North Plainfield High School is a four-year comprehensive public high school serving students in ninth through twelfth grade from North Plainfield, in Somerset County, New Jersey, United States, operating as part of the North Plainfield School District. The school is fully certified by the New Jersey Department of Education and has been accredited by the Middle States Association of Colleges and Schools Commission on Elementary and Secondary Schools since 1929, with the school's accreditation extended for seven years in Spring 2012.