South Mountain Elementary School
S Orange, NJ · Elementary School · Grades -1-5
South Mountain Elementary School is a elementary school in S Orange, NJ with 618 students enrolled and a 74% proficiency rate. Part of South Orange-Maplewood School District. NCES data from the U.S. Department of Education.
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About This School
South Mountain Elementary School is a elementary school located in S Orange, New Jersey. The school serves 618 students in grades -1-5. The student-to-teacher ratio is 12.6:1.
According to EDFacts assessment data, 74% of students meet grade-level proficiency standards in combined math and reading.
3% of students qualify for free or reduced-price lunch.
South Mountain Elementary School is part of the South Orange-Maplewood School District in New Jersey.
How This School Compares
South Mountain Elementary School has 618 students enrolled, making it smaller than the average school in South Orange-Maplewood School District (656 students). Its 74% proficiency rate is 9 percentage points above the district average of 65%. Compared to the New Jersey state average of 56%, the school performs 18 points higher. With a 12.6:1 student-teacher ratio, it offers smaller class sizes than the national average.
Other Schools in South Orange-Maplewood School District
Frequently Asked Questions
South Mountain Elementary School has 618 students enrolled in grades -1-5. The student-to-teacher ratio is 12.6:1.
According to EDFacts data, 74% of students at South Mountain Elementary School meet grade-level proficiency standards in combined math and reading assessments.
South Mountain Elementary School is part of the South Orange-Maplewood School District in S Orange, New Jersey. You can view all schools in this district on the district page.
All data on this page comes from the National Center for Education Statistics (NCES) Common Core of Data and EDFacts assessment results. These are official federal datasets published by the U.S. Department of Education.
School profiles are built from NCES directory data and EDFacts assessment results. Proficiency rates reflect combined math and reading performance. Graduation rates are reported for high schools with available data.
this entity is one of the data points covered by this site’s U.S. K-12 school outcomes and enrollment dataset. The detail above comes directly from NCES Common Core of Data and EDFacts; the context that follows situates the headline numbers against the broader distribution across U.S. public schools and districts.
Every number on this page links back to NCES Common Core of Data and EDFacts; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. public schools and districts with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: NCES Common Core of Data, 2026.