West Windsor-Plainsboro High School South

Located at 346 CLARKSVILLE ROAD, in West Windsor, New Jersey, West Windsor-Plainsboro High School South is a roomy four-year high school that educates 1,627 students (grades 9 through 12), part of West Windsor-Plainsboro Regional School District. That puts it 75% above the typical public school in New Jersey, which averages around 929 students.

West Windsor-Plainsboro High School South is one of 10 schools operated by West Windsor-Plainsboro Regional School District, a district that teaches 8,831 students overall.

In terms of who attends, West Windsor-Plainsboro High School South shows that Asian students make up the majority at 74%. The remainder is composed of 13% White, 6% Hispanic, 5% Black, 2% multiracial. By comparison, Mercer County as a whole is about 12% Asian, so the school skews visibly more Asian than its surroundings.

On the income-and-resources front, On paper, West Windsor-Plainsboro High School South has 119 full-time-equivalent teachers, translating to a class-load average of around 13.7:1. The state averages around 12.7:1, so this campus is higher than the state norm typical. Around 9% of the student body qualifies for free or reduced-price meals, a number frequently used as a low-income enrollment indicator. By comparison, Mercer County runs at roughly 48%, so the school's eligibility rate is below the surrounding baseline.

After controlling for student poverty, West Windsor-Plainsboro High School South sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 61.1%; this one delivers 73.6%.

Across the wider county, the surrounding county (Mercer County) reports that median household income runs about $100,645, 45% of adults hold a bachelor's degree or higher, and roughly 7% of residents live below the federal poverty line. West Windsor-Plainsboro High School South is one of 110 public schools in Mercer County (combined enrollment of about 58,647 students).

Nearest neighbor: Maurice Hawk Elementary School, around 0.4 miles off. Counting just inside five miles, 8 other public schools cluster around West Windsor-Plainsboro High School South. Ranking that nearby cluster on reported proficiency puts West Windsor-Plainsboro High School South at 2nd of 9; the average score across the group is 68.8%.

Geographically, the school is in a residential area.

Five-year trend. Looking back 7 years, enrollment at West Windsor-Plainsboro High School South has stayed largely flat, going from 1,601 students in 2018 to 1,627 in 2025. Over the same period, the White share decreased from 27% to 13%.

Within the allk12 community for this school, posts here usually surface around enrollment questions, classroom assignments, and PTA news. Parents, students, alumni, and staff are welcome to weigh in.