Based on loaded state assessment records, South Mountain School has 85% math proficiency (multi-year average, 2009-2025) and 82% reading/ELA proficiency (multi-year average, 2009-2025).
Is South Mountain School a charter school?
No, South Mountain School is not a charter school. It is a traditional public school operated by the local school district.
Is South Mountain School a Title I school?
No, South Mountain School is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for South Mountain School?
2.1% of students at South Mountain School qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Neighborhood Context
Powered by 
Quick Facts NCES CCD (SY 2022-23)
- Grades
- Pre-K – 4th
- Enrollment
- 285
- Student-Teacher Ratio
- 9.8:1
- Teachers (FTE)
- 29
- Free/Reduced Lunch
- 2.1%
- Type
- regular
- Setting
- Large Suburb
- County
- Essex County
- Chronic Absenteeism (SY 2022-23)
- 8.8%
- Phone
- (973) 921-1394
Resources & Links
District
Millburn Township School District- District Enrollment
- 4,737
- Schools in District
- 8
- Per-Pupil Spending
- $25,654
- District Rank
- #8 of 8
Other Schools in This District
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