West Windsor-Plainsboro Regional School District

The West Windsor-Plainsboro Regional School District is a comprehensive high achieving regional public school district in the U.S. state of New Jersey, serving students in pre-kindergarten through twelfth grade from West Windsor Township (in Mercer County) and Plainsboro Township (in Middlesex County). There are four elementary schools (grades PreK/K - 3), two upper elementary schools (grades 4 and 5), two middle schools (grades 6 - 8) and two high schools (grades 9 - 12). Niche.com listed the district as fifth best in New Jersey, and 73rd best in the nation, according to its 2025 Best Schools ranking.

As of the 2020–21 school year, the district, comprising 10 schools, had an enrollment of 9,386 students and 773.2 classroom teachers (on an FTE basis), for a student–teacher ratio of 12.1:1.

The district is classified by the New Jersey Department of Education as being in District Factor Group "J", the highest of eight groupings. District Factor Groups organize districts statewide to allow comparison by common socioeconomic characteristics of the local districts. From lowest socioeconomic status to highest, the categories are A, B, CD, DE, FG, GH, I and J.