A
Millstone River School
PublicElementaryGrades 3–5
75 Grovers Mill Road, Plainsboro, NJ 08536 · (609) 716-5500 · Part of West Windsor-Plainsboro Regional School District
Students
772
Students per teacher
9:1
Free or reduced lunch
10%
Setting
Rural
Grades
3–5
What stands out about Millstone River School
- School Grade A: near the top of New Jersey’s public schools
- Math proficiency 31 pts above the state
- Reading / language arts 12 pts above the state
- Small classes: 9:1 students per teacher
- Enrollment down 20.2% since 2020
Test scores
EDFacts via Urban Institute Education Data Portal (SY2020-21) · 2020–21Math proficiency56%
State average 25.4%
Reading / language arts59%
State average 47.3%
Location
Directions ↗
75 Grovers Mill Road, Plainsboro
Students
Enrollment by grade
Grade 3147
Grade 4291
Grade 5334
Enrollment over time
967’20
869’21
831’22
813’23
772’24
Down 20.2% since 2020.
Who goes here
Asian 76%White 8%Hispanic 5%Black 5%Two or more races 4%American Indian/Alaska Native <1%
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 Millstone River School.
Other schools in West Windsor-Plainsboro Regional 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.