Stony Brook School

Stony Brook School, a close-knit elementary school in North Plainfield, New Jersey, part of North Plainfield School District, serves 272 students, covering grades pre-K through 4. That puts it 33% leaner than the typical public school in New Jersey, which averages around 405 students.

North Plainfield School District comprises 6 schools with combined enrollment of 3,487 students; Stony Brook School is among them.

On demographics, Stony Brook School reports that nearly all students (90%) are Hispanic. Other groups include 6% White, 2% Black. The wider county runs roughly 18% Hispanic, putting the school's mix visibly more Hispanic than the area baseline.

Looking at the economic backdrop, Staff filings list 28 full-time-equivalent teachers, which works out to roughly 9.7:1 students per teacher. The state averages around 11.4:1, so this campus is tighter than the state norm typical. An estimated 89% of students are eligible for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. By comparison, Somerset County runs at roughly 28%, so the school's eligibility rate is above the surrounding baseline.

On a demographically-adjusted basis, Stony Brook School sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 17.3%; this one delivers 19.4%.

Around the school, ACS estimates for Somerset County put median household earnings sit near $140,374, roughly 58% of adults have completed at least a four-year degree, and roughly 4% of residents live below the federal poverty line. Across Somerset County's 84 public schools (combined enrollment of about 51,276 students), Stony Brook School is one campus in the mix.

The closest other public school is North Plainfield Middle School, roughly 0.1 miles away. Counting just inside five miles, 8 other public schools cluster around Stony Brook School. Among the 9 schools in that immediate cluster with test data (this one included), Stony Brook School ranks 6th on composite proficiency, below the local average of 21.9%.

Geographically, the school is in a bedroom-community area.

Over the past 7-year window. Over the past 7-year window, the student count increased 11%: 245 students in 2018 compared to 272 in 2025. Hispanic enrollment moved from 71% to 90% across the same window. Class-load math has pulled in: from 12.3:1 in 2018 to 9.7:1 in 2025.

On this page, posts here usually surface around pickup logistics, teacher feedback, and after-school programs. Parents, students, alumni, and staff are welcome to weigh in.