Allentown High School is a public high school that serves students in ninth through twelfth grades from three communities in Monmouth County, New Jersey, United States, operating as part of the Upper Freehold Regional School District. The school serves students from Allentown Borough and Upper Freehold Township. Millstone Township sends students to the High School as part of a sending/receiving relationship. The school has been accredited by the Middle States Association of Colleges and Schools Commission on Secondary Schools since 1959.