South Mountain Elementary School

South Mountain Elementary School operates as a large primary school in S ORANGE, New Jersey, part of South Orange-Maplewood School District. Current enrollment sits at 613 students spanning grades K through 5. That puts it 51% above the typical public school in New Jersey, which averages around 405 students.

South Orange-Maplewood School District comprises 10 schools with combined enrollment of 6,728 students; South Mountain Elementary School is among them.

For racial and ethnic makeup, South Mountain Elementary School lists that White students make up the majority at 60%. Other groups include 13% multiracial, 12% Black, 11% Hispanic, 4% Asian. By comparison, Essex County as a whole is about 30% White, so the school skews visibly more White than its surroundings.

Looking at the economic backdrop, The school reports having 53 full-time-equivalent teachers, for a student-teacher ratio near 11.5:1. That tracks the state average closely. About 6% of enrolled students meet the income threshold for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. That share is south of Essex County's rate of about 54%.

Adjusting for the school's free-and-reduced-lunch share, South Mountain Elementary School sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 63.1%; this one delivers 63.0%.

In the surrounding community, ACS estimates for Essex County put median household income runs about $80,789, about 39% of the adult population holds a bachelor's degree or above, and census figures put the poverty rate at about 11%. In all, Essex County runs 249 public schools (combined enrollment of about 145,473 students), of which South Mountain Elementary School is one.

The closest other public school is South Orange Middle School, roughly 0.5 miles away. 8 of the 8 nearest public schools sit inside a five-mile radius. Among the 8 schools in that immediate cluster with test data (this one included), South Mountain Elementary School ranks 4th on composite proficiency, ahead of the local average of 60.8%.

South Mountain Elementary School operates from a residential location.

Over the past 7-year window. South Mountain Elementary School's enrollment has ticked up 4% since 2018, when it stood at 591 (now 613). Over the same period, the White share decreased from 64% to 60%. Class-load math has tightened: from 12.7:1 in 2018 to 11.5:1 in 2025.

Within the allk12 community for this school, the page collects discussion, questions, and updates around fundraisers, lost-and-found posts, and report-card season. Posting is open to anyone connected to the school.