Excellent
#87 of 2,463 schools in NJ
Top 4% 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
8.8
Grades
Pre-K – 4th
Enrollment
285
Student-Teacher
9.8:1
Score
8.8
Grades
Pre-K – 4th
Updated
2022-23
Updated 2022-23
How this school compares
In Millburn
#2 of 4
public schools
New Jersey elementary schools
#57 of 1,496
In district
#2 of 8
Millburn Township School District
Equity
9.8 / 10
Exceptional
About South Mountain School
South Mountain School is a public elementary school in Millburn, NJ, part of the Millburn Township School District. The school serves approximately 285 students in grades Pre-K – 4th with a student-teacher ratio of 9.8:1. It holds a MySchoolScout rating of 8.8/10, placing it in the 96.5th percentile among NJ schools — an above average rating overall.
Students demonstrate 84% proficiency in math, 37 points above the state average and 82% in reading/language arts, 34 points above the state average. The school scores particularly well in student growth (9.1/10). Located in a neighborhood with a median household income of $220,923, where 81% of adults hold a bachelor's degree or higher.
The school is situated in a large suburban setting.
What's said publicly about South Mountain School
Synthesized from public, attributable sources. Updated May 2026.
Sources (1)
What Parents Should Know
With a student-teacher ratio of 9.8:1, South Mountain School offers a notably low ratio compared to the national average. This typically means smaller class sizes and more opportunities for one-on-one interaction between students and teachers.
Score Breakdown
Full Profile · 3/3 metricsView breakdown
View breakdown
Data not available for this school
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South Mountain School — Students at South Mountain School score 82% proficient, which is above what's typical for similar communities (expected: 63%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
2.1%
Students qualifying for federal meal assistance
Test Scores NJ NJSLA (2023-24)
Based on 10 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: 9.1/10.
How South Mountain School Compares
See how South Mountain School performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Performance Trends
Math proficiency has remained stable from 82% (2019) to 82% (2022). Reading/ELA proficiency has remained stable from 82% (2019) to 82% (2022).
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 8.6/10, 1.4 miles away, in nearby Maplewood), with a very similar rating. Another option is Delia Bolden Elementary School (rated 8.4/10, 1.5 miles away, in nearby Maplewood), with a comparable rating. Additionally, Wyoming School (rated 7.5/10, 0.7 miles away), a more accessible option. 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 | 7.5 |
| Washington School Millburn | 0.6 mi | 7.2 |
| SPRINGFIELD GENIUS ACADEMY Springfield | 0.8 mi | — |
| Millburn Middle School Millburn | 0.8 mi | 7.3 |
| THE CHILDREN'S ACADEMY Springfield | 0.8 mi | — |
| Millburn High School Millburn | 0.9 mi | 8.9 |
| James Caldwell Elementary School Springfield | 1.1 mi | 6.1 |
| Jefferson Elementary Union | 1.0 mi | 3.6 |
| Battle Hill Elementary Union | 1.4 mi | 3.3 |
| ST ROSE OF LIMA ACADEMY Short Hills | 1.1 mi | 6.6 |
| Jonathan Dayton High School Springfield | 1.2 mi | 6.5 |
| Union High School Union | 1.3 mi | 3.8 |
| Maplewood Middle School Maplewood | 1.3 mi | 6.1 |
| Hannah Caldwell Elementary Union | 1.5 mi | 2.4 |
| Delia Bolden Elementary School Maplewood | 1.5 mi | 8.4 |
| Florence M. Gaudineer Middle School Springfield | 1.6 mi | 5.9 |
| Tuscan Elementary School Maplewood | 1.4 mi | 8.6 |
| THE WINSTON SCHOOL Short Hills | 1.6 mi | 7.2 |
| Burnet Middle School Union | 1.8 mi | 5.3 |
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
Community Profile
The community surrounding South Mountain School has a median household income of $220,923. It is a well-educated community where 81% of adults hold a bachelor's degree or higher. The median home value in the area is $935,900, with a median rent of $1,969/month. The local poverty rate of 3.9% is relatively low. The average commute in the area is 42 minutes, which is above the national average. Source: U.S. Census ACS 2022 5-Year Estimates.
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Dennis Township Primary School Cape May Court House, NJ | 8.8 |
| Edgemont Elementary School Montclair, NJ | 8.8 |
| Hamburg School Hamburg, NJ | 8.8 |
| Point Road School Little Silver, NJ | 8.8 |
| Randall Carter Elementary School Wayne, NJ | 8.8 |
| Summerfield Elementary School Neptune, NJ | 8.8 |
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 is ranked #87 out of 2,463 schools in NJ.
What is South Mountain School's MySchoolScout rating?
South Mountain School has a composite rating of 8.8 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.
What are the test scores at South Mountain School?
Based on the most recent state assessment data, South Mountain School has 83.9% math proficiency and 81.9% reading/ELA proficiency.
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 
FBI UCR 2024. County-level only. Data >1 year old.
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
- Phone
- (973) 921-1394
- Data Year
- 2023–2024
Resources & Links
District
Millburn Township School District- District Enrollment
- 4,737
- Schools in District
- 8
- Per-Pupil Spending
- $25,654
- District Rank
- #2 of 8
Other Schools in This District
How We Rate Schools
Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.
Read our full methodologyRelated reading
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