Manalapan High School is a comprehensive four-year public high school located in Manalapan Township, in Monmouth County, in the U.S. state of New Jersey, operating as part of the Freehold Regional High School District. The school serves students in ninth through twelfth grades from all of Englishtown and portions of Manalapan. The Freehold Regional High School District also serves students from Colts Neck Township, Farmingdale, Freehold Borough, Freehold Township, Howell Township, and Marlboro Township. The school has been accredited by the Middle States Association of Colleges and Schools Commission on Elementary and Secondary Schools since 1975.

Manalapan Township is a township in western Monmouth County, in the U.S. state of New Jersey. The township is centrally located within the Raritan Valley region and is a part of the New York Metropolitan Area. As of the 2020 United States census, the township's population was 40,905, its highest decennial count ever and an increase of 2,033 (+5.2%) from the 2010 census count of 38,872, which in turn reflected an increase of 5,449 (+16.3%) from the 33,423 counted in the 2000 census.