Millstone River School

Located at 75 GROVERS MILL ROAD, in PLAINSBORO, New Jersey, Millstone River School is a sizable elementary campus that caters to 772 students (grades 3 through 5), part of West Windsor-Plainsboro Regional School District. By comparison, New Jersey's public schools average about 405 students each, so Millstone River School sits 91% above that benchmark.

West Windsor-Plainsboro Regional School District runs 10 schools in total, collectively educating 8,831 students. Millstone River School is one of those campuses.

In terms of who attends, Millstone River School lists that Asian students make up the majority at 76%; the rest breaks down as 8% White, 5% Hispanic, 5% Black, 4% multiracial. By comparison, Middlesex County as a whole is about 26% Asian, so the school skews visibly more Asian than its surroundings.

Looking at school resources, The school currently runs with 84 full-time-equivalent teachers, for a student-teacher ratio near 9.2:1. The state averages around 11.4:1, so this campus is tighter than the state norm typical. Around 10% of the student body qualifies for free or reduced-price meals, a commonly cited indicator of low-income enrollment. Set against Middlesex County (around 42%), the school's rate is noticeably below typical.

On a residual basis (actual vs predicted given the student mix), Millstone River School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 60.4%, the actual is 62.0%, a residual of +1.6 points.

In the area at large, Middlesex County reports that median household earnings sit near $111,549, about 46% of the adult population holds a bachelor's degree or above, and roughly 6% of residents live below the federal poverty line. In all, Middlesex County runs 214 public schools (combined enrollment of about 129,255 students), of which Millstone River School is one.

Nearest neighbor: Community Middle School, around 0.2 miles off. Counting just inside five miles, 8 other public schools cluster around Millstone River School. On composite proficiency, Millstone River School comes 8th of 8 in the immediate cluster, behind the nearby-schools average of 72.5%.

Geographically, the school is in a countryside area.

Looking at the recent track record. Millstone River School's enrollment has shrank 29% since 2018, when it stood at 1,088 (now 772). White enrollment moved from 15% to 8% across the same window. Class-load math has pulled in: from 12.5:1 in 2018 to 9.2:1 in 2025.

On allk12, the page collects discussion, questions, and updates around enrollment questions, classroom assignments, and PTA news. Members of the school community can share what they know.