Scotch Plains-Fanwood High School is a comprehensive regional four-year public high school in Union County, in the U.S. state of New Jersey, which serves students in ninth through twelfth grades from the Township of Scotch Plains and the Borough of Fanwood, operating as the lone secondary school of the Scotch Plains-Fanwood Regional School District. The school has been accredited by the Middle States Association of Colleges and Schools Commission on Elementary and Secondary Schools since 1932.

Scotch Plains is a township in Union County, in the U.S. state of New Jersey. The township is located on a ridge in northern-central New Jersey, within the Raritan Valley and Rahway Valley regions in the New York metropolitan area. As of the 2020 United States census, the township's population was 24,968, an increase of 1,458 (+6.2%) from the 2010 census count of 23,510, which in turn reflected an increase of 778 (+3.4%) from the 22,732 counted in the 2000 census.