A+
South Mountain School
PublicElementaryGrades PK–4
2 Southern Slope Drive, Millburn, NJ 07041 · (973) 921-1394 · Part of Millburn Township School District
Students
278
Students per teacher
10:1
Free or reduced lunch
3%
Setting
Suburb
Grades
PK–4
What stands out about South Mountain School
- School Grade A+: near the top of New Jersey’s public schools
- Math proficiency 52 pts above the state
- Reading / language arts 30 pts above the state
- Small classes: 10:1 students per teacher
Test scores
EDFacts via Urban Institute Education Data Portal (SY2020-21) · 2020–21Math proficiency77%
State average 25.4%
Reading / language arts77%
State average 47.3%
Location
Directions ↗
2 Southern Slope Drive, Millburn
Students
Enrollment by grade
Pre-K42
Kindergarten41
Grade 145
Grade 244
Grade 349
Grade 457
Enrollment over time
274’20
288’21
284’22
285’23
278’24
About steady.
Who goes here
Asian 55%White 26%Two or more races 8%Hispanic 6%Black 5%
As reported to NCES, share of students with a reported race or ethnicity.
What neighbors say
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Parents talk
Conversations in Town Square that mention South Mountain School.
Other schools in Millburn Township School District
School facts: U.S. Department of Education (NCES), 2024-2025 school year. Scores: EDFacts via Urban Institute Education Data Portal (SY2020-21). The School Grade is our own summary of state test results. Neighbor ratings are opinions, not an official measure of school quality.